Gary Onady, MD, PHD
NPI 1396792347 · Internal Medicine Physician · Trenton, OH
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gary Onady, MD, PHD is a Internal Medicine Physician provider in Trenton, OH (NPI 1396792347).
Provider details
- NPI number
- 1396792347
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Male
- Sole proprietor
- No
- License
- 35.057057 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
410 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 108 | $76 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 92 | $104 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 75 | $76 |
| Hemoglobin A1c Level83036 | 56 | $10 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 48 | $55 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 102 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 365 | 119 |
| Lisinopril | 165 | 49 |
| Levothyroxine Sodium | 163 | 49 |
| Amlodipine Besylate | 160 | 56 |
| Gabapentin | 145 | 39 |
| Omeprazole | 141 | 46 |
| Albuterol Sulfate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-27
- Last updated
- 2025-09-15
- Certified
- 2025-09-15
Frequently asked questions
- What is Gary Onady's NPI number?
- Gary Onady's National Provider Identifier (NPI) is 1396792347, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gary Onady's specialty?
- Gary Onady is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Gary Onady located?
- Gary Onady's practice location on file with NPPES is 715 W State St, Trenton, OH 45067-9220.
- What is Gary Onady's phone number?
- The practice phone number listed in the NPPES registry for Gary Onady is (513) 988-6067.
- Does Gary Onady accept Medicare?
- Gary Onady is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gary Onady's NPI active?
- Yes — Gary Onady's NPI (1396792347) is active in the NPPES registry as of the last update on 2025-09-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.