Gregory Kooyman, P.A.
NPI 1346334406 · Physician Assistant · Dayton, OH
Gregory Kooyman, P.A. is a Physician Assistant provider in Dayton, OH (NPI 1346334406).
Provider details
- NPI number
- 1346334406
- Entity type
- Individual
- Primary specialty
- Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- P.A.
- Sex
- Male
- Sole proprietor
- No
- License
- 50-000356 (OH)
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 tenure38% of score
19 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
- 2006-10-03
- Last updated
- 2013-05-21
Frequently asked questions
- What is Gregory Kooyman's NPI number?
- Gregory Kooyman's National Provider Identifier (NPI) is 1346334406, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Kooyman's specialty?
- Gregory Kooyman is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gregory Kooyman located?
- Gregory Kooyman's practice location on file with NPPES is 1 Wyoming St, Dayton, OH 45409-2722.
- What is Gregory Kooyman's phone number?
- The practice phone number listed in the NPPES registry for Gregory Kooyman is (513) 281-4400.
- Is Gregory Kooyman's NPI active?
- Yes — Gregory Kooyman's NPI (1346334406) is active in the NPPES registry as of the last update on 2013-05-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.