Dr Mark Williams, MD - Medicare Psychiatry & Neurology in Pomona, CA

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Dr Mark Williams, MD is a medicare enrolled "Psychiatry & Neurology - Psychiatry" physician in Pomona, California. His current practice location is 2008 N Garey Ave, Pomona, California. You can reach out to his office (for appointments etc.) via phone at (909) 623-6131.

Dr Mark Williams is licensed to practice in California (license number A74958) and he also participates in the medicare program. He does not accept medicare assignments directly but he may accept medicare through third-party (refer to Reassignment section below) and may also prescribe medicare part D drugs. His NPI Number is 1306919584.

Contact Information

Dr Mark Williams, MD
2008 N Garey Ave,
Pomona, CA 91767-2722
(909) 623-6131
Not Available

Map and Direction




Physician's Profile

Full NameDr Mark Williams
GenderMale
SpecialityPsychiatry & Neurology - Psychiatry
Location2008 N Garey Ave, Pomona, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1306919584
  • Provider Enumeration Date: 11/16/2006
  • Last Update Date: 01/30/2008
  Medicare PECOS Information:
  • PECOS PAC ID: 8224128145
  • Enrollment ID: I20071215000262

Medical Identifiers

Medical identifiers for Dr Mark Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1306919584NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2084P0800XPsychiatry & Neurology - Psychiatry A74958 (California)Primary

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 Mark Williams allows following entities to bill medicare on his behalf.
Entity NameEnki Health Services Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1932230638
PECOS PAC ID: 8022926559
Enrollment ID: O20040117000204
Entity NamePacific Clinics
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1255496105
PECOS PAC ID: 4082008420
Enrollment ID: O20220228001926

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 Mark 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 Mark Williams, MD
280 S Euclid Ave Apt 125,
Pasadena, CA 91101-2788

Ph: (909) 623-6131		Dr Mark Williams, MD
2008 N Garey Ave,
Pomona, CA 91767-2722

Ph: (909) 623-6131

Reviews and Comments


Psychiatry & Neurology Doctors in Pomona, CA

Dr. Carlos A Muralles, M.D.
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 2008 N Garey Ave, Pomona, CA 91767
Phone: 909-623-6131    
Charoskhon Turabova,
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 2895 N Towne Ave, Pomona, CA 91767
Phone: 909-982-2719    
Dr. Jonson J Lin, M.D., D.C.
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 2008 N Garey Ave, Pomona, CA 91767
Phone: 909-623-6131    Fax: 909-865-9281
Dr. Heather Miller Kurera, D.O.
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 831 E Arrow Hwy, Pomona, CA 91767
Phone: 909-398-4383    Fax: 909-398-0127
Dr. Carlos A Pieroni, M.D
Psychiatry & Neurology
Medicare: Not Enrolled in Medicare
Practice Location: 2008 N Garey Ave, Pomona, CA 91767
Phone: 909-623-6131    
Dr. Michael Hany Salib, MD
Psychiatry & Neurology
Medicare: May Accept Medicare Assignments
Practice Location: 2008 N Garey Ave, Pomona, CA 91767
Phone: 909-623-6131    

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.

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