MARY C. FOX MD
NPI 1154409241
Emergency Medicine in Walnut Creek, CA
About Mary C. Fox Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY C. FOX MD (NPI 1154409241) is an individual emergency medicine provider in Walnut Creek, California, licensed in California (A71535) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Mary C. Fox Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mary Fox reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Richmond, CA 94801
- Reassigned Medicare billing, California enrollment
- 20,078 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94596 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.
WALNUT CREEK, CA 94596
WALNUT CREEK, CA 94596
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 Mary Fox's NPI number?
The NPI number for Mary Fox is 1154409241. It was assigned to this individual provider in the NPPES registry on November 2, 2006. The provider is also known as Mary C Meyer MD.
Where is Mary Fox located?
Mary Fox practices at 1425 S Main St, Walnut Creek, CA 94596. The listed phone number is (925) 295-4000.
What is Mary Fox's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Mary Fox enrolled in Medicare?
Yes. Mary Fox is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mary Fox's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Fox reassigns Medicare benefits to Permanente Medical Group Inc (Richmond, CA). 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 Mary Fox's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Mary Fox was last updated on January 10, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.
# Mary C. Fox, MD · NPI 1154409241
Emergency Medicine physician in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since November 2, 2006.
## Identity
- **NPI:** 1154409241 (Entity type: Individual)
- **Enumerated:** November 2, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** A71535 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1425 S MAIN ST, Walnut Creek, CA 94596-5318
- **Phone:** (925) 295-4000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Permanente Medical Group Inc (NPI 1235226531, Richmond, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 10, 2022
- **Other identifiers:** Medicaid 00A715350 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1154409241) · Data from the CMS NPPES public registry.