Thomas Gahl, MD
NPI 1942535711 · Family Medicine Physician · Milwaukee, WI
Enrolled with Medicare as Order and Referring Only - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Thomas Gahl, MD is a Family Medicine Physician provider in Milwaukee, WI (NPI 1942535711).
Provider details
- NPI number
- 1942535711
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 55015 (WI)
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
16 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 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 187 | 54 |
| Losartan Potassium | 137 | 40 |
| Hydrochlorothiazide | 82 | 25 |
| Rosuvastatin Calcium | 75 | 24 |
| Omeprazole | 69 | 18 |
| Semaglutidebrand: Ozempic | 62 | 14 |
| Amlodipine Besylate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-10-12
- Last updated
- 2015-06-02
Frequently asked questions
- What is Thomas Gahl's NPI number?
- Thomas Gahl's National Provider Identifier (NPI) is 1942535711, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Thomas Gahl's specialty?
- Thomas Gahl is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Thomas Gahl located?
- Thomas Gahl's practice location on file with NPPES is 633 E Mason St, Milwaukee, WI 53202-3813.
- What is Thomas Gahl's phone number?
- The practice phone number listed in the NPPES registry for Thomas Gahl is (414) 665-8400.
- Does Thomas Gahl accept Medicare?
- Thomas Gahl is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Thomas Gahl's NPI active?
- Yes — Thomas Gahl's NPI (1942535711) is active in the NPPES registry as of the last update on 2015-06-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.