Ann Merkow, M.D.
NPI 1528035383 · Internal Medicine Physician · West Allis, WI
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ann Merkow, M.D. is a Internal Medicine Physician provider in West Allis, WI (NPI 1528035383).
Provider details
- NPI number
- 1528035383
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- License
- 27275-020 (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
20 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 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amlodipine Besylate | 45 | 11 |
| Losartan Potassium | 41 | 13 |
| Atorvastatin Calcium | 35 | 13 |
| Famotidine | 27 | — |
| Metoprolol Tartrate | 26 | — |
| Montelukast Sodium | 23 | — |
| Sertraline Hcl | 21 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-01
- Last updated
- 2007-07-08
Frequently asked questions
- What is Ann Merkow's NPI number?
- Ann Merkow's National Provider Identifier (NPI) is 1528035383, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ann Merkow's specialty?
- Ann Merkow is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Ann Merkow located?
- Ann Merkow's practice location on file with NPPES is 555 S 108th St, West Allis, WI 53214-1100.
- What is Ann Merkow's phone number?
- The practice phone number listed in the NPPES registry for Ann Merkow is (414) 566-6400.
- Does Ann Merkow accept Medicare?
- Ann Merkow is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ann Merkow's NPI active?
- Yes — Ann Merkow's NPI (1528035383) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.