Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John J Mara, MD

Q: What is the NPI number for John Mara?

The National Provider Identifier (NPI) for John Mara is 1659335297, a Type 1 (individual) record in the CMS NPPES registry.

Orthopaedic Hand Surgery Physician in Rocky Hill, CT · enumerated 2006 · practices at Orthopedic Surgical Partners, P.C..

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

National Provider Identifier

1659335297

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Registry record

Entity type Individual (Type 1)

Name John J Mara

Credential MD

Sex Male

Practice address 1111 Cromwell Ave Ste 404, Rocky Hill, CT, 06067

Phone (860) 525-4469

Fax (860) 278-8803

Enumeration date Apr 12, 2006

Last updated in NPPES Jun 28, 2023

Taxonomy & licenses

207XS0106X Orthopaedic Hand Surgery Physician Allopathic & Osteopathic Physicians · License 022280 (CT) 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
01222801	Medicaid	CT	-

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

Where does John Mara practice?

The practice location on file with NPPES is in Rocky Hill, CT. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for John Mara?

The National Provider Identifier (NPI) for John Mara is 1659335297, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-06-28.