Dr. Gregory A. Ryan, DDS

Dr. Gregory A. Ryan is a General Practice Dentistry provider (Dentist) practicing in Fishers, IN, registered in the NPPES registry with NPI 1174729677 since 2007. The credential DDS stands for Doctor of Dental Surgery.

✓ Active NPI ✓ Valid NPI checksum

NPI	1174729677
Entity type	Individual (Type 1)
Name	Dr. Gregory A. Ryan
Credential	DDS
Sex	Male
Practice address	8410 E 116TH ST, Fishers, IN, 46038
Phone	3175760611
Fax	3175760705
Enumeration date	2007-06-22
Last updated in NPPES	2007-07-09

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
1223G0001X	General Practice Dentistry	Primary	12009885	IL

DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

Copy-ready billing details

Provider: Gregory Ryan, DDS
NPI: 1174729677
Taxonomy: 1223G0001X (General Practice Dentistry)
Address: 8410 E 116TH ST, Fishers, IN, 46038

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1073719472	William Sauter	Individual	General Practice Dentistry	Fishers, IN
1588077382	Scott Bassett	Individual	General Practice Dentistry	Fishers, IN
1700371986	Grant Ryan	Individual	General Practice Dentistry	Fishers, IN

Verify this record

Cross-check NPI 1174729677 against the authoritative CMS record: view Dr. Gregory A. Ryan on the official NPPES registry .

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.

Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Gregory Ryan?

Gregory Ryan is registered in NPPES with the primary taxonomy of General Practice Dentistry. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2007-07-09.