Marcus Johannes Geer, MD - Medicare Internal Medicine in Ann Arbor, MI

Marcus Johannes Geer, MD is a medicare enrolled "Internal Medicine - Hematology" physician in Ann Arbor, Michigan. His current practice location is 1500 E Medical Center Dr, Ann Arbor, Michigan. You can reach out to his office (for appointments etc.) via phone at (734) 936-4000.

Marcus Johannes Geer is licensed to practice in Michigan (license number 4301117307) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1164872537.

Contact Information

Marcus Johannes Geer, MD
1500 E Medical Center Dr,
Ann Arbor, MI 48109-5000
(734) 936-4000
Not Available



Physician's Profile

Full NameMarcus Johannes Geer
GenderMale
SpecialityInternal Medicine - Hematology
Location1500 E Medical Center Dr, Ann Arbor, Michigan
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1164872537
  • Provider Enumeration Date: 06/16/2016
  • Last Update Date: 08/01/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 0345535845
  • Enrollment ID: I20230803003147

Medical Identifiers

Medical identifiers for Marcus Johannes Geer such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1164872537NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RH0003XInternal Medicine - Hematology & Oncology 4301117307 (Michigan)Secondary
207RH0000XInternal Medicine - Hematology 4301117307 (Michigan)Primary

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. Marcus Johannes Geer allows following entities to bill medicare on his behalf.
Entity NameRegents Of The University Of Michigan
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1205868353
PECOS PAC ID: 3779496856
Enrollment ID: O20031106000325

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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. Marcus Johannes Geer 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
Marcus Johannes Geer, MD
3621 S State St,
Ann Arbor, MI 48108-1633

Ph: (734) 647-5299
Marcus Johannes Geer, MD
1500 E Medical Center Dr,
Ann Arbor, MI 48109-5000

Ph: (734) 936-4000

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Internal Medicine Doctors in Ann Arbor, MI

Nabil Alkhoury Fallouh, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1500 East Medical Center Dr, 3rd Floor Taubman Ctr Recp B, Ann Arbor, MI 48109
Phone: 734-936-5582    
Sameer Dev Saini, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 1500 E Medical Center Dr, Ann Arbor, MI 48109
Phone: 734-936-4000    
Dr. David Alexander Stewart, M.D.
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 1500 E Medical Center Dr, 12th Floor C.s. Mott Children's Hospital Room 525, Ann Arbor, MI 48109
Phone: 734-763-5302    Fax: 734-647-5624
Dr. Aiman M Mahmood, M.D.
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1500 E Medical Center Dr, Med Inn C728, Ann Arbor, MI 48109
Phone: 734-998-0891    
Anastasia Irene Wasylyshyn, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1500 E Medical Center Dr, Ann Arbor, MI 48109
Phone: 734-936-4000    
Katherine Saber Salisbury, MD
Internal Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 4260 Plymouth Rd, Ann Arbor, MI 48109
Phone: 734-764-6831    
Anne Lewis Carlton,
Internal Medicine
Medicare: Medicare Enrolled
Practice Location: 1500 E Medical Center Dr, Ann Arbor, MI 48109
Phone: 734-647-5900    

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