Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Eric Paul Liben, MD

Q: What is the NPI number for Eric Liben?

The National Provider Identifier (NPI) for Eric Liben is 1336183888, a Type 1 (individual) record in the CMS NPPES registry.

Internal Medicine Physician in North Haven, CT · enumerated 2006.

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

National Provider Identifier

1336183888

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Registry record

Entity type Individual (Type 1)

Name Eric Paul Liben

Credential MD

Sex Male

Practice address 100 Broadway, North Haven, CT, 06473

Phone (203) 234-1891

Fax (203) 234-7037

Enumeration date Jun 15, 2006

Last updated in NPPES Mar 3, 2014

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 025715 (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
010025715CT03	Other	CT	ANTHEM BLUECROSS/BLUESHIE
0460198	Other	CT	AETNA
257150	Other	CT	CONNECTICARE
001257153	Medicaid	CT	-
110180168	Other	CT	RAILROAD MEDICARE
01025715	Other	CT	CIGNA
061535742	Other	CT	UNITED HEALTH CARE
0Q1451	Other	CT	HEALTHNET
P522302	Other	CT	OXFORD

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

What is the NPI number for Eric Liben?

The National Provider Identifier (NPI) for Eric Liben is 1336183888, a Type 1 (individual) record in the CMS NPPES registry.

Where does Eric Liben practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-03-03.