We earn net service revenue through our home health and hospice care centers by providing a variety of services almost exclusively in the homes of our patients. This net service revenue is earned and billed either on an episode of care basis, on a per visit basis or on a daily basis depending upon the payment terms and conditions established with each payor for services provided. We refer to home health revenue earned and billed on a 60-day episode of care as episodic-based revenue.

When we record our service revenue, we record it net of estimated revenue adjustments and contractual adjustments to reflect amounts we estimate to be realizable for services provided, as discussed below. We believe, based on information currently available to us and based on our judgment, that changes to one or more factors that impact the accounting estimates (such as our estimates related to revenue adjustments, contractual adjustments and episodes in progress) we make in determining net service revenue, which changes are likely to occur from period to period, will not materially impact our reported consolidated financial condition, results of operations, cash flows or our future financial results.

Net service revenue is recorded under the Medicare prospective payment system (“PPS”) based on a 60-day episode payment rate that is subject to adjustment based on certain variables including, but not limited to: (a) an outlier payment if our patient's care was unusually costly (capped at 10% of total reimbursement per provider number); (b) a low utilization payment adjustment (“LUPA”) if the number of visits was fewer than five; (c) a partial payment if our patient transferred to another provider or we received a patient from another provider before completing the episode; (d) a payment adjustment based upon the level of therapy services required (with various incremental adjustments made for additional visits, with larger payment increases associated with the sixth, fourteenth and twentieth visit thresholds); (e) adjustments to payments if we are unable to perform periodic therapy assessments; (f) the number of episodes of care provided to a patient, regardless of whether the same home health provider provided care for the entire series of episodes; (g) changes in the base episode payments established by the Medicare Program; (h) adjustments to the base episode payments for case mix and geographic wages; and (i) recoveries of overpayments. In addition, we make adjustments to Medicare revenue if we find that we are unable to produce appropriate documentation of a face to face encounter between the patient and physician.

We make adjustments to Medicare revenue to reflect differences between estimated and actual payment amounts, our discovered inability to obtain appropriate billing documentation or authorizations and other reasons unrelated to credit risk. We estimate the impact of such adjustments based on our historical experience, which primarily includes a historical collection rate of over 99% on Medicare claims, and record this estimate during the period in which services are rendered as an estimated revenue adjustment and a corresponding reduction to patient accounts receivable. Therefore, we believe that our reported net service revenue and patient accounts receivable will be the net amounts to be realized from Medicare for services rendered.

In addition to revenue recognized on completed episodes, we also recognize a portion of revenue associated with episodes in progress. Episodes in progress are 60-day episodes of care that begin during the reporting period, but were not completed as of the end of the period. We estimate this revenue on a monthly basis based upon historical trends. The primary factors underlying this estimate are the number of episodes in progress at the end of the reporting period, expected Medicare revenue per episode and our estimate of the average percentage complete based on visits performed. As of December 31, 2015 and 2014, the difference between the cash received from Medicare for a request for anticipated payment (“RAP”) on episodes in progress and the associated estimated revenue was immaterial and, therefore, the resulting credits were recorded as a reduction to our outstanding patient accounts receivable in our consolidated balance sheets for such periods.

Episodic-based Revenue. We recognize revenue in a similar manner as we recognize Medicare revenue for episodic-based rates that are paid by other insurance carriers, including Medicare Advantage programs; however, these rates can vary based upon the negotiated terms.

Non-episodic based Revenue. Gross revenue is recorded on an accrual basis based upon the date of service at amounts equal to our established or estimated per-visit rates, as applicable. Contractual adjustments are recorded for the difference between our standard rates and the contracted rates to be realized from patients, third parties and others for services provided and are deducted from gross revenue to determine net service revenue and are also recorded as a reduction to our outstanding patient accounts receivable. In addition, we receive a minimal amount of our net service revenue from patients who are either self-insured or are obligated for an insurance co-payment.

Gross revenue is recorded on an accrual basis based upon the date of service at amounts equal to the estimated payment rates. The estimated payment rates are daily or hourly rates for each of the four levels of care we deliver. The four levels of care are routine care, general inpatient care, continuous home care and respite care. Routine care accounts for 99%, 98%, and 99% of our total net Medicare hospice service revenue for 2015, 2014 and 2013, respectively. We make adjustments to Medicare revenue for an inability to obtain appropriate billing documentation or acceptable authorizations and other reasons unrelated to credit risk. We estimate the impact of these adjustments based on our historical experience, which primarily includes our historical collection rate on Medicare claims, and record it during the period services are rendered as an estimated revenue adjustment and as a reduction to our outstanding patient accounts receivable.

