DR. MARRON CATHLEEN WONG M.D.
NPI 1871859843
Obstetrics & Gynecology in Fremont, CA

Q: What is Marron Wong's NPI number?

The NPI number for Marron Wong is 1871859843. It was assigned to this individual provider in the NPPES registry on April 4, 2012.

Q: What is Marron Wong's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Q: When was this NPI record last updated?

The NPPES record for Marron Wong was last updated on December 17, 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.

Active since April 04, 2012PECOS Enrolled

39400 PASEO PADRE PKWY, FREMONT, CA 94538(510) 248-3000 Get Directions Write a Review

NPPES record last updated: December 17, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Dec 17, 2021, Oct 17, 2018 (2 updates tracked since 2018).

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About Dr. Marron Cathleen Wong M.d. NPPES

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

DR. MARRON CATHLEEN WONG M.D. (NPI 1871859843) is an individual obstetrics & gynecology provider in Fremont, California, licensed in California (A128208) and active in the NPI registry since April 2012. She is enrolled in Medicare PECOS and maintains 2 additional practice locations.

NPPES Registry Identity

NPI1871859843

Entity TypeIndividualFemale

Primary Taxonomy207V00000X

Provider Legal NameDR. MARRON CATHLEEN WONGCredential: M.D.

Location Address39400 PASEO PADRE PKWYFremont, CA 94538-2310

Mailing Address39400 Paseo Padre PkwyFremont, CA 94538-2310

Phone(510) 248-3000

Sole ProprietorNo

Enumeration DateApril 4, 2012

Last NPPES UpdateDecember 17, 20212 updates tracked since enumeration

✔ NPI 1871859843 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians

Taxonomy Code207V00000X

License✔ Licensed in CA · A128208

Definition

An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.

39400 PASEO PADRE PKWY, Fremont, CA 94538

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Secondary Practice Locations 2

Location 11001 Potrero Ave # 6D, SFGH OB GYNSan Francisco, CA 94110-3518 · Phone (415) 206-3061

Location 239400 Paseo Padre PkwyFremont, CA 94538-2310 · Phone (510) 248-3000

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Marron Cathleen 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 Marron Wong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc

14 mi

Internal Medicine

1190 VETERANS BLVD
Redwood City, CA 94063

Reassigned Medicare billing, California enrollment
20,078 clinicians in this Medicare group

NPI 1639252604 (650) 299-2000

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 94538 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

$153.83 typical visit price

range $69.00 – $202.35

Typical copayment $38.45 (range $17.25 – $50.58)

Most-billed visit code 99204

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 20

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

MELINDA JENNY STEELE MD

Family Medicine

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 248-3000

HEUMIN LI R.PH.

Pharmacist

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 248-7577

SRILATA RAMAN M.D.

Internal Medicine

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 248-3623

MS. BARBARA TEDESCO ZEPEDA WHCNP

Registered Nurse (Women's Health Care, Ambulatory)

39400 PASEO PADRE PKWY, EMBARCADERO OB/GYN
FREMONT, CA 94538

Alameda County (510) 248-3591

CALVIN B. WHEELER MD

Psychiatry & Neurology (Neurology with Special Qualifications in Child Neurology)

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 795-3000

HANNELORE MOHR MD

Internal Medicine

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 795-3000

FREDERICK G. HOM MD

Internal Medicine

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 795-3000

MANJU JACOB

Dietitian, Registered

39400 PASEO PADRE PKWY
FREMONT, CA 94538

Alameda County (510) 739-6412

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 Marron Wong's NPI number?

The NPI number for Marron Wong is 1871859843. It was assigned to this individual provider in the NPPES registry on April 4, 2012.

Where is Marron Wong located?

Marron Wong practices at 39400 Paseo Padre Pkwy, Fremont, CA 94538. The listed phone number is (510) 248-3000.

What is Marron Wong's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Marron Wong enrolled in Medicare?

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

Which organization bills Medicare for Marron Wong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Marron Wong reassigns Medicare benefits to Permanente Medical Group Inc (Redwood City, 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 Marron 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 Marron Wong was last updated on December 17, 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.