Gregory Hammett, D.O.
Hospitalist Physician · Santa Barbara, CA
Gregory Hammett, D.O. is a hospitalist physician with a practice address in Santa Barbara, California, and NPI 1508266727, issued on Aug 25, 2014. Check the license (California 20A14761, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gregory Hammett
- Credential
- D.O.
- Primary taxonomy
- Hospitalist Physician 208M00000X
- License number
- 20A14761 CA
Self-reported in NPPES; status is on the state search - Practice location
- 317 W Pueblo St, Santa Barbara, CA 93105
- Phone
- (805) 681-7500
- Enumerated
- Aug 25, 2014
- Record last updated
- Mar 6, 2023
- Medicare enrollment
- Enrolled (PECOS I20170829003143); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest hospitalist physician records → All 3,099 in California → Look up another NPI →
Also registered at 317 W Pueblo St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Justin Abraham, M.D., M.B.A.Neurology Physician1225322522
- Hosam Ahmad, M.D.Hospitalist Physician1881846475
- Joseph Aragon, M.D.Interventional Cardiology Physician1023122587
- Hiwot ArayaHospitalist Physician1922427327
- Christina Archer, MS, RDRegistered Dietitian1487178380
- Summer Baird, M.D.Internal Medicine Physician1245727809
Verify Gregory Hammett in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A14761Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
79% fewer Medicare Part D claims than the average hospitalist physician in 2024
110 Medicare Part D claims for 60 beneficiaries, against an average of 521 among the 21,613 providers of this specialty who prescribed in Part D.
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.
Bills Medicare through one group practice
- Sansum ClinicSanta Barbara, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gregory Hammett among 3,099 hospitalist physician records in California
Gregory Hammett, D.O. is one of 3,099 hospitalist physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 61% of them.
- NPI issued2014 · 61% of these records are older, 34% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 81% of these records are
- Graduated2014 · median 2010 among the 2,505 with a school on file
- Record last updated2023 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208M00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hospitalist Physician providers in California
There are 3,099 hospitalist physician records in California.
All 3,099 in California → Every provider in Santa Barbara → Hospitalist Physician nationwide →
The 8 hospitalist physician records with the nearest ZIP codes
- Hosam Ahmad, M.D.Santa Barbara, CA 931051881846475
- Hiwot ArayaSanta Barbara, CA 931051922427327
- Michele Armet, MDSanta Barbara, CA 931051942389275
- Enrico Cerrato, MDSanta Barbara, CA 931051588738108
- Lindsay Katona, D.O.Santa Barbara, CA 931051952752263
- Anh Lam, MDSanta Barbara, CA 931051043328933
- Jeremy Lash, MDSanta Barbara, CA 931051144585514
- Kyle Lemon, M.D.Santa Barbara, CA 931051891897765
Common questions
What is Gregory Hammett, D.O.'s NPI number?
Gregory Hammett, D.O.'s National Provider Identifier (NPI) is 1508266727, issued on Aug 25, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Gregory Hammett, D.O. located?
The NPPES record lists a practice address at 317 W Pueblo St, Santa Barbara, CA, 93105. Phone: (805) 681-7500. Providers update this record themselves, so call before visiting.
How can I verify Gregory Hammett, D.O.'s license?
NPPES lists California license number 20A14761, 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 Gregory Hammett, D.O. prescribe under Medicare Part D?
In 2024, Gregory Hammett, D.O. had 110 Medicare Part D claims for 60 beneficiaries; the average among hospitalist physician prescribers was 521. 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.