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DR. MARK STEPHEN THOMA MD
NPI 1467575233
Anesthesiology in San Francisco, CA

Active since April 09, 2007PECOS Enrolled
2425 GEARY BLVD, SAN FRANCISCO, CA 94115(415) 476-3235 Get Directions Write a Review

NPPES record last updated: December 21, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Mark Stephen Thoma Md NPPES

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

DR. MARK STEPHEN THOMA MD (NPI 1467575233) is an individual anesthesiology provider in San Francisco, California, licensed in California (A91601) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1467575233
Entity TypeIndividualMale
Primary Taxonomy207L00000X
Provider Legal NameDR. MARK STEPHEN THOMACredential: MD
Location Address2425 GEARY BLVDSan Francisco, CA 94115-3358
Mailing AddressS-436, Box 0427, Ucsf Dept Of Anesthesia & Perioperative CareSan Francisco, CA 94143-0427 · (415) 476-3235
Phone(415) 476-3235
Sole ProprietorNo
Enumeration DateApril 9, 2007
Last NPPES UpdateDecember 21, 2021
NPPES CertifiedDecember 21, 2021
✔ NPI 1467575233 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · A91601
Definition
An anesthesiologist is trained to provide pain relief and maintenance, or restoration, of a stable condition during and immediately following an operation or an obstetric or diagnostic procedure. The anesthesiologist assesses the risk of the patient undergoing surgery and optimizes the patient's condition prior to, during and after surgery. In addition to these management responsibilities, the anesthesiologist provides medical management and consultation in pain management and critical care medicine. Anesthesiologists diagnose and treat acute, long-standing and cancer pain problems; diagnose and treat patients with critical illnesses or severe injuries; direct resuscitation in the care of patients with cardiac or respiratory emergencies, including the need for artificial ventilation; and supervise post-anesthesia recovery.
2425 GEARY BLVD, San Francisco, CA 94115
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Mark Stephen Thoma 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 Mark Thoma reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
0.2 mi
Internal Medicine
2238 GEARY
San Francisco, CA 94116
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1841373800 (415) 833-2200

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

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.

STEVEN PIROG MD
Student in an Organized Health Care Education/Training Program
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-2000
AARON LAM
Student in an Organized Health Care Education/Training Program
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-2000
DR. EMILY SU LEE MD
Student in an Organized Health Care Education/Training Program
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-3034
SOO-JEON CHOI
Pharmacist
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-2331
BRET KINSEY GORDEN LCSW
Social Worker
2425 GEARY BLVD, COORDINATION OF CARE SERVICES DEPARTMENT
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-9934
SRAAVYA KAKARLAPUDI MD
Student in an Organized Health Care Education/Training Program
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-2000
ELLORA ONG PHARMD.
Pharmacist
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-9700
KAISER FOUNDATION HOSPITALS
Pharmacy (Institutional Pharmacy)
2425 GEARY BLVD
SAN FRANCISCO, CA 94115
San Francisco County (415) 833-4255

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 Mark Thoma's NPI number?

The NPI number for Mark Thoma is 1467575233. It was assigned to this individual provider in the NPPES registry on April 9, 2007.

Where is Mark Thoma located?

Mark Thoma practices at 2425 Geary Blvd, San Francisco, CA 94115. The listed phone number is (415) 476-3235.

What is Mark Thoma's specialty?

The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.

Is Mark Thoma enrolled in Medicare?

Yes. Mark Thoma is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Mark Thoma's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mark Thoma reassigns Medicare benefits to Permanente Medical Group Inc (San Francisco, CA). 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 Mark Thoma's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Mark Thoma was last updated on December 21, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.