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WEN MA
NPI 1992123798
Anesthesiology in Mountain View, CA

Active since March 31, 2014PECOS EnrolledAccepts Medicare Assignment
80.58/100
CMS Quality Rating
701 E EL CAMINO REAL, MOUNTAIN VIEW, CA 94040(650) 404-8444 Get Directions Write a Review

NPPES record last updated: January 7, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 7, 2025, Sep 25, 2024, Jun 17, 2019 and 1 more (4 updates tracked since 2019).

About Wen Ma NPPES

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

WEN MA (NPI 1992123798) is an individual anesthesiology provider in Mountain View, California, licensed in California (A137994) and active in the NPI registry since March 2014. She is enrolled in Medicare PECOS and is a graduate of University Of California, San Francisco School Of Medicine (2014).

NPPES Registry Identity

NPI1992123798
Entity TypeIndividualFemale
Primary Taxonomy207L00000X
Provider Legal NameWEN MA
Location Address701 E EL CAMINO REALMountain View, CA 94040-2833
Mailing AddressPo Box 276950Sacramento, CA 95827-6950
Phone(650) 404-8444
Sole ProprietorNo
Medical School CMSUniversity Of California, San Francisco School Of MedicineGraduated 2014
Enumeration DateMarch 31, 2014
Last NPPES UpdateJanuary 7, 20254 updates tracked since enumeration
NPPES CertifiedJanuary 7, 2025
✔ NPI 1992123798 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologyAllopathic & Osteopathic Physicians
Taxonomy Code207L00000X
License✔ Licensed in CA · A137994
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.
701 E EL CAMINO REAL, Mountain View, CA 94040
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Other Names 1

Other Name (5)Wendy Ma

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Wen Ma 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 ID42543795
PECOS Enrollment IDI20190611003550
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 Wen Ma reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Sutter Bay Medical Foundation
1.1 mi
Ambulatory Surgical
701 E EL CAMINO REAL, SUITE 1 NORTHWEST
Mountain View, CA 94040
NPI 1982845186 (650) 404-8444
County Of Santa Clara
2.5 mi
Federally Qualified Health Center (FQHC)
660 S FAIR OAKS AVE
Sunnyvale, CA 94086
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1588721500 (California), NPI 1629301346 (California)
  • 2,460 clinicians in this Medicare group
NPI 1336326974 (408) 885-5000

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

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

80.58/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality67.43
Promoting Interoperability100
Improvement Activities40
Cost46.5

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.

JULIA A CRONIN MD
Allergy & Immunology (Allergy)
701 E EL CAMINO REAL
MOUNTAIN VIEW, CA 94040
Santa Clara County (650) 934-7888
TIMOTHY NIEH DO
Family Medicine
701 E EL CAMINO REAL
MOUNTAIN VIEW, CA 94040
Santa Clara County (650) 404-8370
BRYAN HWANG MD
Radiology (Diagnostic Radiology)
701 E EL CAMINO REAL
MOUNTAIN VIEW, CA 94040
Santa Clara County (650) 934-7700
JOHN EARLE BARNES MD
Psychiatry & Neurology (Neurology)
701 E EL CAMINO REAL
MOUNTAIN VIEW, CA 94040
Santa Clara County (650) 934-7300
DR. NATE EUGENE KELLY M.D.
Anesthesiology
701 E EL CAMINO REAL
MOUNTAIN VIEW, CA 94040
Santa Clara County (650) 404-8444
ERIKA DESHMUKH MS, RD
Dietitian, Registered
701 E EL CAMINO REAL
MOUNTAIN VIEW, CA 94040
Santa Clara County (650) 934-7177
DR. SERGIO ALVAREZ MD
Emergency Medicine (Sports Medicine)
701 E EL CAMINO REAL
MOUNTAIN VIEW, CA 94040
Santa Clara County (650) 934-7111
DOANTRANG KIM NGUYEN
Physician Assistant
701 E EL CAMINO REAL
MOUNTAIN VIEW, CA 94040
Santa Clara County (650) 934-7575

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 Wen Ma's NPI number?

The NPI number for Wen Ma is 1992123798. It was assigned to this individual provider in the NPPES registry on March 31, 2014. The provider is also known as Wendy Ma.

Where is Wen Ma located?

Wen Ma practices at 701 E El Camino Real, Mountain View, CA 94040. The listed phone number is (650) 404-8444.

What is Wen Ma's specialty?

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

Is Wen Ma enrolled in Medicare?

Yes. Wen Ma is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Wen Ma's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Wen Ma reassigns Medicare benefits to 2 organizations: Sutter Bay Medical Foundation (Mountain View, CA) and County Of Santa Clara (Sunnyvale, CA). 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 Wen Ma'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 Wen Ma was last updated on January 7, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 21 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.