Thomas Alan, M.D.
NPI 1235115635 · Internal Medicine Physician · Davis, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Alan, M.D. is a Internal Medicine Physician provider in Davis, CA (NPI 1235115635).
Provider details
- NPI number
- 1235115635
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A08506 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,484 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 596 | $97 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 523 | $78 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 96 | $50 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 92 | $17 |
| Administration of Influenza Virus VaccineG0008 | 81 | $34 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 148 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 409 | 132 |
| Levothyroxine Sodium | 276 | 83 |
| Amlodipine Besylate | 244 | 79 |
| Lisinopril | 219 | 71 |
| Tamsulosin Hcl | 202 | 60 |
| Gabapentin | 188 | 66 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-16
- Last updated
- 2020-06-12
- Certified
- 2020-06-12
Frequently asked questions
- What is Thomas Alan's NPI number?
- Thomas Alan's National Provider Identifier (NPI) is 1235115635, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Alan's specialty?
- Thomas Alan is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Alan located?
- Thomas Alan's practice location on file with NPPES is 2660 W Covell Blvd, Davis, CA 95616-5645.
- What is Thomas Alan's phone number?
- The practice phone number listed in the NPPES registry for Thomas Alan is (530) 747-3000.
- Does Thomas Alan accept Medicare?
- Thomas Alan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Alan's NPI active?
- Yes — Thomas Alan's NPI (1235115635) is active in the NPPES registry as of the last update on 2020-06-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.