Thomas Martin Hemmen, M.D./PH.D
Vascular Neurology Physician · San Diego, CA
Thomas Martin Hemmen, M.D./PH.D is a vascular neurology physician with a practice address in San Diego, California, and NPI 1902821945, issued on Jul 12, 2006. Check the license (California A72645, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas Martin Hemmen
- Credential
- M.D./PH.D
- Primary taxonomy
- Vascular Neurology Physician 2084V0102X
- License number
- A72645 CA
Self-reported in NPPES; status is on the state search - Practice location
- 200 W Arbor Dr, San Diego, CA 92103
- Phone
- (800) 926-8273
- Enumerated
- Jul 12, 2006
- Record last updated
- Jul 23, 2024
- Fax
- (888) 539-8781
- Medicaid ID
- 00A726450 CA
- Medicare enrollment
- Enrolled (PECOS I20040824000829); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest vascular neurology physician records → All 74 in California → Look up another NPI →
Also registered at 200 W Arbor Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alison A'Court, MDAnesthesiology Physician1912218199
- Benjamin Abbadessa, M.D.Colon & Rectal Surgery Physician1255593612
- Geraldine Abcede, RNCertified Registered Nurse Anesthetist1982384046
- Joseph Abdelmalek, M.DNephrology Physician1740485531
- Kristy AbelCertified Registered Nurse Anesthetist1962113035
- Paula Abeleda, NPFamily Nurse Practitioner1558945022
Verify Thomas Martin Hemmen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A72645Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
84% fewer Medicare Part D claims than the average vascular neurology physician in 2024
44 Medicare Part D claims for 12 beneficiaries, against an average of 270 among the 598 providers of this specialty who prescribed in Part D. Brand-name drugs were 41% of claims.
Most prescribed
- Eliquis12 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.
Industry payments in 2024: $33.33
1 payment: food and beverage; the largest payer was Genentech USA, Inc. The 461 providers of this specialty with any payment received $3,770.65 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Regents OF The University OF CaliforniaSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Martin Hemmen among 74 vascular neurology physician records in California
Thomas Martin Hemmen, M.D./PH.D is one of 74 vascular neurology physician records with a practice address in California. 89% 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 1% of them.
- NPI issued2006 · 1% of these records are older, 82% newer
- In a Medicare fileYes · 89% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated1994 · median 2009 among the 61 with a school on file
- Record last updated2024 · 32% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084V0102X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Vascular Neurology Physician providers in California
There are 74 vascular neurology physician records in California.
All 74 in California → Every provider in San Diego → Vascular Neurology Physician nationwide →
The 8 vascular neurology physician records with the nearest ZIP codes
- Kunal Agrawal, M.D.San Diego, CA 921031093074122
- Reza Bavarsad Shahripour, MDSan Diego, CA 921031699129668
- Christian Garcia, MDSan Diego, CA 921031134859994
- Brett Meyer, M.D.San Diego, CA 921031316011265
- Royya Modir, M.D.San Diego, CA 921031295909554
- Samuel Yip, M.D,PH.D,FRCPCSan Diego, CA 921031710187638
- Tehmina Salahuddin, M.DPalm Springs, CA 922621942462700
- Muhammad Taqi, M.D.Palm Springs, CA 922621013123280
Common questions
What is Thomas Martin Hemmen, M.D./PH.D's NPI number?
Thomas Martin Hemmen, M.D./PH.D's National Provider Identifier (NPI) is 1902821945, issued on Jul 12, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Martin Hemmen, M.D./PH.D located?
The NPPES record lists a practice address at 200 W Arbor Dr, San Diego, CA, 92103. Phone: (800) 926-8273. Providers update this record themselves, so call before visiting.
How can I verify Thomas Martin Hemmen, M.D./PH.D's license?
NPPES lists California license number A72645, 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 Martin Hemmen, M.D./PH.D prescribe under Medicare Part D?
In 2024, Thomas Martin Hemmen, M.D./PH.D had 44 Medicare Part D claims for 12 beneficiaries; the average among vascular neurology physician prescribers was 270. 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.