Thomas Byron Alan, M.D.
Internal Medicine Physician · Davis, CA
Thomas Byron Alan, M.D. is an internal medicine physician with a practice address in Davis, California, and NPI 1235115635, issued on Dec 16, 2005. Check the license (California A85006, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Thomas Byron Alan
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A85006 CA
A08506 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2660 W Covell Blvd, Davis, CA 95616
- Phone
- (530) 747-3000
- Enumerated
- Dec 16, 2005
- Record last updated
- Jun 12, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (530) 747-3080
- Medicare enrollment
- Enrolled (PECOS I20040512001536); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 2660 W Covell Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Anca Knoepfler, M.D.Internal Medicine Physician1912961426
Verify Thomas Byron Alan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A85006Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average internal medicine physician in 2024
6,820 Medicare Part D claims for 844 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims. 213 claims were for opioids.
Most prescribed
- Atorvastatin Calcium409 claims
- Levothyroxine Sodium276 claims
- Amlodipine Besylate244 claims
- Lisinopril219 claims
- Tamsulosin Hcl202 claims
- Gabapentin188 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.
Bills Medicare through one group practice
- Regents OF The University OF CaliforniaSacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Thomas Byron Alan among 17,696 internal medicine physician records in California
Thomas Byron Alan, 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. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 95% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1996 · median 2004 among the 11,065 with a school on file
- Record last updated2020 · 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).
33 internal medicine physician records list a practice address in Davis
They are 33 of the 1,711 NPPES records with a practice address in Davis, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Davis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Allison Alcalay, M.D.Davis, CA 956161457334716
- Richard Blohm, M.D.Davis, CA 956161821185802
- David Dasilva, M.D.Davis, CA 956161316967938
- Peter Droubay, MDDavis, CA 956161699886200
- David Dycaico, MDDavis, CA 956161033297734
- Michelle Famula, M.D.Davis, CA 956161730256843
- Dermet Fong, MDDavis, CA 956161821169012
- Anca Knoepfler, M.D.Davis, CA 956161912961426
Common questions
What is Thomas Byron Alan, M.D.'s NPI number?
Thomas Byron Alan, M.D.'s National Provider Identifier (NPI) is 1235115635, issued on Dec 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Thomas Byron Alan, M.D. located?
The NPPES record lists a practice address at 2660 W Covell Blvd, Davis, CA, 95616. Phone: (530) 747-3000. Providers update this record themselves, so call before visiting.
How can I verify Thomas Byron Alan, M.D.'s license?
NPPES lists California license number A85006, 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 Byron Alan, M.D. prescribe under Medicare Part D?
In 2024, Thomas Byron Alan, M.D. had 6,820 Medicare Part D claims for 844 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.