Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Ryan Marc Lieberman, MD

Psychiatry Physician in Norwalk, CT · enumerated 2007.

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

National Provider Identifier

1548483654

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Registry record

Entity type Individual (Type 1)

Name Dr. Ryan Marc Lieberman

Credential MD

Sex Male

Practice address 34 Maple St, Norwalk, CT, 06850

Phone (203) 852-2388

Enumeration date Apr 10, 2007

Last updated in NPPES Mar 7, 2023

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 043846 (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
043846	Other	CT	CT LICENSE

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 Ryan Lieberman?

The National Provider Identifier (NPI) for Ryan Lieberman is 1548483654, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ryan Lieberman practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-03-07.