Thomas Hay Cromwell, MD
Anesthesiology Physician · San Francisco, CA
Thomas Hay Cromwell, MD is an anesthesiology physician with a practice address in San Francisco, California, and NPI 1962458570, issued on May 25, 2006. Check the license (California C31236, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas Hay Cromwell
- Credential
- MD
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- C31236 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2333 Buchanan St, San Francisco, CA 94115
- Phone
- (415) 923-3288
- Enumerated
- May 25, 2006
- Record last updated
- Aug 5, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 00C312360 CA
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 7,571 in California → Look up another NPI →
Also registered at 2333 Buchanan St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Thomas Hay Cromwell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license C31236Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
95% fewer Medicare Part D claims than the average anesthesiology physician in 2024
19 Medicare Part D claims, against an average of 402 among the 4,319 providers of this specialty who prescribed in Part D. Brand-name drugs were 58% of claims.
Most prescribed
- Latanoprost11 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.
Thomas Hay Cromwell among 7,571 anesthesiology physician records in California
Thomas Hay Cromwell, MD is one of 7,571 anesthesiology physician records with a practice address in California. 71% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 53% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 64% of these records are
- Record last updated2007 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
499 anesthesiology physician records list a practice address in San Francisco
They are 499 of the 38,143 NPPES records with a practice address in San Francisco, and 7,571 anesthesiology physician records in California.
All 7,571 in California → Every provider in San Francisco → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Bryan Andrews, MDSan Francisco, CA 941151609954239
- Wayne Bellows, MDSan Francisco, CA 941151528146115
- Gregory Chang, MDSan Francisco, CA 941151801974407
- Kathryn Demas, MDSan Francisco, CA 941151679651277
- Olaf Holoyda, MDSan Francisco, CA 941151548348139
- John Howse, MDSan Francisco, CA 941151699853291
- Kenneth Kampman, MDSan Francisco, CA 941151124106711
- Jeffrey Levy, MDSan Francisco, CA 941151487693909
Common questions
What is Thomas Hay Cromwell, MD's NPI number?
Thomas Hay Cromwell, MD's National Provider Identifier (NPI) is 1962458570, issued on May 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Hay Cromwell, MD located?
The NPPES record lists a practice address at 2333 Buchanan St, San Francisco, CA, 94115. Phone: (415) 923-3288. Providers update this record themselves, so call before visiting.
How can I verify Thomas Hay Cromwell, MD's license?
NPPES lists California license number C31236, 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 Thomas Hay Cromwell, MD prescribe under Medicare Part D?
In 2024, Thomas Hay Cromwell, MD had 19 Medicare Part D claims; the average among anesthesiology physician prescribers was 402. 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.