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DR. AMY ELLEN WONG M.D.
NPI 1912181553
Obstetrics & Gynecology - Maternal & Fetal Medicine in Mountain View, CA

Active since December 18, 2007PECOS Enrolled
2485 HOSPITAL DRIVE, SUITE 231, MOUNTAIN VIEW, CA 94040(650) 934-7000 Get Directions Write a Review

NPPES record last updated: August 16, 2019. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. Amy Ellen Wong M.d. NPPES

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

DR. AMY ELLEN WONG M.D. (NPI 1912181553) is an individual maternal & fetal medicine provider in Mountain View, California, licensed in California (A101197) and active in the NPI registry since December 2007. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1912181553
Entity TypeIndividualFemale
Primary Taxonomy207VM0101X
Provider Legal NameDR. AMY ELLEN WONGCredential: M.D.
Location Address2485 HOSPITAL DRIVE, SUITE 231Mountain View, CA 94040-4103
Mailing Address325 Distel CirLos Altos, CA 94022-1408
Phone(650) 934-7000
Sole ProprietorNo
Enumeration DateDecember 18, 2007
Last NPPES UpdateAugust 16, 2019
✔ NPI 1912181553 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyObstetrics & Gynecology · Maternal & Fetal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207VM0101X
License✔ Licensed in CA · A101197
Definition
An obstetrician/gynecologist who cares for, or provides consultation on, patients with complications of pregnancy. This specialist has advanced knowledge of the obstetrical, medical and surgical complications of pregnancy and their effect on both the mother and the fetus. The specialist also possesses expertise in the most current diagnostic and treatment modalities used in the care of patients with complicated pregnancies.
Also ListedObstetrics & GynecologyTaxonomy 207V00000X · License A101197 (CA)
2485 HOSPITAL DRIVE, Mountain View, CA 94040
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Amy Ellen Wong M.d. 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 Amy Wong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Sutter Bay Medical Foundation
1.1 mi
Ambulatory Surgical
701 E EL CAMINO REAL, SUITE 1 NORTHWEST
Mountain View, CA 94040
  • Reassigned Medicare billing, California enrollment
  • Also billed through NPI 1013950807 (California)
  • 373 clinicians in this Medicare group
NPI 1982845186 (650) 404-8444

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 94040 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
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$86.56 typical visit price
range $23.96 – $169.60
Typical copayment $21.64 (range $5.99 – $42.40)
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 3

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

PER SANDBERG M.D
Obstetrics & Gynecology (Maternal & Fetal Medicine)
2485 HOSPITAL DRIVE, SUITE 231
MOUNTAIN VIEW, CA 94040
Santa Clara County (650) 934-7000
LIZA KUNZ MD
Obstetrics & Gynecology (Maternal & Fetal Medicine)
2485 HOSPITAL DRIVE, STE 231
MOUNTAIN VIEW, CA 94040
Santa Clara County (650) 404-8210
MARIANNE FRANCOISE VIVIEN LCGC
Genetic Counselor, MS
2485 HOSPITAL DRIVE, SUITE 231
MOUNTAIN VIEW, CA 94040
Santa Clara County (650) 404-8210

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 Amy Wong's NPI number?

The NPI number for Amy Wong is 1912181553. It was assigned to this individual provider in the NPPES registry on December 18, 2007.

Where is Amy Wong located?

Amy Wong practices at 2485 Hospital Drive Suite 231, Mountain View, CA 94040. The listed phone number is (650) 934-7000.

What is Amy Wong's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology, specializing in Maternal & Fetal Medicine, with taxonomy code 207VM0101X.

Is Amy Wong enrolled in Medicare?

Yes. Amy Wong is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Amy Wong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Amy Wong reassigns Medicare benefits to Sutter Bay Medical Foundation (Mountain View, 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 Amy Wong'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 Amy Wong was last updated on August 16, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.