Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. William E Ayetey, M.D.

Psychiatry Physician in Janesville, WI · enumerated 2006.

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

National Provider Identifier

1780604025

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Registry record

Entity type Individual (Type 1)

Name Dr. William E Ayetey

Credential M.D.

Sex Male

Practice address 903 Mineral Point Ave, Janesville, WI, 53548

Phone (608) 756-5555

Enumeration date Jul 20, 2006

Last updated in NPPES Apr 1, 2026

Taxonomy & licenses

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 036.153566 (IL) Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians · License 33457 (WI) 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
31870900	Medicaid	WI	-
AYETEWIL	Other	WI	MERCYCARE INSURANCE

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 1780604025 active?

Yes, as of the latest NPPES snapshot, NPI 1780604025 is active (record last updated 2026-04-01).

How do I verify William Ayetey's NPI record?

Cross-check NPI 1780604025 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 2026-04-01.