WALTER W. MILLS MD
NPI 1871677948
Family Medicine in Santa Cruz, CA
About Walter W. Mills Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WALTER W. MILLS MD (NPI 1871677948) is an individual family medicine provider in Santa Cruz, California, licensed in California (G45945) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Santa Rosa.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 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)
Walter W. Mills Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show Walter Mills reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Santa Cruz, CA 95062
- Reassigned Medicare billing, California enrollment
- 50 clinicians in this Medicare group
Santa Cruz, CA 95065
- Reassigned Medicare billing, California enrollment
- 1,191 clinicians in this Medicare group
Prunedale, CA 93907
- Reassigned Medicare billing, California enrollment
- Also billed through NPI 1588617955 (California)
- 284 clinicians in this Medicare group
Santa Clara, CA 95051
- 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 95062 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 7
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
SANTA CRUZ, CA 95062
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 Walter Mills's NPI number?
The NPI number for Walter Mills is 1871677948. It was assigned to this individual provider in the NPPES registry on October 25, 2006.
Where is Walter Mills located?
Walter Mills practices at 1510 Capitola Rd, Santa Cruz, CA 95062. The listed phone number is (831) 427-3500.
What is Walter Mills's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Walter Mills enrolled in Medicare?
Yes. Walter Mills is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Walter Mills's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Walter Mills reassigns Medicare benefits to 4 organizations: Santa Cruz Community Health Centers (Santa Cruz, CA), Dignity Health Medical Foundation (Santa Cruz, CA), County Of Monterey (Prunedale, CA) and Permanente Medical Group Inc (Santa Clara, CA). Each 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 Walter Mills'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 Walter Mills was last updated on October 26, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Walter W. Mills, MD · NPI 1871677948
Family Medicine physician in Santa Cruz, California. Individual provider, active in the CMS NPPES registry since October 25, 2006.
## Identity
- **NPI:** 1871677948 (Entity type: Individual)
- **Enumerated:** October 25, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** G45945 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1510 CAPITOLA RD, Santa Cruz, CA 95062-2912
- **Phone:** (831) 427-3500
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): Santa Cruz Community Health Centers (NPI 1952749541, Santa Cruz, CA); Dignity Health Medical Foundation (NPI 1598961245, Santa Cruz, CA); County Of Monterey (NPI 1063151363, Prunedale, CA); Permanente Medical Group Inc (NPI 1073606299, Santa Clara, CA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** October 26, 2023
- **Other identifiers:** Medicaid 00G459450 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1871677948) · Data from the CMS NPPES public registry.