Katherine Carol Thomas, MD
Internal Medicine Physician · Bakersfield, CA
Katherine Carol Thomas, MD is an internal medicine physician with a practice address in Bakersfield, California, and NPI 1033555354, issued on May 14, 2013. Check the license (California A135391, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Katherine Carol Thomas
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A135391 CA
Self-reported in NPPES; status is on the state search - Practice location
- 420 34TH St, Bakersfield, CA 93301
- Phone
- (661) 327-5350
- Enumerated
- May 14, 2013
- Record last updated
- Feb 11, 2026
- Fax
- (661) 321-9803
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 420 34TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Katherine Carol Thomas in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A135391Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average internal medicine physician in 2024
120 Medicare Part D claims for 67 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone11 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.
The MIPS final score for 2023 (Medicare payment program): 96.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $41.82
2 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 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.
Katherine Carol Thomas among 17,696 internal medicine physician records in California
Katherine Carol Thomas, MD 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. Its NPI, issued in 2013, is newer than 71% of them.
- NPI issued2013 · 71% of these records are older, 26% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 63% of these records are
- Record last updated2026 · 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).
214 internal medicine physician records list a practice address in Bakersfield
They are 214 of the 11,539 NPPES records with a practice address in Bakersfield, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Bakersfield → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jennifer Abraham, MDBakersfield, CA 933011285650259
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- Rosie Boparai, MDBakersfield, CA 933011740226398
- Kevork Bouldoukian, M.D.Bakersfield, CA 933011720020464
- Chung- Kwang Chen, MDBakersfield, CA 933011083610273
- David Dougherty, M.D.Bakersfield, CA 933011205858917
- Jeffery Freesemann, MDBakersfield, CA 933011336156488
- Fakhruddin Hasta, M.D.Bakersfield, CA 933011316974694
Common questions
What is Katherine Carol Thomas, MD's NPI number?
Katherine Carol Thomas, MD's National Provider Identifier (NPI) is 1033555354, issued on May 14, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Katherine Carol Thomas, MD located?
The NPPES record lists a practice address at 420 34TH St, Bakersfield, CA, 93301. Phone: (661) 327-5350. Providers update this record themselves, so call before visiting.
How can I verify Katherine Carol Thomas, MD's license?
NPPES lists California license number A135391, 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 Katherine Carol Thomas, MD prescribe under Medicare Part D?
In 2024, Katherine Carol Thomas, MD had 120 Medicare Part D claims for 67 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Katherine Carol Thomas, MD's MIPS final score?
The 2023 MIPS final score is 96.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.