Katherine Gregory, M.D.
Specialist · San Francisco, CA
Katherine Gregory, M.D. is a specialist with a practice address in San Francisco, California, and NPI 1902954308, issued on Jan 8, 2007. Check the license (California G80994, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Katherine Gregory
- Credential
- M.D.
- Primary taxonomy
- Specialist 174400000X
- License number
- G80994 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3905 Sacramento St, San Francisco, CA 94118
- Phone
- (415) 379-7949
- Enumerated
- Jan 8, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (415) 379-7950
- Medicare enrollment
- Enrolled (PECOS I20070730000375); accepts Medicare assignment
- Medical or professional school
- University Of California, Davis School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 3905 Sacramento St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine Gregory in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license G80994Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average specialist in 2024
351 Medicare Part D claims for 109 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Estradiol103 claims
- Progesterone42 claims
- Estradiol (Once Weekly)32 claims
- Estradiol (Twice Weekly)21 claims
- Medroxyprogesterone Acetate17 claims
- Valacyclovir12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $390.29
19 payments; by number, the most common kind was food and beverage; the largest payer was Mayne Pharma Commercial LLC. The 5,844 providers of this specialty with any payment received $4,760.79 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Katherine Gregory among 5,749 specialist records in California
Katherine Gregory, M.D. is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 44% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated1990 · median 1989 among the 1,075 with a school on file
- Record last updated2007 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
666 specialist records list a practice address in San Francisco
They are 666 of the 38,143 NPPES records with a practice address in San Francisco, and 5,749 specialist records in California.
All 5,749 in California → Every provider in San Francisco → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Allison Atwood, MS, OTR/LSan Francisco, CA 941181174804363
- Kanglin ChuangSan Francisco, CA 941181396116646
- Katherine Crosby, M.D.San Francisco, CA 941181033122320
- Amina DuranaSan Francisco, CA 941181346724382
- Alyssa EstradaSan Francisco, CA 941181669031258
- Elizabeth Galaif, M.D.San Francisco, CA 941181558420430
- Stephanie JoeSan Francisco, CA 941181376739862
- Amir Rafii, MDSan Francisco, CA 941181134103906
Common questions
What is Katherine Gregory, M.D.'s NPI number?
Katherine Gregory, M.D.'s National Provider Identifier (NPI) is 1902954308, issued on Jan 8, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Gregory, M.D. located?
The NPPES record lists a practice address at 3905 Sacramento St, San Francisco, CA, 94118. Phone: (415) 379-7949. Providers update this record themselves, so call before visiting.
How can I verify Katherine Gregory, M.D.'s license?
NPPES lists California license number G80994, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Katherine Gregory, M.D. prescribe under Medicare Part D?
In 2024, Katherine Gregory, M.D. had 351 Medicare Part D claims for 109 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.