Dr. Gregory R. Loomis, DDS

Dr. Gregory R. Loomis is a General Practice Dentistry provider (Dentist) practicing in San Carlos, CA, registered in the NPPES registry with NPI 1932246089 since 2007. The credential DDS stands for Doctor of Dental Surgery. Practices at Shifteh Iranmanesh Dmd Inc (listed at the same practice address in NPPES).

✓ Active NPI ✓ Valid NPI checksum Sole proprietor

NPI	1932246089
Entity type	Individual (Type 1)
Name	Dr. Gregory R. Loomis
Credential	DDS
Sex	Male
Practice address	San Carlos, CA, 94070
Phone	6505930444
Fax	6505930481
Enumeration date	2007-01-30
Last updated in NPPES	2007-07-08

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

Taxonomy code	Specialty	Primary	License	State
1223G0001X	General Practice Dentistry	Primary	29353	CA

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 Loomis, DDS
NPI: 1932246089
Taxonomy: 1223G0001X (General Practice Dentistry)
Address: San Carlos, CA, 94070

Other providers at this practice address

NPI	Name	Type	Specialty	Location
1487171534	Shifteh Iranmanesh	Individual	Dentist	San Carlos, CA
1649138660	Shifteh Iranmanesh Dmd Inc	Organization	General Practice Dentistry	San Carlos, CA

Verify this record

Cross-check NPI 1932246089 against the authoritative CMS record: view Dr. Gregory R. Loomis 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 Loomis?

Gregory Loomis 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 2007-07-08.