Additionally, as Medicare hospice revenue is subject to an inpatient cap limit and an overall payment cap for each provider number, we monitor these caps and estimate amounts due back to Medicare if we estimate a cap has been exceeded. We record these adjustments as a reduction to revenue and an increase in other accrued liabilities. Beginning for the cap year ending October 31, 2014, providers are required to self-report and pay their estimated cap liability by March 31st of the following year. As of December 31, 2015, we have settled our Medicare hospice reimbursements for all fiscal years through October 31, 2012 and we have recorded $1.4 million for estimated amounts due back to Medicare in other accrued liabilities for the Federal cap years ended October 31, 2013 through October 31, 2016. As of December 31, 2014, we had recorded $2.8 million for estimated amounts due back to Medicare in other accrued liabilities for the Federal cap years ended October 31, 2013 through October 31, 2015.

We record gross revenue on an accrual basis based upon the date of service at amounts equal to our established rates or estimated per day rates, as applicable. Contractual adjustments are recorded for the difference between our established rates and the amounts estimated to be realizable from patients, third parties and others for services provided and are deducted from gross revenue to determine our net service revenue and patient accounts receivable.

Cash and cash equivalents include certificates of deposit and all highly liquid debt instruments with maturities of three months or less when purchased.

Our patient accounts receivable are uncollateralized and consist of amounts due from Medicare, Medicaid, other third-party payors and patients. As of December 31, 2015, there is one single payor, other than Medicare, that accounts for more than 10% of our total outstanding patient receivables (approximately 10.5%). Thus, we believe there are no other significant concentrations of receivables that would subject us to any significant credit risk in the collection of our patient accounts receivable. We fully reserve for accounts which are aged at 365 days or greater. We write off accounts on a monthly basis once we have exhausted our collection efforts and deem an account to be uncollectible.

We believe the credit risk associated with our Medicare accounts, which represent 64% and 69% of our net patient accounts receivable at December 31, 2015 and December 31, 2014, respectively, is limited due to our historical collection rate of over 99% from Medicare and the fact that Medicare is a U.S. government payor. Accordingly, we do not record an allowance for doubtful accounts for our Medicare patient accounts receivable, which are recorded at their net realizable value after recording estimated revenue adjustments as discussed above. During 2015, 2014 and 2013, we recorded $6.1 million, $5.1 million and $9.0 million, respectively, in estimated revenue adjustments to Medicare revenue.

We believe there is a certain level of credit risk associated with non-Medicare payors. To provide for our non-Medicare patient accounts receivable that could become uncollectible in the future, we establish an allowance for doubtful accounts to reduce the carrying amount to its estimated net realizable value.

For our home health patients, our pre-billing process includes verifying that we are eligible for payment from Medicare for the services that we provide to our patients. Our Medicare billing begins with a process to ensure that our billings are accurate through the utilization of an electronic Medicare claim review. We submit a RAP for 60% of our estimated payment for the initial episode at the start of care or 50% of the estimated payment for any subsequent episodes of care contiguous with the first episode for a particular patient. The full amount of the episode is billed after the episode has been completed (“final billed”). The RAP received for that particular episode is then deducted from our final payment. If a final bill is not submitted within the greater of 120 days from the start of the episode, or 60 days from the date the RAP was paid, any RAPs received for that episode will be recouped by Medicare from any other claims in process for that particular provider number. The RAP and final claim must then be resubmitted.

For our hospice patients, our pre-billing process includes verifying that we are eligible for payment from Medicare for the services that we provide to our patients. Our Medicare billing begins with a process to ensure that our billings are accurate through the utilization of an electronic Medicare claim review. Once each patient has been confirmed for eligibility, we will bill Medicare on a monthly basis for the services provided to the patient.

