Gregory Dinwiddie, PAC
NPI 1578567848 · Physician Assistant · Oklahoma City, OK
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Dinwiddie, PAC is a Physician Assistant provider in Oklahoma City, OK (NPI 1578567848).
Provider details
- NPI number
- 1578567848
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PAC
- Sex
- Male
- Sole proprietor
- No
- License
- 1037 (OK)
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
21 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
200 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) |
|---|---|---|
| Insertion of Non-Tunneled Central Venous Tube for Infusion (5 Years Or Older)36556 | 89 | $67 |
| Harvest of Vein Using an Endoscope33508 | 26 | $2 |
| Coronary Artery Bypass Using Artery Graft, 1 Graft33533 | 24 | $227 |
| Partial Destruction and Reconstruction of Right Upper Heart Chamber33257 | 19 | $73 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 16 | $138 |
| Coronary Artery Bypass Using Vein Or Artery Graft, 2 Grafts33518 | 14 | $51 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 3 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Amiodarone Hcl | 19 | 14 |
| Tramadol Hcl | 17 | 17 |
| Metoprolol Tartrate | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,451 across 36 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
- 2005-06-02
- Last updated
- 2022-07-21
Frequently asked questions
- What is Gregory Dinwiddie's NPI number?
- Gregory Dinwiddie's National Provider Identifier (NPI) is 1578567848, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Dinwiddie's specialty?
- Gregory Dinwiddie is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gregory Dinwiddie located?
- Gregory Dinwiddie's practice location on file with NPPES is 3300 Nw Expressway, Oklahoma City, OK 73112-4418.
- What is Gregory Dinwiddie's phone number?
- The practice phone number listed in the NPPES registry for Gregory Dinwiddie is (405) 949-3349.
- Does Gregory Dinwiddie accept Medicare?
- Gregory Dinwiddie is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Dinwiddie's NPI active?
- Yes — Gregory Dinwiddie's NPI (1578567848) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.