Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gregory J Massimi, MD

Anatomic Pathology & Clinical Pathology Physician in Norfolk, VA · enumerated 2006.

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

National Provider Identifier

1396786398

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Registry record

Entity type Individual (Type 1)

Name Gregory J Massimi

Credential MD

Sex Male

Practice address 6330 N Center Drive, Building 13 Suite 220, Norfolk, VA, 23502

Phone (757) 466-0089

Fax (757) 466-8017

Enumeration date Jun 9, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

207ZP0102X Anatomic Pathology & Clinical Pathology Physician Allopathic & Osteopathic Physicians · License 0101056922 (VA) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
6606083	Medicaid	VA	-

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 specialty is Gregory Massimi?

Gregory Massimi is registered in NPPES with the primary taxonomy of Anatomic Pathology & Clinical Pathology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

Other providers at this practice address

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Robert Hershberg Anatomic Pathology & Clinical Pathology Physician · Norfolk, VA NPI 1255378576 Olivia Lewis Mental Health Counselor · Norfolk, VA NPI 1396511317

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.