Nathaniel O'Leary, MD
NPI 1336726108 · Family Medicine Physician · Washington, PA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathaniel O'Leary, MD is a Family Medicine Physician provider in Washington, PA (NPI 1336726108).
Provider details
- NPI number
- 1336726108
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
5 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
100 Medicare services, 2024 (ranked within specialty)
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 methodology.
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 | 22 | $122 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 19 | $167 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 18 | $85 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 15 | $123 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 13 | $9 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 13 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 103 | 32 |
| Metformin Hcl | 70 | 15 |
| Lisinopril | 66 | 23 |
| Omeprazole | 50 | 12 |
| Levothyroxine Sodium | 38 | 13 |
| Losartan Potassium | 37 | 12 |
| Trazodone Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-03-26
- Last updated
- 2024-04-22
- Certified
- 2024-04-22
Frequently asked questions
- What is Nathaniel O'Leary's NPI number?
- Nathaniel O'Leary's National Provider Identifier (NPI) is 1336726108, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathaniel O'Leary's specialty?
- Nathaniel O'Leary is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nathaniel O'Leary located?
- Nathaniel O'Leary's practice location on file with NPPES is 95 Leonard Ave Ste 200, Washington, PA 15301-3368.
- What is Nathaniel O'Leary's phone number?
- The practice phone number listed in the NPPES registry for Nathaniel O'Leary is (724) 223-3100.
- Does Nathaniel O'Leary accept Medicare?
- Nathaniel 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 Nathaniel O'Leary's NPI active?
- Yes — Nathaniel O'Leary's NPI (1336726108) is active in the NPPES registry as of the last update on 2024-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.