WILLIAM HENRY BAER II M.D.
NPI 1184731333
Internal Medicine in Grand Rapids, MI
About William Henry Baer Ii M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM HENRY BAER II M.D. (NPI 1184731333) is an individual internal medicine provider in Grand Rapids, Michigan, licensed in Michigan (4301065896) and active in the NPI registry since August 2006. He has opted out of Medicare through November 16, 2027 and remains eligible to order and refer, is affiliated with Spectrum Health, and is a graduate of West Virginia University School Of Medicine (1995).
NPPES Registry Identity
Specialties & Licenses
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Other Identifiers 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Opted out of Medicare
William Henry Baer Ii M.d. has filed a Medicare opt-out affidavit. Services are provided under private contract between the provider and the patient, and are not billed to or reimbursed by Medicare. The opt-out is on file from November 16, 2025 through November 16, 2027.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Spectrum Health
Acute Care Hospitals · Grand Rapids, MIMercy Health Saint Mary's
Acute Care Hospitals · Grand Rapids, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 49503 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 9
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
GRAND RAPIDS, MI 49503
GRAND RAPIDS, MI 49503
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is William Baer's NPI number?
The NPI number for William Baer is 1184731333. It was assigned to this individual provider in the NPPES registry on August 24, 2006.
Where is William Baer located?
William Baer practices at 260 Jefferson Ave SE Suite 115, Grand Rapids, MI 49503. The listed phone number is (616) 685-3100.
What is William Baer's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is William Baer enrolled in Medicare?
No. William Baer has opted out of Medicare through November 16, 2027. Care is provided under private contracts, and Medicare does not pay for services furnished by providers who have opted out. The provider remains eligible to order and refer services for Medicare patients.
What insurance does William Baer accept?
Health plans from Priority Health list William Baer as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is William Baer affiliated with any hospitals?
According to CMS data, William Baer is affiliated with Spectrum Health and Mercy Health Saint Mary's.
When was this NPI record last updated?
The NPPES record for William Baer was last updated on December 2, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.
