Dr William S Clark, DO - Medicare Emergency Medicine in Escalon, CA

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Dr William S Clark, DO is a medicare enrolled "Emergency Medicine" physician in Escalon, California. He went to Chicago College Of Osteopathy and graduated in 2000 and has 24 years of diverse experience with area of expertise as Emergency Medicine. He is a member of the group practice Cep America - California and his current practice location is 1631 4th St, Escalon, California. You can reach out to his office (for appointments etc.) via phone at (209) 838-3434.

Dr William S Clark is licensed to practice in California (license number 20A8748) 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 1770690430.

Contact Information

Dr William S Clark, DO
1631 4th St,
Escalon, CA 95320-2007
(209) 838-3434
Not Available

Map and Direction




Physician's Profile

Full NameDr William S Clark
GenderMale
SpecialityEmergency Medicine
Experience24 Years
Location1631 4th St, Escalon, California
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 William S Clark attended and graduated from Chicago College Of Osteopathy in 2000
  NPI Data:
  • NPI Number: 1770690430
  • Provider Enumeration Date: 08/25/2006
  • Last Update Date: 05/12/2022
  Medicare PECOS Information:
  • PECOS PAC ID: 4981593464
  • Enrollment ID: I20041001000742

Medical Identifiers

Medical identifiers for Dr William S Clark such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1770690430NPI-NPPES
00AX87480MedicaidCA

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207P00000XEmergency Medicine 02002521A (Indiana)Secondary
101YA0400XCounselor - Addiction (substance Use Disorder) 20A8748 (California)Secondary
208D00000XGeneral Practice 20A8748 (California)Secondary
207P00000XEmergency Medicine 20A8748 (California)Primary

Medical Facilities Affiliation

Facility NameLocationFacility Type
Doctors Hospital Of MantecaManteca, CAHospital

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Cep America - California6103739131954

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 William S Clark allows following entities to bill medicare on his behalf.
Entity NameCep America - California
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1023063542
PECOS PAC ID: 6103739131
Enrollment ID: O20031106000520
Entity NameTeam Physicians Of California Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1447288345
PECOS PAC ID: 8224945084
Enrollment ID: O20040920000880
Entity NameClinic Services Of California Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1578958450
PECOS PAC ID: 7810209715
Enrollment ID: O20150707001394

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 William S Clark 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 William S Clark, DO
1235 Mchenry Ave,
Modesto, CA 95350-5370

Ph: (818) 398-8527		Dr William S Clark, DO
1631 4th St,
Escalon, CA 95320-2007

Ph: (209) 838-3434

Reviews and Comments


Emergency Medicine Doctors in Escalon, CA


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.