For our non-Medicare patients, our pre-billing process primarily begins with verifying a patient's eligibility for services with the applicable payor. Once the patient has been confirmed for eligibility, we will provide services to the patient and bill the applicable payor. Our review and evaluation of non-Medicare accounts receivable includes a detailed review of outstanding balances and special consideration to concentrations of receivables from particular payors or groups of payors with similar characteristics that would subject us to any significant credit risk. We estimate an allowance for doubtful accounts based upon our assessment of historical and expected net collections, business and economic conditions, trends in payment and an evaluation of collectability based upon the date that the service was provided. Based upon our best judgment, we believe the allowance for doubtful accounts adequately provides for accounts that will not be collected due to credit risk.

Property and equipment is stated at cost and we depreciate it on a straight-line basis over the estimated useful lives of the assets. Additionally, we have internally developed computer software for our own use. Additions and improvements (including interest costs for construction of qualifying long-lived assets) are capitalized. Maintenance and repair expenses are charged to expense as incurred. The cost of property and equipment sold or disposed of and the related accumulated depreciation are eliminated from the property and related accumulated depreciation accounts, and any gain or loss is credited or charged to other general and administrative expenses.

We consider our reporting units to represent asset groups for purposes of testing long-lived assets for impairment. We assess the impairment of a long-lived asset group whenever events or changes in circumstances indicate that the asset's carrying value may not be recoverable. Factors we consider important that could trigger an impairment review include but are not limited to the following:

If we determine that the carrying value of long-lived assets may not be recoverable, we compare the carrying value of the asset group to the undiscounted cash flows expected to be generated by the asset group. If the carrying value exceeds the undiscounted cash flows, an impairment charge is indicated. An impairment charge is recognized to the extent that the carrying value of the asset group exceeds its fair value.

We generally provide for depreciation over the following estimated useful service lives.

			Years
	Building		39
	Leasehold improvements		Lesser of life or lease or expected useful life
	Equipment and furniture		3 to 7
	Vehicles		5
	Computer software		3 to 7

As of December 31, 2014, we had $75.8 million of internally developed software costs related to the development of AMS3 Home Health and Hospice. Expanded beta testing to additional sites in February of 2015 demonstrated that AMS3 was disruptive to operations. Additional analysis of the system determined that the system was not ready to be fully implemented and would require significant time and investment to redesign. Therefore, during the three-month period ended March 31, 2015, we made the decision to discontinue AMS3 and recorded a non-cash asset impairment charge of $75.2 million to write-off the software costs incurred related to the development of AMS3 Home Health and Hospice.

During the three-month period ended September 30, 2015, we commenced an active program to sell our corporate headquarters located in Baton Rouge, Louisiana. In accordance with U.S. GAAP, we classified this asset as held for sale and reduced the carrying value of the asset to its estimated fair value less estimated costs to sell the asset; no further depreciation expense for the asset was recorded. As a result, we recorded a non-cash asset impairment charge of $2.1 million during the three-month period ended September 30, 2015. The asset was sold during the three-month period ended December 31, 2015 and the Company now leases relevant office space.

The following table summarizes the balances related to our property and equipment for 2015 and 2014 (amounts in millions):

		As of December 31,
		2015		2014
Land	$	0.0	$	3.2
Building and leasehold improvements		2.3		25.3
Equipment and furniture		89.6		97.2
Computer software		92.6		158.2
		184.5		283.9
Less: accumulated depreciation		(141.8)		(146.4)
	$	42.7	$	137.5

Depreciation expense for 2015, 2014 and 2013 was $20.0 million, $28.0 million and $35.2 million, respectively.

Goodwill represents the amount of the purchase price in excess of the fair values assigned to the underlying identifiable net assets of acquired businesses. Goodwill is not amortized, but is subject to an annual impairment test. Tests are performed more frequently if events occur or circumstances change that would more likely than not reduce the fair value of the reporting unit below its carrying amount. These events or circumstances include but are not limited to, a significant adverse change in the business environment; regulatory environment or legal factors; or a substantial decline in market capitalization of our stock. To determine whether goodwill is impaired, we perform a two-step impairment test. In the first step of the test, the fair values of the reporting units are compared to their aggregate carrying values, including goodwill. If the fair value of the reporting unit is greater than its carrying amount, goodwill is not considered impaired and no further testing is required. If the fair value of the reporting unit is less than its carrying amount, we would proceed to step two of the test. In step two of the test, the implied fair value of the goodwill of the reporting unit is determined by a hypothetical allocation of the fair value calculated in step one to all of the assets and liabilities of that reporting unit (including any recognized and unrecognized intangible assets) as if the reporting unit had been acquired in a business combination and the fair value was reflective of the price paid to acquire the reporting unit. The implied fair value of goodwill is the excess, if any, of the calculated fair value after hypothetical allocation to the reporting unit's assets and liabilities. If the implied fair value of the goodwill is greater than the carrying amount of the goodwill at the analysis date, goodwill is not impaired and the analysis is complete. If the implied fair value of the goodwill is less than the carrying value of goodwill at the analysis date, goodwill is deemed impaired by the amount of that variance.

