DR. WILLIAM E AYETEY M.D.
NPI 1780604025
Psychiatry & Neurology - Psychiatry in Janesville, WI

Active since July 20, 2006PECOS EnrolledAccepts Medicare Assignment
903 MINERAL POINT AVE, JANESVILLE, WI 53548(608) 756-5555 Get Directions Write a Review

NPPES record last updated: April 1, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

Record update history: Apr 1, 2026, Jan 2, 2026 (2 updates tracked since 2026).

About Dr. William E Ayetey M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM E AYETEY M.D. (NPI 1780604025) is an individual psychiatry provider in Janesville, Wisconsin, licensed in Wisconsin (33457) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS, is affiliated with Mercy Health System Corp, and maintains 5 additional practice locations.

NPPES Registry Identity

NPI1780604025
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. WILLIAM E AYETEYCredential: M.D.
Location Address903 MINERAL POINT AVEJanesville, WI 53548-2970
Mailing Address903 Mineral Point AveJanesville, WI 53548-2970 · (608) 756-5555
Sole ProprietorNo
Medical School CMSUniversity Of Minnesota Medical SchoolGraduated 1991
Enumeration DateJuly 20, 2006
Last NPPES UpdateApril 1, 20262 updates tracked since enumeration
NPPES CertifiedApril 1, 2026
NPI 1780604025 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
Licenses Licensed in WI · 33457 Licensed in IL · 036.153566
Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

903 MINERAL POINT AVE, Janesville, WI 53548

Secondary Practice Locations 5

Location 1875 S Route 31Crystal Lake, IL 60014-8190 · Phone (779) 220-5500 · Fax (779) 220-5184
Location 28201 E Riverside BlvdRockford, IL 61114-2300 · Phone (815) 971-7000 · Fax (815) 968-4795
Location 31000 Mineral Point AveJanesville, WI 53548-2940 · Phone (608) 756-6761 · Fax (608) 756-6572
Location 4901 Grant StHarvard, IL 60033-1821 · Phone (815) 943-5431 · Fax (815) 943-0659
Location 51045 W Stephenson StFreeport, IL 61032-4864 · Phone (815) 741-7652

Other Identifiers 2

Medicaid31870900WI
OtherAYETEWILWI · Mercycare Insurance

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. William E Ayetey M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5698817096
PECOS Enrollment IDI20100123000019, I20201217001725
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the 2024 & 2026 CMS Medicare utilization dataset. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Hospital discharge day management, 30 minutes or less 99238
Hospital discharge day management of 30 minutes or less includes finalizing your treatment, discussing your progress, and planning after-care at home. It ensures you're ready to leave the hospital and continue recovery safely.
33 services27 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
21 services16 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mercy Health System Corp

Acute Care Hospitals · Janesville, WI
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number520066
Location1000 Mineral Point AveJanesville, WI 53548 · Rock County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 53548 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$163.24 typical visit price
range $53.90 – $163.24
Typical copayment $40.81 (range $13.47 – $40.81)
Most-billed visit code 99205
Established Patient
$67.37 typical visit price
range $17.40 – $133.76
Typical copayment $16.84 (range $4.35 – $33.44)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Social Worker (Clinical)
903 MINERAL POINT AVE
JANESVILLE, WI 53548
Social Worker (Clinical)
903 MINERAL POINT AVE
JANESVILLE, WI 53548
Psychologist
903 MINERAL POINT AVE
JANESVILLE, WI 53548
Social Worker (Clinical)
903 MINERAL POINT AVE
JANESVILLE, WI 53548
Speech-Language Pathologist
903 MINERAL POINT AVE
JANESVILLE, WI 53548
Social Worker (Clinical)
903 MINERAL POINT AVE
JANESVILLE, WI 53548
Psychologist (Addiction (Substance Use Disorder))
903 MINERAL POINT AVE
JANESVILLE, WI 53548
Counselor (Professional)
903 MINERAL POINT AVE
JANESVILLE, WI 53548

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1780604025, enumerated as an "individual" on July 20, 2006.

The provider is located at 903 MINERAL POINT AVE JANESVILLE, WI 53548 and the phone number is (608) 756-5555.

Psychiatry & Neurology with taxonomy code 2084P0800X and a focus in Psychiatry.

The provider might be accepting Accepts: Anthem Blue Cross and Blue Shield, MercyCare. Please consult your insurance carrier or call the provider to verify.

William Ayetey is affiliated with: MERCY HEALTH SYSTEM CORP.