Robert P. Mathis, M.D.
Adult Medicine Physician · Santa Barbara, CA
Robert P. Mathis, M.D. is an adult medicine physician with a practice address in Santa Barbara, California, and NPI 1487865671, issued on May 27, 2007. Check the license (California A46123, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Robert P. Mathis
- Credential
- M.D.
- Primary taxonomy
- Adult Medicine Physician 207QA0505X
- License number
- A46123 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1625 State St, Santa Barbara, CA 93101
- Phone
- (805) 569-7100
- Enumerated
- May 27, 2007
- Record last updated
- Jul 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (805) 569-7113
- Entity
- Type 1 · individual
8 nearest adult medicine physician records → All 386 in California → Look up another NPI →
Also registered at 1625 State St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert P. Mathis in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A46123Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average adult medicine physician in 2024
826 Medicare Part D claims for 102 beneficiaries, against an average of 3,002 among the 1,307 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims. 16 claims were for opioids.
Most prescribed
- Liothyronine Sodium127 claims
- Levothyroxine Sodium70 claims
- Hydrocortisone35 claims
- Testosterone Cypionate27 claims
- Azithromycin26 claims
- Np Thyroid23 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.
Robert P. Mathis among 386 adult medicine physician records in California
Robert P. Mathis, M.D. is one of 386 adult medicine physician records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 35% of them.
- NPI issued2007 · 35% of these records are older, 49% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileNo · 48% 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 207QA0505X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Adult Medicine Physician providers in California
There are 386 adult medicine physician records in California.
All 386 in California → Every provider in Santa Barbara → Adult Medicine Physician nationwide →
The 8 adult medicine physician records with the nearest ZIP codes
- Joel Brandt, M.D.Santa Barbara, CA 931091609937374
- Ceferino Quizon, M.DPort Hueneme, CA 930411326346966
- Leland Werner, D.O.Camarillo, CA 930121174596894
- David StegmanVentura, CA 930031710258157
- Jin YuCoalinga, CA 932101588689228
- Evelyn Gomez, MDHanford, CA 932301336408194
- Ney Aung, M.DTulare, CA 932741386613792
- Peter Jared Michael Caballes, MDVisalia, CA 932911770233249
Common questions
What is Robert P. Mathis, M.D.'s NPI number?
Robert P. Mathis, M.D.'s National Provider Identifier (NPI) is 1487865671, issued on May 27, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Robert P. Mathis, M.D. located?
The NPPES record lists a practice address at 1625 State St, Santa Barbara, CA, 93101. Phone: (805) 569-7100. Providers update this record themselves, so call before visiting.
How can I verify Robert P. Mathis, M.D.'s license?
NPPES lists California license number A46123, 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 Robert P. Mathis, M.D. prescribe under Medicare Part D?
In 2024, Robert P. Mathis, M.D. had 826 Medicare Part D claims for 102 beneficiaries; the average among adult medicine physician prescribers was 3,002. 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.