William Henry Baer Ii, MD - Medicare Internal Medicine in Grand Rapids, MI

William Henry Baer Ii, MD is a medicare enrolled "Internal Medicine" physician in Grand Rapids, Michigan. He went to West Virginia University School Of Medicine and graduated in 1995 and has 29 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Physiotherapy Associates Inc, Advantage Health/saint Mary's Medical Group, Ivyrehab Sept, Llc and his current practice location is 260 Jefferson Ave Se, Suite 115, Grand Rapids, Michigan. You can reach out to his office (for appointments etc.) via phone at (616) 685-3100.

William Henry Baer Ii is licensed to practice in Michigan (license number 4301065896) and he also participates in the medicare program. He accepts medicare assignments (which means he accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and his NPI Number is 1184731333.

Contact Information

William Henry Baer Ii, MD
260 Jefferson Ave Se, Suite 115,
Grand Rapids, MI 49503-4597
(616) 685-3100
(616) 685-3111

Map and Direction




Physician's Profile

Full NameWilliam Henry Baer Ii
GenderMale
SpecialityInternal Medicine
Experience29 Years
Location260 Jefferson Ave Se, Grand Rapids, Michigan
Accepts Medicare AssignmentsYes. He accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • William Henry Baer Ii attended and graduated from West Virginia University School Of Medicine in 1995
  NPI Data:
  • NPI Number: 1184731333
  • Provider Enumeration Date: 08/24/2006
  • Last Update Date: 12/02/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 0143236992
  • Enrollment ID: I20100916000449

Medical Identifiers

Medical identifiers for William Henry Baer Ii such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1184731333NPI-NPPES
1104107932OtherMIBCBS OF MICHIGAN
3471741MedicaidMI
38-2145264OtherIRS TAX ID # THRU CORP

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 4301065896 (Michigan)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Mercy Health Saint Mary'sGrand rapids, MIHospital
Spectrum HealthGrand rapids, MIHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Physiotherapy Associates Inc3577470442429
Advantage Health/saint Mary's Medical Group4082807961398
Ivyrehab Sept, Llc79119909081137

Medicare Reassignments

Some practitioners may not bill the customers directly but medicare billing happens through clinics / group practice / hospitals where the provider works. Medicare reassignment of benefits is a mechanism by which practitioners allow third parties to bill and receive payment for medicare services performed by them. William Henry Baer Ii allows following entities to bill medicare on his behalf.
Entity NameAdvantage Health/saint Mary's Medical Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1376862151
PECOS PAC ID: 4082807961
Enrollment ID: O20101023000279

Medicare Part D Prescriber Enrollment

Any physician or other eligible professional who prescribes Part D drugs must either enroll in the Medicare program or opt out in order to prescribe drugs to their patients with Part D prescription drug benefit plans. William Henry Baer Ii is enrolled with medicare and thus, if eligible, can prescribe medicare part D drugs to patients with medicare part D benefits.

Mailing Address and Practice Location

Mailing AddressPractice Location Address
William Henry Baer Ii, MD
1900 44th St Se,
Grand Rapids, MI 49508-5008

Ph: (616) 685-1808
William Henry Baer Ii, MD
260 Jefferson Ave Se, Suite 115,
Grand Rapids, MI 49503-4597

Ph: (616) 685-3100

Reviews and Comments


Internal Medicine Doctors in Grand Rapids, MI

Maureen U Tan- Pedres, M.D.
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Medicare: Accepting Medicare Assignments
Practice Location: 100 Michigan St Ne, Suite A721, Grand Rapids, MI 49503
Phone: 616-391-3139    Fax: 616-391-3044
Jeffery Allen Woo, M.D.
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Medicare: Not Enrolled in Medicare
Practice Location: 1900 Wealthy St Se, Ste 150, Grand Rapids, MI 49506
Phone: 616-459-3158    Fax: 616-988-0071
Robert W Selfe, D.O.
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Medicare: Accepting Medicare Assignments
Practice Location: 221 Michigan St Ne, Suite 200, Grand Rapids, MI 49503
Phone: 616-267-8950    Fax: 616-267-8585
Dr. Erin Megan Pettijohn, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 250 Cherry St Se Ste 2200, Grand Rapids, MI 49503
Phone: 616-685-5600    
Dr. Andrew Leo Sochacki, M.D.
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Medicare: Accepting Medicare Assignments
Practice Location: 5800 Foremost Dr Se Ste 200, Grand Rapids, MI 49546
Phone: 616-389-1800    
Stephanie F Williams, MD
Internal Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 145 Michigan St Ne, Suite 5200, Grand Rapids, MI 49503
Phone: 616-486-5933    Fax: 616-486-6489
Simin Beg, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 145 Michigan St Ne Ste 3410, Grand Rapids, MI 49503
Phone: 616-391-9945    

Medicare Program: Medicare is a federal government program which provides health insurance to people who are 65 or older. This program also covers certain younger people with disabilities (who receive Social Security Disability Insurance - SSDI), and people with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant, sometimes called ESRD.

Medicare Assignment: Assignment means that your doctor, provider, or supplier agrees (or is required by law) to accept the Medicare-approved amount as full payment for covered services. Most doctors, providers, and suppliers accept assignment, but you should always check to make sure. Participating providers have signed an agreement to accept assignment for all Medicare-covered services.

NPI Number: The National Provider Identifier (NPI) is a unique identification number for covered health care providers. The NPI must be used in lieu of legacy provider identifiers in the HIPAA standards transactions. Covered health care providers and all health plans and health care clearinghouses must use the NPIs in the administrative and financial transactions adopted under HIPAA (Health Insurance Portability and Accountability Act).

Our Data: Information on www.medicarelist.com is built using data sources published by Centers for Medicare & Medicaid Services (CMS) under Freedom of Information Act (FOIA). The information disclosed on the NPI Registry are FOIA-disclosable and are required to be disclosed under the FOIA and the eFOIA amendments to the FOIA. There is no way to 'opt out' or 'suppress' the NPPES record data for health care providers with active NPIs.