O'rell Ronald Williams, MD - Medicare Internal Medicine in Milwaukee, WI

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O'rell Ronald Williams, MD is a medicare enrolled "Internal Medicine" physician in Milwaukee, Wisconsin. He went to University Of Wisconsin School Of Medicine and graduated in 2001 and has 24 years of diverse experience with area of expertise as Internal Medicine. He is a member of the group practice Fort Healthcare Inc, Zenith Healthcare Sc, Advantage Physical Therapy And Sports Rehab, Llc, Ascension Medical Group-southeast Wisconsin Inc and his current practice location is 5000 W Chambers St, Suite 2222, Milwaukee, Wisconsin. You can reach out to his office (for appointments etc.) via phone at (414) 874-4316.

O'rell Ronald Williams is licensed to practice in Wisconsin (license number 45383) 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 1972559755.

Contact Information

O'rell Ronald Williams, MD
5000 W Chambers St, Suite 2222,
Milwaukee, WI 53210-1650
(414) 874-4316
(414) 874-4160

Map and Direction




Physician's Profile

Full NameO'rell Ronald Williams
GenderMale
SpecialityInternal Medicine
Experience24 Years
Location5000 W Chambers St, Milwaukee, Wisconsin
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:
  • O'rell Ronald Williams attended and graduated from University Of Wisconsin School Of Medicine in 2001
  NPI Data:
  • NPI Number: 1972559755
  • Provider Enumeration Date: 05/25/2006
  • Last Update Date: 09/16/2010
  Medicare PECOS Information:
  • PECOS PAC ID: 3375511934
  • Enrollment ID: I20040921000930

Medical Identifiers

Medical identifiers for O'rell Ronald Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1972559755NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207R00000XInternal Medicine 45383 (Wisconsin)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Wheaton Franciscan HospiceMilwaukee, WIHospice
Ascension Se Wisconsin Hospital - St Joseph CampusMilwaukee, WIHospital
Fort Memorial HospitalFort atkinson, WIHospital
Chi Franciscan VillaSouth milwaukee, WINursing home

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Fort Healthcare Inc0840189718124
Zenith Healthcare Sc347677400113
Advantage Physical Therapy And Sports Rehab, Llc8022016336178
Ascension Medical Group-southeast Wisconsin Inc8628980943505

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. O'rell Ronald Williams allows following entities to bill medicare on his behalf.
Entity NameAscension Medical Group-southeast Wisconsin Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1609881077
PECOS PAC ID: 8628980943
Enrollment ID: O20031104000421
Entity NameFort Healthcare Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1417993361
PECOS PAC ID: 0840189718
Enrollment ID: O20040319001411
Entity NameZenith Healthcare Sc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1043610280
PECOS PAC ID: 3476774001
Enrollment ID: O20141024001238
Entity NameCompassus Aah Of Wisconsin V, Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1356958532
PECOS PAC ID: 7214341767
Enrollment ID: O20240618002035

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. O'rell Ronald Williams 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
O'rell Ronald Williams, MD
5000 W Chambers St, Suite 2222,
Milwaukee, WI 53210-1650

Ph: (414) 874-4316		O'rell Ronald Williams, MD
5000 W Chambers St, Suite 2222,
Milwaukee, WI 53210-1650

Ph: (414) 874-4316

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).

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.