Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jon Andrew Grammes, DO

Clinical Cardiac Electrophysiology Physician in Norfolk, VA · enumerated 2010.

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

National Provider Identifier

1972821593

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Registry record

Entity type Individual (Type 1)

Name Jon Andrew Grammes

Credential DO

Sex Male

Practice address 844 Kempsville Rd Ste 204, Norfolk, VA, 23502

Phone (757) 261-0700

Fax (757) 261-0701

Enumeration date May 6, 2010

Last updated in NPPES Dec 29, 2023

Taxonomy & licenses

207RC0000X Cardiovascular Disease Physician Allopathic & Osteopathic Physicians · License 0102202645 (VA) Secondary

207RC0001X Clinical Cardiac Electrophysiology Physician Allopathic & Osteopathic Physicians · License 0102202645 (VA) Primary

DO · Doctor of Osteopathic Medicine: A fully licensed physician trained in osteopathic medical schools, with the same practice rights as an MD. About the DO credential

Other identifiers

Identifier	Type	State	Issuer
VAA103564	Other	-	INDIVIDUAL PTAN

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.

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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 Jon Grammes?

Jon Grammes is registered in NPPES with the primary taxonomy of Clinical Cardiac Electrophysiology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-12-29.