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

Dr. Peter Michael Wistreich

Internal Medicine Physician in Nyack, NY · enumerated 2012.

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

National Provider Identifier

1649544081

Verified

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Registry record

Entity type Individual (Type 1)

Name Dr. Peter Michael Wistreich

Sex Male

Practice address Nyack, NY, 10960

Phone (914) 217-6450

Fax (845) 358-3686

Enumeration date Mar 2, 2012

Last updated in NPPES Mar 2, 2012

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

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 150164 (NY) Secondary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 150164 (NY) Primary

Other identifiers

Identifier	Type	State	Issuer
150164	Other	NY	STATE LICENSURE

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 Wistreich practice?

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

What is the NPI number for Peter Wistreich?

The National Provider Identifier (NPI) for Peter Wistreich is 1649544081, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-03-02.