William Carpenter
NPI 1457807208 · Family Nurse Practitioner · Berkeley, CA
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Carpenter is a Family Nurse Practitioner provider in Berkeley, CA (NPI 1457807208).
Provider details
- NPI number
- 1457807208
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Sex
- Male
- Sole proprietor
- Yes
- License
- 728571 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
9 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
143 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 68 | $152 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 57 | $105 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 18 | $62 |
Typical Medicare-allowed amounts for these services range $62–$152 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 12 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 62 | 61 |
| Prednisone | 42 | 40 |
| Cephalexin | 39 | 39 |
| Ondansetron Hcl | 30 | 30 |
| Doxycycline Monohydrate | 23 | 22 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 18 | 17 |
| Cefpodoxime Proxetil | 17 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$139 across 8 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-08-31
- Last updated
- 2019-12-24
- Certified
- 2019-12-24
Frequently asked questions
- What is William Carpenter's NPI number?
- William Carpenter's National Provider Identifier (NPI) is 1457807208, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Carpenter's specialty?
- William Carpenter is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Carpenter located?
- William Carpenter's practice location on file with NPPES is 875 Arlington Ave, Berkeley, CA 94707.
- What is William Carpenter's phone number?
- The practice phone number listed in the NPPES registry for William Carpenter is (510) 847-6670.
- Does William Carpenter accept Medicare?
- William Carpenter is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Carpenter's NPI active?
- Yes — William Carpenter's NPI (1457807208) is active in the NPPES registry as of the last update on 2019-12-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.