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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

OLIVIA MARIE SONDERMAN MD, MPH
NPI 1629656954
Anesthesiology in San Francisco, CA

Active since March 30, 2021PECOS Enrolled
1101 VAN NESS AVE STE 1120, SAN FRANCISCO, CA 94109(415) 600-3954 Get Directions Write a Review

NPPES record last updated: September 2, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 2, 2026, Mar 30, 2021 (2 updates tracked since 2021).

About Olivia Marie Sonderman Md, Mph NPPES

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

OLIVIA MARIE SONDERMAN MD, MPH (NPI 1629656954) is an individual anesthesiology provider in San Francisco, California, licensed in California (A180479) and active in the NPI registry since March 2021. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1629656954
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameOLIVIA MARIE SONDERMANCredential: MD, MPH
Location Address1101 VAN NESS AVE STE 1120San Francisco, CA 94109-6919
Mailing Address1101 Van Ness Ave Ste 1120San Francisco, CA 94109-6919 · (415) 600-3954
Phone(415) 600-3954
Sole ProprietorNo
Enumeration DateMarch 30, 2021
Last NPPES UpdateSeptember 2, 20262 updates tracked since enumeration
NPPES CertifiedSeptember 2, 2026
✔ NPI 1629656954 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · A180479
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.
1101 VAN NESS AVE STE 1120, San Francisco, CA 94109
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Taro Health.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Olivia Marie Sonderman Md, Mph 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 Reassignments

2

Medicare enrollment records show Olivia Sonderman reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Massachusetts General Physicians Organization Inc
2,699 mi
Dermatology
55 FRUIT ST, BUL 2
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,360 clinicians in this Medicare group
NPI 1801874573 (617) 724-0287
The General Hospital Corporation
2,699 mi
General Acute Care Hospital
55 FRUIT ST, BULFINCH 360
Boston, MA 02114
  • Reassigned Medicare billing, Massachusetts enrollment
  • 6,234 clinicians in this Medicare group
NPI 1023049236 (617) 726-2000

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.

DR. SHANA MCCLAIN MD
Internal Medicine
1101 VAN NESS AVE STE 1120
SAN FRANCISCO, CA 94109
San Francisco County (415) 600-6000
ERIC HENRY HUANG MD
Internal Medicine
1101 VAN NESS AVE STE 1120
SAN FRANCISCO, CA 94109
San Francisco County (415) 600-6000
KAHEE JO MD
Internal Medicine
1101 VAN NESS AVE STE 1120
SAN FRANCISCO, CA 94109
San Francisco County (415) 600-6000
VIKRANT SINGH AULAKH MD
Student in an Organized Health Care Education/Training Program
1101 VAN NESS AVE STE 1120
SAN FRANCISCO, CA 94109
San Francisco County (415) 600-3954
COLLIN KLONK
Student in an Organized Health Care Education/Training Program
1101 VAN NESS AVE STE 1120
SAN FRANCISCO, CA 94109
San Francisco County (415) 600-3954
DR. GRANT WONG MD
Student in an Organized Health Care Education/Training Program
1101 VAN NESS AVE STE 1120
SAN FRANCISCO, CA 94109
San Francisco County (415) 600-3954
TONY WANG
Student in an Organized Health Care Education/Training Program
1101 VAN NESS AVE STE 1120
SAN FRANCISCO, CA 94109
San Francisco County (415) 600-6000
VIVIAN HO MD
Student in an Organized Health Care Education/Training Program
1101 VAN NESS AVE STE 1120
SAN FRANCISCO, CA 94109
San Francisco County (415) 600-3954

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 Olivia Sonderman's NPI number?

The NPI number for Olivia Sonderman is 1629656954. It was assigned to this individual provider in the NPPES registry on March 30, 2021.

Where is Olivia Sonderman located?

Olivia Sonderman practices at 1101 Van Ness Ave Ste 1120, San Francisco, CA 94109. The listed phone number is (415) 600-3954.

What is Olivia Sonderman's specialty?

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

Is Olivia Sonderman enrolled in Medicare?

Yes. Olivia Sonderman is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Olivia Sonderman's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Olivia Sonderman reassigns Medicare benefits to 2 organizations: Massachusetts General Physicians Organization Inc (Boston, MA) and The General Hospital Corporation (Boston, MA). Each 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 Olivia Sonderman's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Olivia Sonderman accept?

Health plans from Taro Health list Olivia Sonderman 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 Olivia Sonderman was last updated on September 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 52 days 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.