Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Ralph K. Messo Jr., D.O., P.C.

Q: What is the NPI number for Ralph K. Messo Jr., D.O., P.C.?

The NPI for Ralph K. Messo Jr., D.O., P.C. is 1184798621, a Type 2 (organization) record in the CMS NPPES registry.

Internal Medicine Physician in Staten Island, NY · enumerated 2006 · authorized official Ralph Messo, Physician.

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

National Provider Identifier

1184798621

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Registry record

Entity type Organization (Type 2)

Legal business name Ralph K. Messo Jr., D.O., P.C.

Practice address 4143 Richmond Ave, Staten Island, NY, 10312

Phone (718) 966-5556

Fax (718) 966-7483

Enumeration date Nov 17, 2006

Last updated in NPPES Jan 24, 2008

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 184376 (NY) Primary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License 184376 (NY) Secondary

Authorized official

Name Ralph Messo

Title Physician

Phone (718) 966-5556

Other identifiers

Identifier	Type	State	Issuer
01460282	Medicaid	NY	-
1P0525	Other	NY	HEALTHNET
0451877	Other	NY	AETNA
100106871801	Medicaid	NY	-
0401475	Other	NY	UNITED HEALTH CARE
184376	Other	NY	HIP
OP235	Other	NY	OXFORD HEALTH PLAN
2698319	Other	NY	GHI PPO

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

Who is the authorized official for Ralph K. Messo Jr., D.O., P.C.?

NPPES lists Ralph Messo (Physician) as the authorized official for this organization.

What is the NPI number for Ralph K. Messo Jr., D.O., P.C.?

The NPI for Ralph K. Messo Jr., D.O., P.C. is 1184798621, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-01-24.