MARGARET GRAY MD
NPI 1528509759
Family Medicine in Madison, WI
About Margaret Gray Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARGARET GRAY MD (NPI 1528509759) is an individual family medicine provider in Madison, Wisconsin, licensed in Wisconsin (85567-20) and active in the NPI registry since March 2017. She is enrolled in Medicare PECOS, is affiliated with University Of Wi Hospitals & Clinics Authority, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 4
Secondary Practice Locations 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Margaret Gray Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Margaret Gray reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Middleton, WI 53562
- Reassigned Medicare billing, Wisconsin enrollment
- 2,832 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Wi Hospitals & Clinics Authority
Acute Care Hospitals · Madison, WIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 53704 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Margaret Gray's NPI number?
The NPI number for Margaret Gray is 1528509759. It was assigned to this individual provider in the NPPES registry on March 20, 2017.
Where is Margaret Gray located?
Margaret Gray practices at 2402 Winnebago St, Madison, WI 53704. The listed phone number is (608) 828-7603.
What is Margaret Gray's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Margaret Gray enrolled in Medicare?
Yes. Margaret Gray is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Margaret Gray's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Margaret Gray reassigns Medicare benefits to University Of Wisconsin Medical Foundation, Inc (Middleton, WI). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Margaret Gray's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Margaret Gray accept?
Health plans from Anthem Blue Cross and Blue Shield, Aspirus Health Plan, Group Health Cooperative-SCW, HealthPartners and Quartz list Margaret Gray as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Margaret Gray affiliated with any hospitals?
According to CMS data, Margaret Gray is affiliated with University Of Wi Hospitals & Clinics Authority.
When was this NPI record last updated?
The NPPES record for Margaret Gray was last updated on July 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Margaret Gray, MD · NPI 1528509759
Family Medicine physician in Madison, Wisconsin. Individual provider, active in the CMS NPPES registry since March 20, 2017.
## Identity
- **NPI:** 1528509759 (Entity type: Individual)
- **Enumerated:** March 20, 2017
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 85567-20 (Wisconsin)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 2402 WINNEBAGO ST, Madison, WI 53704-5341
- **Phone:** (608) 828-7603 · **Fax:** (608) 242-6848
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** University Of Wisconsin Medical Foundation, Inc (NPI 1598784555, Middleton, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Vanderbilt University School Of Medicine, class of 2017
## Record status
- **NPPES last updated:** July 3, 2026
---
Source: [NPI Profile](https://npiprofile.com/npi/1528509759) · Data from the CMS NPPES public registry.