Patricia A Williams, MD - Medicare Family Practice in Fenton, MO

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Patricia A Williams, MD is a medicare enrolled "Emergency Medicine" physician in Fenton, Missouri. She went to University Of Missouri, Columbia School Of Medicine and graduated in 1992 and has 32 years of diverse experience with area of expertise as Family Practice. She is a member of the group practice Emergency Physicians Of St Lukes Llc and her current practice location is 1203 Smizer Mill Rd, Suite 100, Fenton, Missouri. You can reach out to her office (for appointments etc.) via phone at (636) 717-1414.

Patricia A Williams is licensed to practice in Missouri (license number 108993) and she also participates in the medicare program. She accepts medicare assignments (which means she accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance) and her NPI Number is 1275643553.

Contact Information

Patricia A Williams, MD
1203 Smizer Mill Rd, Suite 100,
Fenton, MO 63026-3483
(636) 717-1414
(636) 717-1420

Map and Direction




Physician's Profile

Full NamePatricia A Williams
GenderFemale
SpecialityFamily Practice
Experience32 Years
Location1203 Smizer Mill Rd, Fenton, Missouri
Accepts Medicare AssignmentsYes. She accepts the Medicare-approved amount; you will not be billed for any more than the Medicare deductible and coinsurance.
  Medical Education and Training:
  • Patricia A Williams attended and graduated from University Of Missouri, Columbia School Of Medicine in 1992
  NPI Data:
  • NPI Number: 1275643553
  • Provider Enumeration Date: 08/30/2006
  • Last Update Date: 04/01/2014
  Medicare PECOS Information:
  • PECOS PAC ID: 9335230481
  • Enrollment ID: I20070803000535

Medical Identifiers

Medical identifiers for Patricia A Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1275643553NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 108993 (Missouri)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
St Lukes HospitalChesterfield, MOHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Emergency Physicians Of St Lukes Llc377971414254

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. Patricia A Williams allows following entities to bill medicare on her behalf.
Entity NameMercy Clinic East Communities
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1073739041
PECOS PAC ID: 7214827922
Enrollment ID: O20070521000058
Entity NameTotal Access Urgent Care Pc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1962684886
PECOS PAC ID: 8820171929
Enrollment ID: O20080213000227
Entity NameEmergency Physicians Of St Lukes Llc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1215359815
PECOS PAC ID: 3779714142
Enrollment ID: O20140327001965

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. Patricia A 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
Patricia A Williams, MD
Po Box 18057b,
Saint Louis, MO 63150-0001

Ph: (314) 364-4200		Patricia A Williams, MD
1203 Smizer Mill Rd, Suite 100,
Fenton, MO 63026-3483

Ph: (636) 717-1414

Reviews and Comments


Emergency Medicine Doctors in Fenton, MO

James R Taylor, M.D.
Emergency Medicine
Medicare: Medicare Enrolled
Practice Location: 1015 Bowles Ave., Fenton, MO 63026
Phone: 636-496-2100    Fax: 636-496-4933
Dr. Stephen Slowik, DO
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1015 Bowles Ave, Fenton, MO 63026
Phone: 866-565-7739    Fax: 314-835-9728
Dr. Joseph Theodore Young, M.D.
Emergency Medicine
Medicare: Not Enrolled in Medicare
Practice Location: 1015 Bowles Ave, Fenton, MO 63026
Phone: 636-496-2000    Fax: 314-996-1681
Dr. Melissa K Stein, DO
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 714 Gravois Rd, Ste 100, Fenton, MO 63026
Phone: 636-326-6100    
Waleska Larice, M.D.
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1015 Bowles Ave, Fenton, MO 63026
Phone: 636-496-2000    
Dr. Robert Brunton Smith, M.D,
Emergency Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 1015 Bowles Ave, Fenton, MO 63026
Phone: 636-496-2100    

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.