DR. WILLIAM A. MICHALAK (M.D.) – Anatomic Pathology & Clinical Pathology Physician, NPI 1063475648

Anatomic Pathology & Clinical Pathology Physician

DR. WILLIAM A. MICHALAK (M.D.) is a healthcare provider. based in Butler, Pennsylvania. specializing in Anatomic Pathology & Clinical Pathology Physician. They hold the professional credentials M.D.. They hold a License No. MD043481E (PA). The NPI Number for DR. WILLIAM A. MICHALAK (M.D.) is 1063475648

Main info

Male

42 Years Of Experience

Accepts Medicare Assignment

Name

DR. WILLIAM A. MICHALAK (M.D.)

NPI

1063475648

Phone

(724) 284-4084

Address

PO BOX 1549

Enumeration Date

6 April 2006

Last Update Date

25 July 2007

Doctor Profile

Medical School Name

STATE UNIVERSITY OF NEW YORK DOWNSTATE MEDICAL CENTER

Secondary Phone

Graduation Year

1984 (42 years ago)

PAC ID

5193773547

Group Practice PAC ID

7416840160

Professional Enrollment ID

I20050112000304

Data current as of

19 May 2026

Profile Insights

NPPES metrics only — not quality of care.

Methodology

Experience54

Completeness75

Years active:20State licenses:1Digital endpointsOther names

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Provider Addresses for DR. WILLIAM A. MICHALAK (M.D.)

Butler Post Office, East Pushmataha Street, Green Acres, Butler, Choctaw County, Alabama, 36904, United States
SUITE 004
BUTLER, PA 160031549
Phone: (724) 284-4084
Fax: (724) 284-4144
Type: Mailing
911, East Brady Street, Butler, Butler County, Pennsylvania, 16001, United States
BUTLER, PA 160014646
Phone: (724) 284-4510
Fax: (724) 284-4144
Type: Location

NPPES updates history

No NPPES updates recorded for this provider.

Prescription Activity

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Open Payments (CMS)

No Open Payments data available for this provider.

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Medicare Enrollment & Revalidation

Source: CMS public data · Not endorsed by CMS ·

Educational use only—not medical, billing, or legal advice.

No Medicare enrollment or revalidation data available for this provider in our database.

Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS

Medicare Utilization (FFS)

Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·

Educational use only—not medical, billing, or legal advice.

No Medicare fee-for-service utilization data available for this provider in our database.

Insurance plans in this area (ZIP 16003)

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Group practice members

Group practice members are other physicians who share the same Group Practice PAC ID with this doctor. When doctors form a group practice and register in PECOS as a single entity, they receive a shared identification number. This table lists all providers in the same group practice.

PAC ID: 7416840160View full group profile

Name	Specialty	State
MENG-G MARTIN LEE (MD)	General Surgery	PA
MICHAEL ALEXIS MEWES (CRNP)	-	PA
DR. ANDREW JOSEPH SZABO (D.O.)	General Surgery	PA
MICHAEL A GATES (PA-C)	Physician Assistant	PA
MATTHEW PAUL COY (CRNA)	Certified Registered Nurse Anesthetist (Crna)	PA
EMILY MARION GIBSON (PA-C)	-	PA
MR. JOSEPH DANIEL KOLLAR (CRNP)	-	PA
DR. THOMAS B. PINTO (M.D.)	-	PA
DR. ALEXANDER BARSOUK (MD)	H E M A T O L O G Y/ O N C O L O G Y	PA
KIMBERLY SUNDIE (PA-C)	Physician Assistant	PA

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Frequently asked questions

How do payers reference DR. WILLIAM A. MICHALAK (M.D.)?

For DR. WILLIAM A. MICHALAK (M.D.), use NPI 1063475648 as the unique 10-digit identifier.

Is DR. WILLIAM A. MICHALAK (M.D.) shown as active in public data?

Registry records indicate DR. WILLIAM A. MICHALAK (M.D.) maintains an active NPI.

What area of care is associated with DR. WILLIAM A. MICHALAK (M.D.)?

DR. WILLIAM A. MICHALAK (M.D.)'s record emphasizes Anatomic Pathology & Clinical Pathology Physician. Clinical services aligned with this taxonomy classification.

What practice footprint exists for DR. WILLIAM A. MICHALAK (M.D.)?

Travel planning: use Butler, Pennsylvania as the reference point for DR. WILLIAM A. MICHALAK (M.D.), then confirm.

When was this NPI issued?

Enumeration for DR. WILLIAM A. MICHALAK (M.D.) is noted as April 6, 2006 where the registry provides it.