Gregory O'Leary, MD
NPI 1306866579 · Family Medicine Physician · Gastonia, NC
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory O'Leary, MD is a Family Medicine Physician provider in Gastonia, NC (NPI 1306866579).
Provider details
- NPI number
- 1306866579
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 2001-01107 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
2,986 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 607 | $120 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 299 | $10 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 284 | $16 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 278 | $13 |
| Hemoglobin A1c Level83036 | 252 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 249 | $8 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 143 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Losartan Potassium | 516 | 149 |
| Amlodipine Besylate | 385 | 114 |
| Atorvastatin Calcium | 375 | 110 |
| Rosuvastatin Calcium | 310 | 95 |
| Levothyroxine Sodium | 310 | 95 |
| Pantoprazole Sodium | 303 | 83 |
| Lisinopril |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$347 across 20 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
- 2006-07-20
- Last updated
- 2026-05-06
- Certified
- 2026-05-06
Frequently asked questions
- What is Gregory O'Leary's NPI number?
- Gregory O'Leary's National Provider Identifier (NPI) is 1306866579, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory O'Leary's specialty?
- Gregory O'Leary is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory O'Leary located?
- Gregory O'Leary's practice location on file with NPPES is 924 Cox Rd, Gastonia, NC 28054-3456.
- What is Gregory O'Leary's phone number?
- The practice phone number listed in the NPPES registry for Gregory O'Leary is (704) 495-6334.
- Does Gregory O'Leary accept Medicare?
- Gregory O'Leary is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory O'Leary's NPI active?
- Yes — Gregory O'Leary's NPI (1306866579) is active in the NPPES registry as of the last update on 2026-05-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.