Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Michael C Ruddy, M.D.

Specialist in Princeton Junction, NJ · enumerated 2006.

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

National Provider Identifier

1831138015

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Registry record

Entity type Individual (Type 1)

Name Michael C Ruddy

Credential M.D.

Sex Male

Practice address 88 Princeton Hightstown Rd, Suite 203, Princeton Junction, NJ, 08550

Phone (609) 750-7330

Fax (609) 750-7336

Enumeration date Jun 5, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

174400000X Specialist Other Service Providers · License MA31313 (NJ) 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
0305250000	Other	NJ	AMERIHEALTH
08515008	Other	NJ	CIGNA
1214608	Medicaid	NJ	-
1K7020	Other	NJ	HEALTH NET
3144306	Other	NJ	AETNA

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 Michael Ruddy practice?

The practice location on file with NPPES is in Princeton Junction, NJ. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Michael Ruddy?

The National Provider Identifier (NPI) for Michael Ruddy is 1831138015, 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 2007-07-08.