Claire Hermsen, MD
NPI 1225723208 · Internal Medicine Physician · Madison, WI
Enrolled with Medicare as Order and Referring Only - Ophthalmology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Claire Hermsen, MD is a Internal Medicine Physician provider in Madison, WI (NPI 1225723208).
Provider details
- NPI number
- 1225723208
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 100346 (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
3 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 · 1 distinct drug on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Neomycin/Polymyxin B/Dexamethabrand: Neomycin-Polymyxin-Dexameth | 48 | 38 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-04-06
- Last updated
- 2023-06-28
- Certified
- 2023-06-28
Frequently asked questions
- What is Claire Hermsen's NPI number?
- Claire Hermsen's National Provider Identifier (NPI) is 1225723208, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Claire Hermsen's specialty?
- Claire Hermsen is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Claire Hermsen located?
- Claire Hermsen's practice location on file with NPPES is 600 Highland Ave, Madison, WI 53792-1465.
- What is Claire Hermsen's phone number?
- The practice phone number listed in the NPPES registry for Claire Hermsen is (608) 263-6400.
- Does Claire Hermsen accept Medicare?
- Claire Hermsen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Claire Hermsen's NPI active?
- Yes — Claire Hermsen's NPI (1225723208) is active in the NPPES registry as of the last update on 2023-06-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.