STEPHEN CLAY WILLIAMS M.D.
NPI 1184778284
Psychiatry & Neurology - Psychiatry in Santa Rosa, CA

Q: What is Stephen Williams's NPI number?

The NPI number for Stephen Williams is 1184778284. It was assigned to this individual provider in the NPPES registry on January 23, 2007.

Q: What is Stephen Williams's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Q: When was this NPI record last updated?

The NPPES record for Stephen Williams was last updated on July 9, 2021. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since January 23, 2007PECOS EnrolledAccepts Medicare Assignment

480 TESCONI CIR STE B, SANTA ROSA, CA 95401(707) 206-7268(707) 206-7254 Get Directions Write a Review

NPPES record last updated: July 9, 2021. Verified against the NPPES registry weekly; last sync: July 26, 2026.

Record update history: Jul 9, 2021, Aug 25, 2016 (2 updates tracked since 2016).

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About Stephen Clay Williams M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

STEPHEN CLAY WILLIAMS M.D. (NPI 1184778284) is an individual psychiatry provider in Santa Rosa, California, licensed in California (A55291) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS and is a graduate of Rush Medical College Of Rush University (1994).

NPPES Registry Identity

NPI1184778284

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameSTEPHEN CLAY WILLIAMSCredential: M.D.

Location Address480 TESCONI CIR STE BSanta Rosa, CA 95401-4691

Mailing Address480 Tesconi Cir Ste BSanta Rosa, CA 95401-4691 · (707) 206-7268 · Fax (707) 206-7254

Phone(707) 206-7268

Fax(707) 206-7254

Sole ProprietorNo

Medical School CMSRush Medical College Of Rush UniversityGraduated 1994

Enumeration DateJanuary 23, 2007

Last NPPES UpdateJuly 9, 20212 updates tracked since enumeration

NPPES CertifiedJuly 9, 2021

✔ NPI 1184778284 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

Licenses✔ Licensed in CA · A55291✔ Licensed in OH · 35.129375

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

480 TESCONI CIR STE B, Santa Rosa, CA 95401

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource, MedMutual, Molina Healthcare and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Stephen Clay Williams M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2961440391

PECOS Enrollment IDI20160919001921

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes 99231

Follow-up hospital inpatient care is a daily service where a healthcare professional checks on your health progress during your hospital stay. Each session typically lasts 15 minutes, involving updates on your condition and adjustments to your treatment plan, if necessary.

195 services27 patients

Psychiatric diagnostic evaluation 90791

A psychiatric diagnostic evaluation is a thorough assessment used to identify any mental health conditions you may have. It involves a detailed discussion about your symptoms, thoughts, feelings and behavior patterns. Your medical history and family's mental health history are also considered.

26 services23 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

13 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95401 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$187.01 typical visit price

range $63.04 – $187.01

Typical copayment $46.75 (range $15.76 – $46.75)

Most-billed visit code 99205

Established Patient

$77.94 typical visit price

range $21.02 – $153.40

Typical copayment $19.48 (range $5.25 – $38.35)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MR. JOHN DAVID WILDGUST RN, MSN, PHN, PMHNP

Nurse Practitioner (Psychiatric/Mental Health)