William R Zimmermann, MD - Medicare Anesthesiology in Rockford, IL

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William R Zimmermann, MD is a medicare enrolled "Anesthesiology" physician in Rockford, Illinois. He graduated from medical school in 1989 and has 37 years of diverse experience with area of expertise as Anesthesiology. He is a member of the group practice Anesthesia Associates, Ltd, Auburn Medical Pc, Gottlieb Community Health Services Corporation, Associated Anesthesiologists Sc, Encore Anesthesia Group Llc and his current practice location is 8201 E Riverside Blvd, Rockford, Illinois. You can reach out to his office (for appointments etc.) via phone at (815) 971-7000.

William R Zimmermann is licensed to practice in Illinois (license number 036089011) 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 1356351845.

Contact Information

William R Zimmermann, MD
8201 E Riverside Blvd,
Rockford, IL 61114-2300
(815) 971-7000
Not Available

Map and Direction




Physician's Profile

Full NameWilliam R Zimmermann
GenderMale
SpecialityAnesthesiology
Experience37 Years
Location8201 E Riverside Blvd, Rockford, Illinois
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 R Zimmermann graduated from medical school in 1989
  NPI Data:
  • NPI Number: 1356351845
  • Provider Enumeration Date: 08/08/2006
  • Last Update Date: 04/08/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 2769376607
  • Enrollment ID: I20040211000504

Medical Identifiers

Medical identifiers for William R Zimmermann such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1356351845NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207L00000XAnesthesiology 036089011 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Loyola Gottlieb Memorial HospitalMelrose park, ILHospital
Macneal HospitalBerwyn, ILHospital
Auburn Community HospitalAuburn, NYHospital
Saint Francis Medical CenterPeoria, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Anesthesia Associates, Ltd296130342534
Auburn Medical Pc478978089126
Gottlieb Community Health Services Corporation337544299942
Associated Anesthesiologists Sc6305744129150
Encore Anesthesia Group Llc347697968335

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 R Zimmermann allows following entities to bill medicare on his behalf.
Entity NameRockford Health Physicians
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1043242886
PECOS PAC ID: 2567374036
Enrollment ID: O20031103000584
Entity NameWindy City Anesthesia PC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1932248622
PECOS PAC ID: 9234033572
Enrollment ID: O20031120000022
Entity NameLoyola University Medical Center
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1336159961
PECOS PAC ID: 3779488903
Enrollment ID: O20031202000027
Entity NameAssociated Anesthesiologists SC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1558306480
PECOS PAC ID: 6305744129
Enrollment ID: O20031230000544
Entity NameAnesthesia Associates, Ltd
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1952308223
PECOS PAC ID: 2961303425
Enrollment ID: O20040224000185
Entity NameCentral Dupage Physician Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1033149844
PECOS PAC ID: 5890696231
Enrollment ID: O20040303000601
Entity NameValley Pain Care Centers, Ltd
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1194722058
PECOS PAC ID: 7517858632
Enrollment ID: O20040320000066
Entity NameGottlieb Community Health Services Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1013415603
PECOS PAC ID: 3375442999
Enrollment ID: O20180420000980
Entity NameEncore Anesthesia Group LLC
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1558987883
PECOS PAC ID: 3476979683
Enrollment ID: O20200819000850

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 R Zimmermann 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 R Zimmermann, MD
29624 Network Pl,
Chicago, IL 60673-1296

Ph: (608) 756-6278		William R Zimmermann, MD
8201 E Riverside Blvd,
Rockford, IL 61114-2300

Ph: (815) 971-7000

Reviews and Comments


Anesthesiology Doctors in Rockford, IL

Dr. Liza A Dafchahi Shirani, MD
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 5875 E Riverside Blvd, Rockford, IL 61114
Phone: 815-398-9491    Fax: 815-381-7498
Dr. William B Weems, MD
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 5875 E Riverside Blvd, Rockford, IL 61114
Phone: 815-398-9491    Fax: 815-381-7498
Alan G Mowbray, MD
Anesthesiology
Medicare: Not Enrolled in Medicare
Practice Location: 2400 N Rockton Ave, Rockford, IL 61103
Phone: 815-971-4000    
John N. Edwards, MD
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 6785 Weaver Rd, Suite D, Rockford, IL 61114
Phone: 815-633-8545    
Dr. Vishrut P. Naik, MD
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 5875 E Riverside Blvd, Rockford, IL 61114
Phone: 815-398-9491    
Adam Soliman, DO
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 5875 E Riverside Blvd, Rockford, IL 61114
Phone: 815-398-9491    Fax: 815-381-7498
Dr. William Stephen Minore, M.D.
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 1235 N Mulford Rd Ste 222, Rockford, IL 61107
Phone: 815-397-8400    Fax: 815-229-0050

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.