Stephen Clay Williams, MD - Medicare Psychiatry & Neurology in Santa Rosa, CA

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Stephen Clay Williams, MD is a medicare enrolled "Psychiatry & Neurology - Psychiatry" physician in Santa Rosa, California. His current practice location is 480 Tesconi Cir Ste B, Santa Rosa, California. You can reach out to his office (for appointments etc.) via phone at (707) 206-7268.

Stephen Clay Williams is licensed to practice in California (license number A55291) 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 1184778284.

Contact Information

Stephen Clay Williams, MD
480 Tesconi Cir Ste B,
Santa Rosa, CA 95401-4691
(707) 206-7268
(707) 206-7254

Map and Direction




Physician's Profile

Full NameStephen Clay Williams
GenderMale
SpecialityPsychiatry & Neurology - Psychiatry
Location480 Tesconi Cir Ste B, Santa Rosa, California
Accepts Medicare AssignmentsMedicare enrolled and may accept medicare through third-party reassignment. May prescribe medicare part D drugs.
  NPI Data:
  • NPI Number: 1184778284
  • Provider Enumeration Date: 01/23/2007
  • Last Update Date: 07/09/2021
  Medicare PECOS Information:
  • PECOS PAC ID: 2961440391
  • Enrollment ID: I20050418000622

Medical Identifiers

Medical identifiers for Stephen Clay Williams such as npi, medicare ID, medicare PIN, medicaid, etc.
IdentifierTypeStateIssuer
1184778284NPI-NPPES

Medical Taxonomies and Licenses

TaxonomyTypeLicense (State)Status
2084P0800XPsychiatry & Neurology - Psychiatry 35.129375 (Ohio)Secondary
2084P0800XPsychiatry & Neurology - Psychiatry A55291 (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. Stephen Clay Williams allows following entities to bill medicare on his behalf.
Entity NameCamarena Health
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1891778114
PECOS PAC ID: 4880584317
Enrollment ID: O20040318000523
Entity NameSiyan Clinical Corporation
Entity TypePart B Supplier - Clinic/group Practice
Entity IdentifiersNPI Number: 1568732972
PECOS PAC ID: 0042470122
Enrollment ID: O20120327000847

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. Stephen Clay 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
Stephen Clay Williams, MD
480 Tesconi Cir Ste B,
Santa Rosa, CA 95401-4691

Ph: (707) 206-7268		Stephen Clay Williams, MD
480 Tesconi Cir Ste B,
Santa Rosa, CA 95401-4691

Ph: (707) 206-7268

Reviews and Comments


Psychiatry & Neurology Doctors in Santa Rosa, CA

Dr. Stevan Keram, M.D.
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Practice Location: 1160 N Dutton Ave, Suite 255, Santa Rosa, CA 95401
Phone: 707-526-8800    Fax: 707-526-8886
Barry G Pierce, M.D.
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Medicare: Not Enrolled in Medicare
Practice Location: 1260 N Dutton Ave, Santa Rosa, CA 95401
Phone: 707-525-9045    Fax: 707-525-0426
Michael Frederick Kozart,
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Practice Location: 3322 Chanate Rd, Santa Rosa, CA 95404
Phone: 707-565-4970    
Neil P. Ehrlich, M.D.
Psychiatry & Neurology
Medicare: Accepting Medicare Assignments
Practice Location: 3322 Chanate Rd., Santa Rosa, CA 95404
Phone: 707-565-4741    
Dr. Robert S. Gardner, M.D.
Psychiatry & Neurology
Medicare: Not Enrolled in Medicare
Practice Location: 525 College Ave, 211, Santa Rosa, CA 95404
Phone: 707-575-7647    Fax: 707-575-7739
John F. Cassidy, MD
Psychiatry & Neurology
Medicare: Medicare Enrolled
Practice Location: 401 Bicentennial Way, Santa Rosa, CA 95403
Phone: 707-571-4000    
Dr. Nandini Lee Rao, MD
Psychiatry & Neurology
Medicare: Medicare Enrolled
Practice Location: 401 Bicentennial Way, Santa Rosa, CA 95403
Phone: 707-571-3778    Fax: 707-571-3799

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.