We calculate the estimated fair value of our reporting units using discounted cash flows as well as a market approach that compares our reporting units' earnings and revenue multiples to those of comparable public companies. To determine fair value we must make assumptions about a wide variety of internal and external factors. Significant assumptions used in the impairment analysis include financial projections of free cash flow (including significant assumptions about operations, in particular expected organic growth rates, future Medicare reimbursement rates, capital requirements and income taxes), long-term growth rates for determining terminal value, and discount rates. Our estimates of discounted cash flows may differ from actual cash flows due to, among other things, economic conditions, changes to our business model or changes in operating performance. These factors increase the risk of differences between projected and actual performance that could impact future estimates of fair value of all reporting units. Significant differences between these estimates and actual cash flows could result in additional impairment in future periods.

Each of our operating segments described in Note 15 – Segment Information is considered to represent an individual reporting unit for goodwill impairment testing purposes. We consider each of our home health care centers to constitute an individual business for which discrete financial information is available. However, since these care centers have substantially similar operating and economic characteristics and resource allocation and significant investment decisions concerning these businesses are centralized and the benefits broadly distributed, we have aggregated these care centers and deemed them to constitute a single reporting unit. We have applied this same aggregation principle to our hospice care centers and have also deemed them to be a single reporting unit.

During 2015, we did not record any goodwill impairment charges as a result of our annual impairment test and none of the goodwill associated with our various reporting units was considered at risk of impairment as of October 31, 2015. Since the date of our last annual goodwill impairment test, there have been no material developments, events, changes in operating performance or other circumstances that would cause management to believe it is more likely than not that the fair value of any of our reporting units would be less than its carrying amount.

Intangible assets consist of Certificates of Need, licenses, acquired names, non-compete agreements and reacquired franchise rights. We amortize non-compete agreements, acquired names that we do not intend to use in the future and reacquired franchise rights on a straight-line basis over their estimated useful lives, which is generally three years for non-compete agreements and up to five years for reacquired franchise rights and acquired names.

We amortize deferred debt issuance costs related to our long-term obligations over its term through interest expense, unless the debt is extinguished, in which case unamortized balances are immediately expensed. We amortized $0.8 million, $0.7 million and $0.7 million in deferred debt issuance costs in 2015, 2014 and 2013, respectively. As of December 31, 2015 and 2014, we had unamortized debt issuance costs of $3.4 million and $2.8 million, respectively, recorded as other assets in our accompanying consolidated balance sheets. During the third quarter of 2015, we expensed $1.0 million of unamortized debt issuance costs when we entered into our new Credit Agreement. In connection with the new Credit Agreement we recorded an additional $2.4 million in deferred debt issuance costs as other assets in our consolidated balance sheet. The unamortized debt issuance costs of $3.4 million at December 31, 2015, will be amortized over a weighted-average amortization period of 4.6 years.

The fair value hierarchy is based on three levels of inputs, of which the first two are considered observable and the last unobservable, that may be used to measure fair value. The three levels of inputs are as follows:

Our deferred compensation plan assets are recorded at fair value and are considered a level 2 measurement. For our other financial instruments, including our cash and cash equivalents, patient accounts receivable, accounts payable, payroll and employee benefits and accrued expenses, we estimate the carrying amounts' approximate fair value. As of December 31, 2015, the carrying amount of our long-term debt is subject to a variable rate of interest based on current market rates, and as such, the carrying value approximates fair value.

We use the asset and liability approach for measuring deferred tax assets and liabilities based on temporary differences existing at each balance sheet date using currently enacted tax rates. Our deferred tax calculation requires us to make certain estimates about future operations. Deferred tax assets are reduced by a valuation allowance when we believe it is more likely than not that some portion or all of the deferred tax assets will not be realized. The effect of a change in tax rate is recognized as income or expense in the period that includes the enactment date. As of December 31, 2015 and 2014 our net deferred tax assets were $125.2 million and $122.4 million, respectively.

