Margaret Holmes, MD
NPI 1427071901 · Internal Medicine Physician · Milwaukee, WI
Enrolled with Medicare as Order and Referring Only - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Holmes, MD is a Internal Medicine Physician provider in Milwaukee, WI (NPI 1427071901).
Provider details
- NPI number
- 1427071901
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
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
19 yrs in NPPES registry
- Profile completeness38% of score
83% 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) |
|---|---|
| Atorvastatin Calcium | 28 |
| Tamsulosin Hcl | 25 |
| Amlodipine Besylate | 18 |
| Losartan Potassium | 16 |
| Gabapentin | 15 |
| Levothyroxine Sodium | 15 |
| Omeprazole | 15 |
| Duloxetine Hcl | 12 |
| Fluticasone Propionate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-25
- Last updated
- 2007-07-08
Frequently asked questions
- What is Margaret Holmes's NPI number?
- Margaret Holmes's National Provider Identifier (NPI) is 1427071901, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Holmes's specialty?
- Margaret Holmes is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Holmes located?
- Margaret Holmes's practice location on file with NPPES is 5000 W National Ave, Milwaukee, WI 53295-0001.
- What is Margaret Holmes's phone number?
- The practice phone number listed in the NPPES registry for Margaret Holmes is (414) 384-2000.
- Does Margaret Holmes accept Medicare?
- Margaret Holmes is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Holmes's NPI active?
- Yes — Margaret Holmes's NPI (1427071901) 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.