NPPES file of Aug 9, 2026

Alan J. Spain, M.D.

Emergency Medicine Physician · Greenbrae, CA

Alan J. Spain, M.D. is an emergency medicine physician with a practice address in Greenbrae, California, and NPI 1548282825, issued on Jul 24, 2006. Check the license (California G50898, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1548282825
Name
Alan J. Spain
Credential
M.D.
Primary taxonomy
Emergency Medicine Physician 207P00000X
License number
G50898 CA
Self-reported in NPPES; status is on the state search
Practice location
250 Bon Air RD, Greenbrae, CA 94904
Phone
(415) 925-7000
Enumerated
Jul 24, 2006
Record last updated
Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
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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8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →

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, MDHospitalist Physician1497785034
  4. Barbara Addleman, RNRegistered Nurse1053551267
  5. Linda Alexander, RNPsychiatric/Mental Health Registered Nurse1205589405
  6. Maxwell AlikinneyCounselor1538668728

Verify Alan J. Spain in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license G50898    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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Alan J. Spain among 7,751 emergency medicine physician records in California

Alan J. Spain, M.D. is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2006, is newer than 4% of them.

  • NPI issued2006 · 4% of these records are older, 60% newer
  • In a Medicare fileNo · 81% of these records are
  • In the CMS Doctors and Clinicians fileNo · 59% of these records are
  • Record last updated2007 · 59% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

12 emergency medicine physician records list a practice address in Greenbrae

They are 12 of the 727 NPPES records with a practice address in Greenbrae, and 7,751 emergency medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.

All 7,751 in California → Every provider in Greenbrae → Emergency Medicine Physician nationwide →

The 8 emergency medicine physician records with the nearest ZIP codes

  1. Arthur Cohn, M.D.Greenbrae, CA 949041033137831
  2. David Duffy, M.D.Greenbrae, CA 949041861414203
  3. Tami Gash-Kim, M.DGreenbrae, CA 949041164440848
  4. Lara Kulchycki, M.D.Greenbrae, CA 949041558317032
  5. Robert Riner, M.D.Greenbrae, CA 949041912929290
  6. Carl Spitzer, M.D.Greenbrae, CA 949041881612455
  7. Sean Tiret, MDGreenbrae, CA 949041770043119
  8. Katherine Tran, MDGreenbrae, CA 949041265992606

Common questions

What is Alan J. Spain, M.D.'s NPI number?

Alan J. Spain, M.D.'s National Provider Identifier (NPI) is 1548282825, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Alan J. Spain, M.D. located?

The NPPES record lists a practice address at 250 Bon Air RD, Greenbrae, CA, 94904. Phone: (415) 925-7000. Providers update this record themselves, so call before visiting.

How can I verify Alan J. Spain, M.D.'s license?

NPPES lists California license number G50898, 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.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.