Margaret Gray, MD
NPI 1528509759 · Family Medicine Physician · Madison, WI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Gray, MD is a Family Medicine Physician provider in Madison, WI (NPI 1528509759).
Provider details
- NPI number
- 1528509759
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 61118802 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
9 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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) |
|---|---|
| Apixabanbrand: Eliquis | 12 |
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
Additional practice locations (2)
- 1402b Sigler StNashville, TN 37203-4318Phone: (270) 302-1573
- 7102 Mineral Point RdMadison, WI 53717-1706Phone: (608) 828-7676
Registry dates
- Enumerated
- 2017-03-20
- Last updated
- 2025-12-01
- Certified
- 2025-12-01
Frequently asked questions
- What is Margaret Gray's NPI number?
- Margaret Gray's National Provider Identifier (NPI) is 1528509759, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Gray's specialty?
- Margaret Gray is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Gray located?
- Margaret Gray's practice location on file with NPPES is 2402 Winnebago St, Madison, WI 53704-5341.
- What is Margaret Gray's phone number?
- The practice phone number listed in the NPPES registry for Margaret Gray is (608) 828-7603.
- Does Margaret Gray accept Medicare?
- Margaret Gray is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Gray's NPI active?
- Yes — Margaret Gray's NPI (1528509759) is active in the NPPES registry as of the last update on 2025-12-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.