Fred Harrison Williams, MD - Medicare Gastroenterology in Chesterfield, MO

Fred Harrison Williams, MD is a medicare enrolled "Internal Medicine - Gastroenterology" physician in Chesterfield, Missouri. He went to University Of Missouri, Kansas City, School Of Medicine and graduated in 1986 and has 38 years of diverse experience with area of expertise as Gastroenterology. He is a member of the group practice Gateway Gastroenterology Inc and his current practice location is 121 Saint Lukes Center Dr, Suite 406, Chesterfield, Missouri. You can reach out to his office (for appointments etc.) via phone at (314) 432-5900.

Fred Harrison Williams is licensed to practice in Missouri (license number 118411) 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 1386644326.

Contact Information

Fred Harrison Williams, MD
121 Saint Lukes Center Dr, Suite 406,
Chesterfield, MO 63017-3509
(314) 432-5900
(314) 434-2679



Physician's Profile

Full NameFred Harrison Williams
GenderMale
SpecialityGastroenterology
Experience38 Years
Location121 Saint Lukes Center Dr, Chesterfield, Missouri
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:
  • Fred Harrison Williams attended and graduated from University Of Missouri, Kansas City, School Of Medicine in 1986
  NPI Data:
  • NPI Number: 1386644326
  • Provider Enumeration Date: 07/29/2005
  • Last Update Date: 04/12/2017
  Medicare PECOS Information:
  • PECOS PAC ID: 2961580261
  • Enrollment ID: I20100609000414

Medical Identifiers

Medical identifiers for Fred Harrison Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1386644326NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207RG0100XInternal Medicine - Gastroenterology 118411 (Missouri)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
St Lukes HospitalChesterfield, MOHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Gateway Gastroenterology Inc266844871310

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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. Fred Harrison Williams allows following entities to bill medicare on his behalf.
Entity NameGateway Gastroenterology Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1043250400
PECOS PAC ID: 2668448713
Enrollment ID: O20040909000422

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Entity NameUrgent Specialists Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1255820510
PECOS PAC ID: 4486995800
Enrollment ID: O20190412001473

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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. Fred Harrison 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
Fred Harrison Williams, MD
121 Saint Lukes Center Dr, Suite 406,
Chesterfield, MO 63017-3518

Ph: (314) 529-4900
Fred Harrison Williams, MD
121 Saint Lukes Center Dr, Suite 406,
Chesterfield, MO 63017-3509

Ph: (314) 432-5900

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Internal Medicine Doctors in Chesterfield, MO

Lovepreet Singh Randhawa, MD
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 224 S Woods Mill Rd, Chesterfield, MO 63017
Phone: 314-205-6050    Fax: 314-205-6350
Rachel Lynn Fishman Oiknine, M.D.
Gastroenterology
Medicare: Accepting Medicare Assignments
Practice Location: 222 S Woods Mill Rd, Suite 410n, Chesterfield, MO 63017
Phone: 314-469-6224    Fax: 314-469-0744
Xiaoling Wu, MD
Gastroenterology
Medicare: Medicare Enrolled
Practice Location: 224 S Woods Mill Rd, Suite 370 South, Chesterfield, MO 63017
Phone: 314-878-2460    
Daniel B Bauwens, MD
Gastroenterology
Medicare: Medicare Enrolled
Practice Location: 232 S Woods Mill Rd, Chesterfield, MO 63017
Phone: 314-576-5023    
Michael Carl Fusco, M.D.
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 14528 S Outer 40, Suite 300, Chesterfield, MO 63017
Phone: 314-214-8100    Fax: 314-214-8233
David H Cort, M.D.
Gastroenterology
Medicare: Medicare Enrolled
Practice Location: 226 S Woods Mill Rd, Suite 52 West, Chesterfield, MO 63017
Phone: 314-434-2399    Fax: 314-434-5653
Meghashyam Jayateerth Koti, MD
Gastroenterology
Medicare: Not Enrolled in Medicare
Practice Location: 15740 S Outer 40 Rd # C, Chesterfield, MO 63017
Phone: 636-735-4963    

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