Dr William R Zimmer, MD - Medicare Internal Medicine in Springfield, IL

Dr William R Zimmer, MD is a medicare enrolled "Internal Medicine - Hematology & Oncology" physician in Springfield, Illinois. His current practice location is 301 N 8th St, Ste 1b201, Springfield, Illinois. You can reach out to his office (for appointments etc.) via phone at (217) 535-3799.

Dr William R Zimmer is licensed to practice in Illinois (license number ) 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 1275575821.

Contact Information

Dr William R Zimmer, MD
301 N 8th St, Ste 1b201,
Springfield, IL 62701-1041
(217) 535-3799
(217) 525-5685

Map and Direction




Physician's Profile

Full NameDr William R Zimmer
GenderMale
SpecialityInternal Medicine - Hematology & Oncology
Location301 N 8th St, Springfield, Illinois
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1275575821
  • Provider Enumeration Date: 06/11/2006
  • Last Update Date: 10/02/2007
  Medicare PECOS Information:
  • PECOS PAC ID: 9830283894
  • Enrollment ID: I20120816000972

Medical Identifiers

Medical identifiers for Dr William R Zimmer such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1275575821NPI-NPPES
0840046327OtherILBC/BS
107053OtherILHEALTHLINK
51985OtherILPERSONAL CARE
1720ZOtherILCATIPILLAR
008867OtherILHEALTH ALLIANCE

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RH0003XInternal Medicine - Hematology & Oncology (Illinois)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. Dr William R Zimmer allows following entities to bill medicare on his behalf.
Entity NameAlaska Native Tribal Health Consortium
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1437189339
PECOS PAC ID: 6709780265
Enrollment ID: O20031125000772

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. Dr William R Zimmer 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
Dr William R Zimmer, MD
Po Box 1977,
Springfield, IL 62705-1977

Ph: (217) 544-6464
Dr William R Zimmer, MD
301 N 8th St, Ste 1b201,
Springfield, IL 62701-1041

Ph: (217) 535-3799

Reviews and Comments


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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).

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