Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Walter Schiff, CRNA

Certified Registered Nurse Anesthetist in Stony Brook, NY · enumerated 2008 · practices at Stonybrook University Hospital.

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

National Provider Identifier

1891955175

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Registry record

Entity type Individual (Type 1)

Name Mr. Walter Schiff

Credential CRNA

Sex Male

Practice address Stony Brook University Hospital, Department of Anesthesiology Hsc L4 060, Stony Brook, NY, 11794

Phone (631) 444-2975

Fax (631) 444-2907

Enumeration date Jun 11, 2008

Last updated in NPPES Jun 11, 2008

Taxonomy & licenses

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers · License 363121 1 (NY) Primary

CRNA · Certified Registered Nurse Anesthetist: An advanced practice nurse specializing in anesthesia care. About the CRNA 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

Is NPI 1891955175 active?

Yes, as of the latest NPPES snapshot, NPI 1891955175 is active (record last updated 2008-06-11).

How do I verify Walter Schiff's NPI record?

Cross-check NPI 1891955175 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-06-11.