Dr Clark L Williams, MD - Medicare Emergency Medicine in Lancaster, WI

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Dr Clark L Williams, MD is a medicare enrolled "Emergency Medicine" physician in Lancaster, Wisconsin. He went to University Of Wisconsin School Of Medicine and graduated in 1999 and has 25 years of diverse experience with area of expertise as Emergency Medicine. He is a member of the group practice Central Community Hospital and his current practice location is 507 S Monroe St, Lancaster, Wisconsin. You can reach out to his office (for appointments etc.) via phone at (608) 723-2143.

Dr Clark L Williams is licensed to practice in California (license number A84769) 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 1710911417.

Contact Information

Dr Clark L Williams, MD
507 S Monroe St,
Lancaster, WI 53813-2054
(608) 723-2143
Not Available

Map and Direction




Physician's Profile

Full NameDr Clark L Williams
GenderMale
SpecialityEmergency Medicine
Experience25 Years
Location507 S Monroe St, Lancaster, 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 Clark L Williams attended and graduated from University Of Wisconsin School Of Medicine in 1999
  NPI Data:
  • NPI Number: 1710911417
  • Provider Enumeration Date: 07/10/2006
  • Last Update Date: 01/25/2023
  Medicare PECOS Information:
  • PECOS PAC ID: 0749173151
  • Enrollment ID: I20070521000078

Medical Identifiers

Medical identifiers for Dr Clark L Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1710911417NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine A84769 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Grant Regional Health CenterLancaster, WIHospital
Mercyone Elkader Medical CenterElkader, IAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Central Community Hospital105220637214

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 Clark L Williams allows following entities to bill medicare on his behalf.
Entity NameSpencer Municipal Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1396732186
PECOS PAC ID: 4183533060
Enrollment ID: O20040128000325
Entity NameCentral Community Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1578600961
PECOS PAC ID: 1052206372
Enrollment ID: O20040217000210

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 Clark L 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 Clark L Williams, MD
507 S Monroe St,
Lancaster, WI 53813-2054

Ph: (608) 723-2143		Dr Clark L Williams, MD
507 S Monroe St,
Lancaster, WI 53813-2054

Ph: (608) 723-2143

Reviews and Comments


Emergency Medicine Doctors in Lancaster, WI


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.