Gregory Hadfield, PA-C
NPI 1285869966 · Physician Assistant · Lakeport, CA
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Hadfield, PA-C is a Physician Assistant provider in Lakeport, CA (NPI 1285869966).
Provider details
- NPI number
- 1285869966
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Male
- Sole proprietor
- No
- License
- P-16311 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 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
12,275 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) |
|---|---|---|
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 5,494 | $6 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 1,649 | $112 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 1,173 | $36 |
| Destruction of Skin Growth, 1-14 Growths17110 | 1,074 | $85 |
| Destruction of Precancer Skin Growth, 15 Or More Growths17004 | 398 | $150 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 32 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ketoconazole | 394 | 173 |
| Mupirocin | 327 | 217 |
| Triamcinolone Acetonide | 289 | 157 |
| Clobetasol Propionate | 106 | 60 |
| Cephalexin | 101 | 82 |
| Hydrocortisone | 89 | 50 |
| Nystatin | 69 | 27 |
| Doxycycline Hyclate | 52 | 32 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$397 across 16 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
- 2009-05-24
- Last updated
- 2009-05-24
Frequently asked questions
- What is Gregory Hadfield's NPI number?
- Gregory Hadfield's National Provider Identifier (NPI) is 1285869966, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Hadfield's specialty?
- Gregory Hadfield is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gregory Hadfield located?
- Gregory Hadfield's practice location on file with NPPES is 5144 Hill Rd E, Lakeport, CA 95453-6300.
- What is Gregory Hadfield's phone number?
- The practice phone number listed in the NPPES registry for Gregory Hadfield is (707) 263-8955.
- Does Gregory Hadfield accept Medicare?
- Gregory Hadfield is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Hadfield's NPI active?
- Yes — Gregory Hadfield's NPI (1285869966) is active in the NPPES registry as of the last update on 2009-05-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.