WILLIAM L CARPENTER
NPI 1457807208
Nurse Practitioner - Family in Berkeley, CA
About William L Carpenter NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM L CARPENTER (NPI 1457807208) is an individual family provider in Berkeley, California, licensed in California (95004994) and active in the NPI registry since August 2016. He is enrolled in Medicare PECOS and is a graduate of Other (2016).
NPPES Registry Identity
Specialties & Licenses 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
William L Carpenter 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 Reassignments
8Medicare enrollment records show William Carpenter reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Rafael, CA 94901
- Reassigned Medicare billing, California enrollment
- 14 clinicians in this Medicare group
Davis, CA 95616
- Reassigned Medicare billing, California enrollment
- 2,570 clinicians in this Medicare group
Stockton, CA 95204
- Reassigned Medicare billing, California enrollment
- 6 clinicians in this Medicare group
Lodi, CA 95240
- Reassigned Medicare billing, California enrollment
- 148 clinicians in this Medicare group
Oakdale, CA 95361
- Reassigned Medicare billing, California enrollment
- 15 clinicians in this Medicare group
Redding, CA 96001
- Reassigned Medicare billing, California enrollment
- 63 clinicians in this Medicare group
Susanville, CA 96130
- Reassigned Medicare billing, California enrollment
- 50 clinicians in this Medicare group
Delano, CA 93215
- Reassigned Medicare billing, California enrollment
- 301 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.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94707 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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 William Carpenter's NPI number?
The NPI number for William Carpenter is 1457807208. It was assigned to this individual provider in the NPPES registry on August 31, 2016.
Where is William Carpenter located?
William Carpenter practices at 875 Arlington Ave, Berkeley, CA 94707. The listed phone number is (510) 847-6670.
What is William Carpenter's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is William Carpenter enrolled in Medicare?
Yes. William Carpenter 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 organizations bill Medicare for William Carpenter's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Carpenter reassigns Medicare benefits to 8 organizations: Brett V. Curtis, MD, A Professional Corporation, Inc. (San Rafael, CA), Regents Of The Univ Of Ca (Davis, CA), Manshadi Heart Institute Inc (Stockton, CA), Clinic Services Of California Medical Group Inc (Lodi, CA), Sadeghi Healthcare Providers, A Professional Medical Corporation (Oakdale, CA) and 3 more organizations, listed in the Medicare section above. 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 William Carpenter's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Carpenter accept?
Health plans from Blue Cross and Blue Shield of Texas list William Carpenter 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.
When was this NPI record last updated?
The NPPES record for William Carpenter was last updated on December 24, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.
# William L Carpenter · NPI 1457807208
Family physician in Berkeley, California. Individual provider, active in the CMS NPPES registry since August 31, 2016.
## Identity
- **NPI:** 1457807208 (Entity type: Individual)
- **Enumerated:** August 31, 2016
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 95004994 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 875 ARLINGTON AVE, Berkeley, CA 94707
- **Phone:** (510) 847-6670
## 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:** 8 organizations under Medicare reassignment (form CMS-855R): Brett V. Curtis, MD, A Professional Corporation, Inc. (NPI 1346372661, San Rafael, CA); Regents Of The Univ Of Ca (NPI 1053304071, Davis, CA); Manshadi Heart Institute Inc (NPI 1225380603, Stockton, CA); Clinic Services Of California Medical Group Inc (NPI 1578958450, Lodi, CA); Sadeghi Healthcare Providers, A Professional Medical Corporation (NPI 1285582023, Oakdale, CA); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2016
## Record status
- **NPPES last updated:** December 24, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1457807208) · Data from the CMS NPPES public registry.