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

Dr. Mark Stephen Messinger, D.C.

Chiropractor in Haverhill, MA · enumerated 2007.

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

National Provider Identifier

1083732077

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Registry record

Entity type Individual (Type 1)

Name Dr. Mark Stephen Messinger

Credential D.C.

Sex Male

Practice address Haverhill, MA, 01832

Phone (978) 374-0700

Fax (978) 374-6052

Enumeration date Mar 27, 2007

Last updated in NPPES Jul 9, 2007

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

Taxonomy & licenses

111N00000X Chiropractor Chiropractic Providers · License 2011 (MA) Primary

DC · Doctor of Chiropractic: A licensed chiropractor focusing on musculoskeletal and nervous system disorders. About the DC credential

Other identifiers

Identifier	Type	State	Issuer
P710921	Other	MA	OXFORD
Y39508	Other	MA	BLUE CROSS GROUP #
0950554	Other	MA	AETNA PROVIDER NUMBER
Y36503	Other	MA	BLUE CROSS OF MA.
792200	Other	MA	TUFTS PROVIDER NUMBER
97974501	Other	MA	NETWORK HEALTH
4400325	Other	MA	UNITED HEALTH CARE
0017861	Other	MA	NEIGHBORHOOD HEALTH
1611321	Medicaid	MA	-
351302	Other	MA	HARVARD PILGRIM PROVIDER
2682204	Other	MA	CIGNA

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 Mark Messinger?

Mark Messinger is registered in NPPES with the primary taxonomy of Chiropractor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-09.