Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Gregory G. Harris, MD, MPH

Psychiatry Physician in Brookline, MA · enumerated 2006.

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

National Provider Identifier

1619923877

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Registry record

Entity type Individual (Type 1)

Name Dr. Gregory G. Harris

Credential MD, MPH

Sex Male

Practice address Brookline, MA, 02446

Phone (617) 983-0076

Fax (877) 991-8309

Enumeration date May 26, 2006

Last updated in NPPES Dec 31, 2020

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

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 79525 (MA) 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
J14771	Other	MA	PTAN
J14771	Other	MA	BLUECROSS BLUESHIELD MA
HAJ14771	Other	MA	MEDICARE
3132439	Medicaid	MA	-

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 NPI 1619923877 active?

Yes, as of the latest NPPES snapshot, NPI 1619923877 is active (record last updated 2020-12-31).

How do I verify Gregory Harris's NPI record?

Cross-check NPI 1619923877 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-12-31.