Management regularly assesses the ability to realize deferred tax assets recorded in the Company's entities based upon the weight of available evidence, including such factors as the recent earnings history and expected future taxable income. In the event future taxable income is below management's estimates or is generated in tax jurisdictions different than projected, we could be required to increase the valuation allowance for deferred tax assets. This would result in an increase in our effective tax rate.

We record all share-based compensation as expense in the financial statements measured at the fair value of the award. We recognize compensation cost on a straight-line basis over the requisite service period for each separately vesting portion of the award. We reflect the excess tax benefits related to stock option exercises as financing cash flows. Share-based compensation expense for 2015, 2014 and 2013 was $11.8 million, $5.6 million and $6.5 million, respectively, and the total income tax benefit recognized for these expenses was $4.7 million, $2.0 million and $2.5 million, respectively.

Net (loss) income per share attributable to Amedisys, Inc. common stockholders, calculated on the treasury stock method, is based on the weighted average number of shares outstanding during the period. The following table sets forth, for the periods indicated, shares used in our computation of the weighted-average shares outstanding, which are used to calculate our basic and diluted net earnings attributable to Amedisys, Inc. common stockholders (amounts in thousands):

		For the Years Ended December 31,
		2015	2014	2013
Weighted average number of shares outstanding - basic		33,018	32,301	31,247
Effect of dilutive securities:
	Stock options	0	1	0
	Non-vested stock and stock units	0	521	0
Weighted average number of shares outstanding - diluted		33,018	32,823	31,247
Anti-dilutive securities		922	106	688

We expense advertising costs as incurred. Advertising expense for 2015, 2014 and 2013 was $6.9 million, $4.7 million and $3.9 million, respectively.

In May 2014, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2014-09, Revenue from Contracts with Customers (Topic 606), which requires an entity to recognize the amount of revenue for which it expects to be entitled for the transfer of promised goods or services to customers. The ASU will replace most existing revenue recognition guidance in U.S. GAAP. In August 2015, the FASB issued ASU 2015-14, Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date, to defer the effective date of the standard from January 1, 2017, to January 1, 2018, with an option that permits companies to adopt the standard as early as the original effective date. The new ASU reflects the decisions reached by the FASB at its meeting in July 2015. Early application prior to the original effective date is not permitted. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is evaluating the effect that ASU 2014-09 and ASU 2015-14 will have on its consolidated financial statements and related disclosures, its transition method and the effect of the standard on its ongoing financial reporting.

In April 2015, the FASB issued ASU 2015-03, Interest - Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs. The amendments in this ASU require that debt issuance costs related to a recognized debt liability be presented in the balance sheet as a direct deduction from the carrying amount of that debt liability, consistent with debt discounts. The recognition and measurement guidance for debt issuance costs are not affected by the amendments in this ASU. ASU 2015-03 is effective for annual and interim periods beginning on or after December 15, 2015. As of December 31, 2015, we have $3.4 million of unamortized debt issuance costs that would be reclassified from a long-term asset to a reduction in the carrying amount of our debt.

In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes (Topic 740), which simplifies the presentation of deferred income taxes. This ASU requires that deferred tax assets and liabilities be classified as noncurrent in the balance sheet. The current requirement that deferred tax assets and liabilities be offset and presented as a single amount was not affected by the amendments in ASU 2015-17. The ASU is effective for annual and interim periods beginning on or after December 15, 2016. Early adoption is permitted. We have chosen to early adopt this ASU on a prospective basis. Adoption of this ASU resulted in a reclassification of our net current deferred tax liability to the net noncurrent deferred tax asset in our consolidated balance sheet as of December 31, 2015. Prior periods were not retrospectively adjusted.

In February 2016, the FASB issued ASU 2016-02, Leases (Topic 842), which will require lessees to recognize a lease liability and right-of-use asset for all leases (with the exception of short-term leases) at the commencement date. The ASU is effective for annual and interim periods beginning on or after December 15, 2018. Early adoption is permitted. The standard requires a modified retrospective transition method which requires application of the new guidance for all periods presented. The Company is evaluating the effect that ASU 2016-02 will have on its consolidated financial statements and related disclosures and the effect of the standard on its ongoing financial reporting.