Dr Charles R Williams, MD - Medicare Anesthesiology in Whittier, CA

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Dr Charles R Williams, MD is a medicare enrolled "Anesthesiology - Pain Medicine" physician in Whittier, California. His current practice location is 6331 Greenleaf Ave # 8, Whittier, California. You can reach out to his office (for appointments etc.) via phone at (562) 556-8114.

Dr Charles R Williams is licensed to practice in California (license number G51191) 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 1760526743.

Contact Information

Dr Charles R Williams, MD
6331 Greenleaf Ave # 8,
Whittier, CA 90601-3553
(562) 556-8114
Not Available

Map and Direction




Physician's Profile

Full NameDr Charles R Williams
GenderMale
SpecialityAnesthesiology - Pain Medicine
Location6331 Greenleaf Ave # 8, Whittier, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1760526743
  • Provider Enumeration Date: 02/16/2007
  • Last Update Date: 04/11/2025
  Medicare PECOS Information:
  • PECOS PAC ID: 9436109683
  • Enrollment ID: I20070710000307

Medical Identifiers

Medical identifiers for Dr Charles R Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1760526743NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
207LP2900XAnesthesiology - Pain Medicine G51191 (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 Charles R Williams allows following entities to bill medicare on his behalf.
Entity NameAllied Anesthesia Medical Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1346267267
PECOS PAC ID: 6103728407
Enrollment ID: O20040126001001
Entity NameSouthern Monterey County Memorial Hospital
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1114917564
PECOS PAC ID: 7719883461
Enrollment ID: O20050216000803
Entity NameFirst Choice Physician Partners
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1104183052
PECOS PAC ID: 0941465322
Enrollment ID: O20120710000480
Entity NamePontine Incorporated
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1053757609
PECOS PAC ID: 1052550266
Enrollment ID: O20130722000133
Entity NamePrecision Anesthesia Group Inc
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1205253929
PECOS PAC ID: 6204145105
Enrollment ID: O20151015001459
Entity NameOak Creek Anesthesia Services, Inc.
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1619589512
PECOS PAC ID: 9739509407
Enrollment ID: O20201019001247

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 Charles R 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 Charles R Williams, MD
8816 Foothill Blvd Ste 103,
Rancho Cucamonga, CA 91730-7199

Ph: (909) 484-2865		Dr Charles R Williams, MD
6331 Greenleaf Ave # 8,
Whittier, CA 90601-3553

Ph: (562) 556-8114

Reviews and Comments


Anesthesiology Doctors in Whittier, CA

Mrs. Luz G Ramirez, MD
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 9080 Colima Road, Whittier, CA 90605
Phone: 562-945-3561    Fax: 562-696-3193
John Randall Coleman, M.D.
Anesthesiology
Medicare: Not Enrolled in Medicare
Practice Location: 12401 Washington Blvd, Whittier, CA 90602
Phone: 562-698-0811    
Dr. Lancelot L Williams, M.D.
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 12401 Washington Blvd, Whittier, CA 90602
Phone: 562-698-0811    
Dr. Henry Cola, M.D.
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 12401 Washington Blvd, Whittier, CA 90602
Phone: 562-698-0811    
Dr. Thomas Chien Lee, M.D.
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 12401 Washington Blvd, Whittier, CA 90602
Phone: 562-698-0811    
Dr. George Glenn Izmirian, M.D.
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 15141 Whittier Blvd, Whittier, CA 90603
Phone: 562-945-2832    
Mr. Edward H Lee, D.O.
Anesthesiology
Medicare: Accepting Medicare Assignments
Practice Location: 9080 Colima Rd, Whittier, CA 90605
Phone: 562-945-3561    

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.