Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

W Michael Crosby M D P C

Q: What is the NPI number for W Michael Crosby M D P C?

The NPI for W Michael Crosby M D P C is 1619006582, a Type 2 (organization) record in the CMS NPPES registry.

Certified Registered Nurse Anesthetist in Riverton, WY · enumerated 2007 · authorized official William Crosby, Owner.

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

National Provider Identifier

1619006582

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Registry record

Entity type Organization (Type 2)

Legal business name W Michael Crosby M D P C

Practice address 2100 W Sunset Dr, Riverton, WY, 82501

Phone (307) 856-4161

Enumeration date Mar 5, 2007

Last updated in NPPES Sep 11, 2025

Taxonomy & classification

207L00000X Anesthesiology Physician Allopathic & Osteopathic Physicians Secondary

367500000X Certified Registered Nurse Anesthetist Physician Assistants & Advanced Practice Nursing Providers Primary

Authorized official

Name William Crosby

Title Owner

Phone (307) 840-0874

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 W Michael Crosby M D P C?

The NPI for W Michael Crosby M D P C is 1619006582, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for W Michael Crosby M D P C?

NPPES lists William Crosby (Owner) as the authorized official for this organization.

Providers at this address

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Brooks Allison, MD PC Specialist · Riverton, WY NPI 1053374876 Archie Allison Specialist · Riverton, WY NPI 1144284506 Thomas L. Walsh, MD PC Specialist · Riverton, WY NPI 1740245695 Matthew Mullinix Certified Registered Nurse Anesthetist · Riverton, WY NPI 1063457893 Kari Sack Certified Registered Nurse Anesthetist · Riverton, WY NPI 1588609325 Ryan Wilcox Certified Registered Nurse Anesthetist · Riverton, WY NPI 1881630994 David Harker Surgery Physician · Riverton, WY NPI 1710996020 Riverton Memorial Hospital LLC Medicare Defined Swing Bed Hospital Unit · Riverton, WY NPI 1003902669

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.