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SVETLANA TROITSKAIA-WILLIAMS MD
NPI 1922145671
Psychiatry & Neurology - Psychiatry in San Francisco, CA

Active since January 31, 2007PECOS Enrolled
842 CALIFORNIA ST, SAN FRANCISCO, CA 94108(415) 391-7703 Get Directions Write a Review

NPPES record last updated: January 9, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Svetlana Troitskaia-williams Md NPPES

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

SVETLANA TROITSKAIA-WILLIAMS MD (NPI 1922145671) is an individual psychiatry provider in San Francisco, California, licensed in California (A81124) and active in the NPI registry since January 2007. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1922145671
Entity TypeIndividualFemale
Primary Taxonomy2084P0800X
Provider Legal NameSVETLANA TROITSKAIA-WILLIAMSCredential: MD
Location Address842 CALIFORNIA STSan Francisco, CA 94108-2315
Mailing Address1221 Jones St, Apt.5gSan Francisco, CA 94109-4228 · (415) 971-0380 · Fax (415) 399-9774
Phone(415) 391-7703
Sole ProprietorYes
Enumeration DateJanuary 31, 2007
Last NPPES UpdateJanuary 9, 2026
NPPES CertifiedJanuary 9, 2026
✔ NPI 1922145671 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in CA · A81124
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.
842 CALIFORNIA ST, San Francisco, CA 94108
Open in Google Maps ↗

Other Identifiers 1

Other349667CA · Mhn

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield, CareSource, Florida Blue (BlueCross BlueShield FL) and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Svetlana Troitskaia-williams Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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.

Medicare Billing Reassignment

Medicare enrollment records show Svetlana Troitskaia-williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Forefront - Murdock Medical Services PC
1,483 mi
Psychiatry
1717 MAIN ST STE 5850
Dallas, TX 75201
  • Reassigned Medicare billing, California enrollment
  • 16 clinicians in this Medicare group
NPI 1720581473 (972) 449-0540

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94108 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
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
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.

Other Providers at the Same Location NPPES 17

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

DR. WILLIAM GARDNER PSYD
Psychologist (Clinical)
842 CALIFORNIA ST
SAN FRANCISCO, CA 94108
San Francisco County (415) 323-5750
MS. TALI S SEDGWICK RD
Dietitian, Registered
842 CALIFORNIA ST
SAN FRANCISCO, CA 94108
San Francisco County (415) 498-0328
MS. JILL FLORES MS CCC-SLP
Speech-Language Pathologist
842 CALIFORNIA ST
SAN FRANCISCO, CA 94108
San Francisco County (415) 690-9249
CYNDI LOWE
Psychologist (Clinical)
842 CALIFORNIA ST
SAN FRANCISCO, CA 94108
San Francisco County (510) 705-3015
MRS. MEGAN ASHLEY SCHENCK LCSW
Social Worker (Clinical)
842 CALIFORNIA ST
SAN FRANCISCO, CA 94108
San Francisco County (415) 513-0853
NATHAN VILLARANTE LMFT
Marriage & Family Therapist
842 CALIFORNIA ST
SAN FRANCISCO, CA 94108
San Francisco County (415) 748-5421
DR. SHI-MING PEGGY CHIN-ORTIZ PSY.D.
Psychologist (Clinical)
842 CALIFORNIA ST
SAN FRANCISCO, CA 94108
San Francisco County (415) 869-2895
HELEN JS LIN LCSW
Social Worker (Clinical)
842 CALIFORNIA ST
SAN FRANCISCO, CA 94108
San Francisco County (415) 577-9579

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Svetlana Troitskaia-williams's NPI number?

The NPI number for Svetlana Troitskaia-williams is 1922145671. It was assigned to this individual provider in the NPPES registry on January 31, 2007.

Where is Svetlana Troitskaia-williams located?

Svetlana Troitskaia-williams practices at 842 California St, San Francisco, CA 94108. The listed phone number is (415) 391-7703.

What is Svetlana Troitskaia-williams's specialty?

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

Is Svetlana Troitskaia-williams enrolled in Medicare?

Yes. Svetlana Troitskaia-williams is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Svetlana Troitskaia-williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Svetlana Troitskaia-williams reassigns Medicare benefits to Forefront - Murdock Medical Services PC (Dallas, TX). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Svetlana Troitskaia-williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Svetlana Troitskaia-williams accept?

Health plans from Anthem Blue Cross and Blue Shield, CareSource, Florida Blue (BlueCross BlueShield FL), Florida Blue HMO (a BlueCross BlueShield FL company) and UnitedHealthcare list Svetlana Troitskaia-williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Svetlana Troitskaia-williams was last updated on January 9, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.