Registry data as of Aug 27, 2026

Stephen Allison, M.D.

Psychiatry Physician · Greenbrae, CA

Stephen Allison, M.D. is a psychiatry physician with a practice address in Greenbrae, California, and NPI 1023336294, issued on May 12, 2010. Check the license (California A118576, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, loaded Aug 27, 2026 · Medicare files 2023 and 2024 · method · Verify with CMS →

NPPES recordas of Aug 27, 2026
1023336294
Name
Stephen Allison
Credential
M.D.
Primary taxonomy
Psychiatry Physician 2084P0800X
License number
A118576 CA
Self-reported in NPPES; status is on the state search
Practice location
250 Bon Air RD, Greenbrae, CA 94904
Phone
(415) 925-7663
Enumerated
May 12, 2010
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
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Also registered at 250 Bon Air RD

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

  1. Lisa Abrahams, MFTMarriage & Family Therapist1184738445
  2. Jory Adam, PA-CSurgical Physician Assistant1922269521
  3. Samuel Adams, MDInternal Medicine Physician1497785034
  4. Barbara Addleman, RNRegistered Nurse1053551267
  5. Linda Alexander, RNPsychiatric/Mental Health Registered Nurse1205589405
  6. Maxwell AlikinneyCounselor1538668728

Verify Stephen Allison in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A118576
    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.

Statewide context: the Medical Board of California reported 374 disciplinary actions in FY 2022-23. California discipline data →

92% fewer Medicare Part D claims than the average psychiatry physician in 2024

76 Medicare Part D claims for 16 beneficiaries, against an average of 1,010 among the 32,287 providers of this specialty who prescribed in Part D.

  1. Stephen Allison76
  2. Specialty average1,010

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.

One hospital or facility affiliation

  1. Regents Univ OF California UcsfSan Francisco, CA

Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

16 psychiatry physician records list a Greenbrae practice address

They are 16 of the 727 NPPES records with a Greenbrae practice address, and 7,890 psychiatry physician records in California.

Other psychiatry physician records in California

  1. Nancy Aaen, MDNapa, CA1609816669
  2. Criselda Abad-Santos, M.D.Woodland Hills, CA1760461826
  3. Mekabiz Abaian, MDSan Bernardino, CA1891090163
  4. Kafia Abbasi, M.D.French Camp, CA1215114897
  5. Michele Abbasi, M.D.Westlake Village, CA1093940330
  6. Zohaib AbbasiMartinez, CA1013392224
  7. Chester Abbott, M.D.Pasadena, CA1053442186
  8. Nancy Abdelmalak, M.D.Elk Grove, CA1912137498
  9. Ezzat Abdelmalek, M.DDana Point, CA1992828826
  10. Ahmed AbdelrazekSacramento, CA1669092128

Common questions

What is Stephen Allison, M.D.'s NPI number?

Stephen Allison, M.D.'s National Provider Identifier (NPI) is 1023336294, issued on May 12, 2010. An NPI identifies a provider in billing; it is not a license.

Where is Stephen Allison, M.D. located?

The NPPES record lists a practice address at 250 Bon Air RD, Greenbrae, CA, 94904. Phone: (415) 925-7663. Providers update this record themselves, so call before visiting.

How can I verify Stephen Allison, M.D.'s license?

NPPES lists California license number A118576, 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 Stephen Allison, M.D. prescribe under Medicare Part D?

In 2024, Stephen Allison, M.D. had 76 Medicare Part D claims for 16 beneficiaries; the average among psychiatry physician prescribers was 1,010. Part D covers Medicare prescriptions only.

Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.

Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.