John Oas, M.D.
NPI 1336146638 · Neurology Physician · Gahanna, OH
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Oas, M.D. is a Neurology Physician provider in Gahanna, OH (NPI 1336146638).
Provider details
- NPI number
- 1336146638
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 35.074548 (OH)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-30
- Last updated
- 2020-11-10
- Certified
- 2020-11-10
Frequently asked questions
- What is John Oas's NPI number?
- John Oas's National Provider Identifier (NPI) is 1336146638, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Oas's specialty?
- John Oas is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is John Oas located?
- John Oas's practice location on file with NPPES is 920 N Hamilton Rd Ste 500, Gahanna, OH 43230-1757.
- What is John Oas's phone number?
- The practice phone number listed in the NPPES registry for John Oas is (614) 293-4969.
- Does John Oas accept Medicare?
- John Oas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Oas's NPI active?
- Yes — John Oas's NPI (1336146638) is active in the NPPES registry as of the last update on 2020-11-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.