NPPES file of Aug 9, 2026

Peter L. Forster, M.D.

Psychiatry Physician · San Francisco, CA

Peter L. Forster, M.D. is a psychiatry physician with a practice address in San Francisco, California, and NPI 1609975309, issued on Sep 21, 2006. Check the license (California G058999, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1609975309
Name
Peter L. Forster
Credential
M.D.
Primary taxonomy
Psychiatry Physician 2084P0800X
License number
G058999 CA
Self-reported in NPPES; status is on the state search
Practice location
211 Gough St, San Francisco, CA 94102
Phone
(415) 551-0520
Enumerated
Sep 21, 2006
Record last updated
Oct 19, 2015 (not updated in 11 years: call before relying on the address or phone)
Fax
(415) 551-0524
Medicare enrollment
Enrolled (PECOS I20070814000562); accepts Medicare assignment
Medical or professional school
University Of California, San Diego School Of Medicine, 1985
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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Also registered at 211 Gough St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Juan Collins, L.AC.Acupuncturist1386888550
  2. Jennifer Cummings, M.D.Psychiatry Physician1447450044
  3. Kristin Felch, PSY.D.Clinical Psychologist1861732570
  4. Cynthia Front, PH.DMarriage & Family Therapist1891014346
  5. Mark Keller, MFTMarriage & Family Therapist1811257884
  6. Steven Kohlstrom, PH.D.Clinical Psychologist1841209251

Verify Peter L. Forster in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G058999
    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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88% fewer Medicare Part D claims than the average psychiatry physician in 2024

115 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.

  1. Peter Forster115
  2. Specialty average1,000

Most prescribed

  1. Propranolol Hcl14 claims
  2. Escitalopram Oxalate12 claims
  3. Dextroamphetamine-Amphetamine11 claims
  4. Lamotrigine11 claims
  5. Lithium Carbonate Er11 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.

The practice group's MIPS final score for 2023 (Medicare payment program): 74.5 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualitynot scored (reweighted)
  2. Costout of 100 · 30%46.7
  3. Promoting interoperabilityout of 100 · 25%76.0
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Bills Medicare through one group practice

  1. University OF California San FranciscoSan Francisco, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Peter L. Forster among 8,673 psychiatry physician records in California

Peter L. Forster, M.D. is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 2% of them.

  • NPI issued2006 · 2% of these records are older, 67% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileYes · 38% of these records are
  • Graduated1985 · median 2005 among the 3,295 with a school on file
  • Record last updated2015 · 54% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

763 psychiatry physician records list a practice address in San Francisco

They are 763 of the 38,143 NPPES records with a practice address in San Francisco, and 8,673 psychiatry physician records in California.

The 8 psychiatry physician records with the nearest ZIP codes

  1. Yates Brown, M.D.San Francisco, CA 941021639275704
  2. George Collyer, MDSan Francisco, CA 941021215025713
  3. Ravi Hariprasad, MDSan Francisco, CA 941021992874036
  4. George Harrison, MDSan Francisco, CA 941021487684965
  5. Naomi Lam, MDSan Francisco, CA 941021346310083
  6. William Quick, MDSan Francisco, CA 941021659438950
  7. Gwendolyn Rothman, MDSan Francisco, CA 941021770525370
  8. Howard Rubin, M.D.San Francisco, CA 941021649354176

Common questions

What is Peter L. Forster, M.D.'s NPI number?

Peter L. Forster, M.D.'s National Provider Identifier (NPI) is 1609975309, issued on Sep 21, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Peter L. Forster, M.D. located?

The NPPES record lists a practice address at 211 Gough St, San Francisco, CA, 94102. Phone: (415) 551-0520. Providers update this record themselves, so call before visiting.

How can I verify Peter L. Forster, M.D.'s license?

NPPES lists California license number G058999, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Peter L. Forster, M.D. prescribe under Medicare Part D?

In 2024, Peter L. Forster, M.D. had 115 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.

What is Peter L. Forster, M.D.'s MIPS final score?

The 2023 MIPS final score is 74.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.

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.