Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ernesto Gonzalez-Martinez, MD

Dermatology Physician in Boston, MA · enumerated 2005.

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

National Provider Identifier

1821070806

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Registry record

Entity type Individual (Type 1)

Name Dr. Ernesto Gonzalez-Martinez

Credential MD

Sex Male

Practice address 50 Staniford St, Suite 200, Boston, MA, 02114

Phone (617) 726-2914

Fax (617) 726-7768

Enumeration date Nov 16, 2005

Last updated in NPPES Aug 1, 2012

Taxonomy & licenses

207N00000X Dermatology Physician Allopathic & Osteopathic Physicians · License 40589 (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
040589	Other	MA	TUFTS HEALTH PLAN
M09515	Other	MA	BCBS MA
2053586	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.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Ernesto Gonzalez-Martinez?

Ernesto Gonzalez-Martinez is registered in NPPES with the primary taxonomy of Dermatology 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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-08-01.