NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mark Joseph Messineo, M.D.

Specialist in Norwood, MA · enumerated 2005.

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

National Provider Identifier

1194718320

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Registry record

Entity type Individual (Type 1)
Name Mark Joseph Messineo
Credential M.D.
Sex Male
Practice address 825 Washington Street, Suite 240, Norwood, MA, 02062
Fax (781) 769-0371
Enumeration date Aug 23, 2005
Last updated in NPPES Oct 23, 2012

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 150845 (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
171211 Other MA HARVARD PILGRIM
J16597 Other MA BLUE CROSS/BLUE SHIELD
150845 Other MA TUFTS
200029847 Other MA RR MEDICARE
3189503 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

What specialty is Mark Messineo?
Mark Messineo is registered in NPPES with the primary taxonomy of Specialist. 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 2012-10-23.