Dr John Byron Williams, MD - Medicare Gastroenterology in Madison, WI

Dr John Byron Williams, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Madison, Wisconsin. He went to Saint Louis University School Of Medicine and graduated in 2000 and has 24 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice University Of Wisconsin Medical Foundation Inc and his current practice location is 20 S Park St, Suite 207, Madison, Wisconsin. You can reach out to his office (for appointments etc.) via phone at (608) 287-2680.

Dr John Byron Williams is licensed to practice in Wisconsin (license number 43694-020) 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 1265516421.

Contact Information

Dr John Byron Williams, MD
20 S Park St, Suite 207,
Madison, WI 53715-1348
(608) 287-2680
Not Available



Physician's Profile

Full NameDr John Byron Williams
GenderMale
SpecialityGastroenterology
Experience24 Years
Location20 S Park St, Madison, 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:
  • Dr John Byron Williams attended and graduated from Saint Louis University School Of Medicine in 2000
  NPI Data:
  • NPI Number: 1265516421
  • Provider Enumeration Date: 10/24/2006
  • Last Update Date: 01/27/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 9234220617
  • Enrollment ID: I20070814000788

Medical Identifiers

Medical identifiers for Dr John Byron Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1265516421NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology 43694-020 (Wisconsin)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Meriter HospitalMadison, WIHospital
University Of Wi Hospitals & Clinics AuthorityMadison, WIHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
University Of Wisconsin Medical Foundation Inc66087854642164

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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 John Byron Williams allows following entities to bill medicare on his behalf.
Entity NameUniversity Of Wisconsin Medical Foundation Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1598784555
PECOS PAC ID: 6608785464
Enrollment ID: O20031111000435

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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. Dr John Byron 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
Dr John Byron Williams, MD
20 S Park St, Suite 207,
Madison, WI 53715-1348

Ph: () -
Dr John Byron Williams, MD
20 S Park St, Suite 207,
Madison, WI 53715-1348

Ph: (608) 287-2680

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Internal Medicine Doctors in Madison, WI

Prof. Marvin Lyle Birnbaum, MD
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 3330 University Ave, Suite 300, Madison, WI 53705
Phone: 608-263-9641    Fax: 608-265-4429
Yingyu Gao, MD
Gastroenterology
Medicare: Medicare Enrolled
Practice Location: 600 Highland Ave, Madison, WI 53792
Phone: 608-263-6400    
Dr. Sam Joseph Lubner, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 600 Highland Ave, Madison, WI 53792
Phone: 608-265-1700    
Randy S Heidel, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 20 S Park St, Madison, WI 53715
Phone: 608-287-2250    Fax: 608-287-2438
Benjamin Kleiber, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 700 S Park St, Dean & St. Mary's Outpatient Center, Madison, WI 53715
Phone: 608-260-2900    Fax: 608-260-2956
N Thomas Casper, MD
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 3102 Meriter Way, Madison, WI 53719
Phone: 608-417-8800    
Philip Tepper Cohen, M.D.
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 5154 Juneau Rd, Madison, WI 53705
Phone: 608-441-2512    Fax: 608-441-2512

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