Steven Floyd Hamman, M.D.
Internal Medicine Physician · Los Altos, CA
Steven Floyd Hamman, M.D. is an internal medicine physician with a practice address in Los Altos, California, and NPI 1306289004, issued on Apr 11, 2013. Check the license (California GFE30708, as entered in NPPES) on the Medical Board of California; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Steven Floyd Hamman
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- GFE30708 CA
Self-reported in NPPES; status is on the state search - Practice location
- 585 Deodara Dr, Los Altos, CA 94024
- Phone
- (650) 903-0843
- Enumerated
- Apr 11, 2013
- Record last updated
- Apr 11, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (206) 201-6783
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Steven Floyd Hamman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license GFE30708Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Steven Floyd Hamman among 17,696 internal medicine physician records in California
Steven Floyd Hamman, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 2013, is newer than 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileNo · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2013 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
29 internal medicine physician records list a practice address in Los Altos
They are 29 of the 718 NPPES records with a practice address in Los Altos, and 17,696 internal medicine physician records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 17,696 in California → Every provider in Los Altos → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Simon Humphries, MDLos Altos, CA 940241023149440
- Steven Natterstad, M.D.Los Altos, CA 940241710048921
- Patricia Sitnitsky, M.D.Los Altos, CA 940241790896231
- Susan Sorensen, MDLos Altos, CA 940241366523862
- Charles Tuchinda, M.D.Los Altos, CA 940241063641702
- Susan Garay, MDMenlo Park, CA 940251437114006
- F McDowell, MDMenlo Park, CA 940251154384576
- Eileen Moy, MDMenlo Park, CA 940251083617583
Common questions
What is Steven Floyd Hamman, M.D.'s NPI number?
Steven Floyd Hamman, M.D.'s National Provider Identifier (NPI) is 1306289004, issued on Apr 11, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Steven Floyd Hamman, M.D. located?
The NPPES record lists a practice address at 585 Deodara Dr, Los Altos, CA, 94024. Phone: (650) 903-0843. Providers update this record themselves, so call before visiting.
How can I verify Steven Floyd Hamman, M.D.'s license?
NPPES lists California license number GFE30708, 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.
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.