Thomas Dowlearn, MD, MBA
NPI 1639756927 · Family Medicine Physician · Santa Rosa, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Dowlearn, MD, MBA is a Family Medicine Physician provider in Santa Rosa, CA (NPI 1639756927).
Provider details
- NPI number
- 1639756927
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, MBA
- Sex
- Male
- Sole proprietor
- No
- License
- 187281 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
5 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 56 | 27 |
| Lisinopril | 37 | 14 |
| Metformin Hclbrand: Metformin Hcl Er | 20 | — |
| Losartan Potassium | 20 | — |
| Hydrochlorothiazide | 18 | — |
| Losartan/Hydrochlorothiazidebrand: Losartan-Hydrochlorothiazide | 17 | — |
| Gabapentin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-03-24
- Last updated
- 2024-10-14
- Certified
- 2024-10-14
Frequently asked questions
- What is Thomas Dowlearn's NPI number?
- Thomas Dowlearn's National Provider Identifier (NPI) is 1639756927, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Dowlearn's specialty?
- Thomas Dowlearn is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Dowlearn located?
- Thomas Dowlearn's practice location on file with NPPES is 401 Bicentennial Way, Santa Rosa, CA 95403-2149.
- What is Thomas Dowlearn's phone number?
- The practice phone number listed in the NPPES registry for Thomas Dowlearn is (707) 393-4000.
- Does Thomas Dowlearn accept Medicare?
- Thomas Dowlearn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Dowlearn's NPI active?
- Yes — Thomas Dowlearn's NPI (1639756927) is active in the NPPES registry as of the last update on 2024-10-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.