William Craig Paley, DO - Medicare Family Practice in Ontario, CA

William Craig Paley, DO is a medicare enrolled "Family Medicine" physician in Ontario, California. He went to Midwestern University, Chicago College Of Osteopathic Med and graduated in 1981 and has 43 years of diverse experience with area of expertise as Family Practice. He is a member of the group practice Unicare Community Health Center, Inc. and his current practice location is 437 N Euclid Ave, Ontario, California. You can reach out to his office (for appointments etc.) via phone at (909) 988-2555.

William Craig Paley is licensed to practice in Illinois (license number 20A4932) 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 1124105754.

Contact Information

William Craig Paley, DO
437 N Euclid Ave,
Ontario, CA 91762-3456
(909) 988-2555
(909) 988-4447

Map and Direction




Physician's Profile

Full NameWilliam Craig Paley
GenderMale
SpecialityFamily Practice
Experience43 Years
Location437 N Euclid Ave, Ontario, 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:
  • William Craig Paley attended and graduated from Midwestern University, Chicago College Of Osteopathic Med in 1981
  NPI Data:
  • NPI Number: 1124105754
  • Provider Enumeration Date: 11/01/2006
  • Last Update Date: 02/27/2024
  Medicare PECOS Information:
  • PECOS PAC ID: 9638061435
  • Enrollment ID: I20040326000661

Medical Identifiers

Medical identifiers for William Craig Paley such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1124105754NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207Q00000XFamily Medicine 20A4932 (Illinois)Primary

Group Practice Association

Group Practice NameGroup PECOS PAC IDNo. of Members
Unicare Community Health Center, Inc.842636906731

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. William Craig Paley allows following entities to bill medicare on his behalf.
Entity NameUnicare Community Health Center, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1265854061
PECOS PAC ID: 8426369067
Enrollment ID: O20150623001589

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. William Craig Paley 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
William Craig Paley, DO
437 N Euclid Ave,
Ontario, CA 91762-3456

Ph: (909) 988-2555
William Craig Paley, DO
437 N Euclid Ave,
Ontario, CA 91762-3456

Ph: (909) 988-2555

Reviews and Comments


Family Medicine Doctors in Ontario, CA

Andrelee G. Taganas, M.D.
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Ruth Chambi - Hernandez, M.D.
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Medicare: Not Enrolled in Medicare
Practice Location: 1871 E 4th St, Ontario, CA 91764
Phone: 909-297-3337    Fax: 909-532-8171
Dr. Vache Chakmakian, M.D.
Family Medicine
Medicare: Medicare Enrolled
Practice Location: 437 N Euclid Ave, Ontario, CA 91762
Phone: 909-988-2555    
Naila Mubashar, M.D
Family Medicine
Medicare: Accepting Medicare Assignments
Practice Location: 437 N Euclid Ave, Ontario, CA 91762
Phone: 909-988-2555    

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.