Dr William B Weems, MD - Medicare Anesthesiology in Rockford, IL

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Dr William B Weems, MD is a medicare enrolled "Anesthesiology" physician in Rockford, Illinois. He went to University Of Chicago, Pritzker School Of Medicine and graduated in 1996 and has 30 years of diverse experience with area of expertise as Anesthesiology. He is a member of the group practice Rockford Health Physicians, Oak Brook Anesthesiologists Ltd, Advocate Health And Hospitals Corporation and his current practice location is 5875 E Riverside Blvd, Rockford, Illinois. You can reach out to his office (for appointments etc.) via phone at (815) 398-9491.

Dr William B Weems is licensed to practice in Illinois (license number 036101350) 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 1003856295.

Contact Information

Dr William B Weems, MD
5875 E Riverside Blvd,
Rockford, IL 61114-4937
(815) 398-9491
(815) 381-7498

Map and Direction




Physician's Profile

Full NameDr William B Weems
GenderMale
SpecialityAnesthesiology
Experience30 Years
Location5875 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:
  • Dr William B Weems attended and graduated from University Of Chicago, Pritzker School Of Medicine in 1996
  NPI Data:
  • NPI Number: 1003856295
  • Provider Enumeration Date: 06/07/2006
  • Last Update Date: 04/14/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 4486552502
  • Enrollment ID: I20040806000861

Medical Identifiers

Medical identifiers for Dr William B Weems such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1003856295NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207L00000XAnesthesiology 036101350 (Illinois)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Advocate Sherman HospitalElgin, ILHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Rockford Health Physicians2567374036362
Oak Brook Anesthesiologists Ltd387055429816
Advocate Health And Hospitals Corporation78108009352682

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 B Weems allows following entities to bill medicare on his behalf.
Entity NameNorthwestern Medical Faculty Foundation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1346235314
PECOS PAC ID: 4587576814
Enrollment ID: O20031105000541
Entity NameAdvocate Health And Hospitals Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1700824455
PECOS PAC ID: 7810800935
Enrollment ID: O20031106000064
Entity NameTown Square Anesthesia Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1669471017
PECOS PAC ID: 9335047455
Enrollment ID: O20031229000379
Entity NameOrthomidwest, Pllc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1730136474
PECOS PAC ID: 0749183713
Enrollment ID: O20040128000533
Entity NameCentral Dupage Physician Group
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1033149844
PECOS PAC ID: 5890696231
Enrollment ID: O20040303000601
Entity NameOak Brook Anesthesiologists Ltd
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1881705937
PECOS PAC ID: 3870554298
Enrollment ID: O20041020000126
Entity NameHuntley Anesthesia Associates Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1205282019
PECOS PAC ID: 0143515825
Enrollment ID: O20160819000149

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 B Weems 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 B Weems, MD
Po Box 735263,
Chicago, IL 60673-5263

Ph: (815) 398-9491		Dr William B Weems, MD
5875 E Riverside Blvd,
Rockford, IL 61114-4937

Ph: (815) 398-9491

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
Mark J. Kellen, 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

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.