SEC 1745
(02-02)

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Under the Securities Exchange Act of 1934
(Amendment No. 1)*

Pharsight Corporation

(Name of Issuer)

Common Stock

(Title of Class of Securities)

71721Q 10 1

(CUSIP Number)

December 31, 2002

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

[ ]	Rule 13d-1(b)
[ ]	Rule 13d-1(c)
[ X ]	Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

CUSIP No. 71721Q 10 1
	1.	Names of Reporting Persons. I.R.S. Identification Nos. of above persons (entities only) Arthur H. Reidel

	2.	Check the Appropriate Box if a Member of a Group (See Instructions)
		(a)
		(b)

	3.	SEC Use Only

	4.	Citizenship or Place of Organization U.S.A.

Number of Shares Beneficially Owned by Each Reporting Person With			5.	Sole Voting Power 1,511,126*

			6.	Shared Voting Power 0

			7.	Sole Dispositive Power 1,511,126*

			8.	Shared Dispositive Power 0

	9.	Aggregate Amount Beneficially Owned by Each Reporting Person 1,511,126*

	10.	Check Box if the Aggregate Amount in Row (9) Excludes Certain Shares (See Instructions)

	11.	Percent of Class Represented by Amount in Row (9) 8.0%

	12.	Type of Reporting Person (See Instructions) IN

* Includes 548,776 shares issuable pursuant to options to purchase common stock exercisable within 60 days of December 31, 2002.

Item 1.
		(a)		Name of Issuer Pharsight Corporation
		(b)		Address of Issuer's Principal Executive Offices 800 West El Camino Real, Suite 200 Mountain View, CA 94040

Item 2.
		(a)		Name of Person Filing Arthur H. Reidel
		(b)		Address of Principal Business Office or, if none, Residence 800 West El Camino Real, Suite 200 Mountain View, CA 94040
		(c)		Citizenship U.S.A.
		(d)		Title of Class of Securities Common Stock
		(e)		CUSIP Number 71721Q 10 1

Item 3.		If this statement is filed pursuant to §§240.13d-1(b), or 240.13d-2(b) or (c), check whether the person filing is a: Not Applicable.
Item 4.	Ownership
Provide the following information regarding the aggregate number and percentage of the class of securities of the issuer identified in Item 1.
			(a)		Amount beneficially owned: 1,511,126 (includes 584,776 shares issuable pursuant to options to purchase common stock exercisable within 60 days of December 31, 2002)
			(b)		Percent of class: 8.0%
			(c)		Number of shares as to which the person has:
					(i)	Sole power to vote or to direct the vote 1,511,126 (includes 584,776 shares issuable pursuant to options to purchase common stock exercisable within 60 days of December 31, 2002)
					(ii)	Shared power to vote or to direct the vote 0
					(iii)	Sole power to dispose or to direct the disposition of 1,511,126 (includes 584,776 shares issuable pursuant to options to purchase common stock exercisable within 60 days of December 31, 2002)
					(iv)	Shared power to dispose or to direct the disposition of 0

Item 5.			Ownership of Five Percent or Less of a Class
Not Applicable.

Item 6.			Ownership of More than Five Percent on Behalf of Another Person
Not Applicable.

Item 7.			Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company
Not Applicable.

Item 8.	Identification and Classification of Members of the Group
Not Applicable.

Item 9.	Notice of Dissolution of a Group
Not Applicable.

Item 10.	Certification
Not Applicable.

Signature

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

	1/30/03
	Date
	/s/ Arthur H. Reidel
	Signature
	Arthur H. Reidel
	Name/Title