NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

David R Giammar, M.D.

Colon & Rectal Surgery Physician in Hilliard, OH · enumerated 2005.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1154307858

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name David R Giammar
Credential M.D.
Sex Male
Practice address 3853 Trueman Ct, Hilliard, OH, 43026
Phone (614) 210-2563
Fax (614) 210-2563
Enumeration date Dec 15, 2005
Last updated in NPPES Apr 16, 2026

Taxonomy & licenses

208C00000X Colon & Rectal Surgery Physician Allopathic & Osteopathic Physicians · License 35.077358 (OH) Primary
208C00000X Colon & Rectal Surgery Physician Allopathic & Osteopathic Physicians · License 4301102844 (MI) Secondary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 → Validate an NPI →

Frequently asked questions

What is the NPI number for David Giammar?
The National Provider Identifier (NPI) for David Giammar is 1154307858, a Type 1 (individual) record in the CMS NPPES registry.
Where does David Giammar practice?
The practice location on file with NPPES is in Hilliard, OH. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-16.