Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Peter Orrin Rostenberg, MD

Internal Medicine Physician in New Fairfield, CT · enumerated 2006.

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

National Provider Identifier

1538272117

Verified

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Registry record

Entity type Individual (Type 1)

Name Peter Orrin Rostenberg

Credential MD

Sex Male

Practice address New Fairfield, CT, 06812

Phone (203) 746-3300

Enumeration date Aug 16, 2006

Last updated in NPPES Jul 8, 2007

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 17077 (CT) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

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 Peter Rostenberg practice?

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

What is the NPI number for Peter Rostenberg?

The National Provider Identifier (NPI) for Peter Rostenberg is 1538272117, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.