1. Home
  2. Directory
  3. California
  4. San Ramon
  5. Obstetrics Gynecology
  6. NPI Profile

MARIA C QUAN MD
NPI 1043281405
Obstetrics & Gynecology in San Ramon, CA

Active since February 01, 2006PECOS EnrolledAccepts Medicare Assignment
11030 BOLLINGER CANYON RD STE 200, SAN RAMON, CA 94582(925) 263-5583 Get Directions Write a Review

NPPES record last updated: May 18, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: May 18, 2026, Jun 13, 2025, Jul 1, 2024 and 1 more (4 updates tracked since 2022).

About Maria C Quan Md NPPES

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

MARIA C QUAN MD (NPI 1043281405) is an individual obstetrics & gynecology provider in San Ramon, California, licensed in California (C143703) and active in the NPI registry since February 2006. She is enrolled in Medicare PECOS and is a graduate of Other (1989).

NPPES Registry Identity

NPI1043281405
Entity TypeIndividualFemale
Primary Taxonomy207V00000X
Provider Legal NameMARIA C QUANCredential: MD
Location Address11030 BOLLINGER CANYON RD STE 200San Ramon, CA 94582-4826
Mailing Address11030 Bollinger Canyon Rd Ste 200San Ramon, CA 94582-4826 · (925) 263-5583 · Fax (760) 414-3892
Phone(925) 263-5583
Sole ProprietorNo
Medical School CMSOtherGraduated 1989
Enumeration DateFebruary 1, 2006
Last NPPES UpdateMay 18, 20264 updates tracked since enumeration
NPPES CertifiedMay 18, 2026
✔ NPI 1043281405 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
Licenses✔ Licensed in CA · C143703✔ Licensed in WA · MD00037841
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.
11030 BOLLINGER CANYON RD STE 200, San Ramon, CA 94582
Open in Google Maps ↗

Other Identifiers 1

Medicaid8245193WA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Maria C Quan Md 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 ID4981595394
PECOS Enrollment IDI20220131000894
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94582 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

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

VALERIE PETERS
Nurse Practitioner (Family)
11030 BOLLINGER CANYON RD STE 200
SAN RAMON, CA 94582
Contra Costa County (925) 362-1001

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 Maria Quan's NPI number?

The NPI number for Maria Quan is 1043281405. It was assigned to this individual provider in the NPPES registry on February 1, 2006.

Where is Maria Quan located?

Maria Quan practices at 11030 Bollinger Canyon Rd Ste 200, San Ramon, CA 94582. The listed phone number is (925) 263-5583.

What is Maria Quan's specialty?

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

Is Maria Quan enrolled in Medicare?

Yes. Maria Quan 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.

When was this NPI record last updated?

The NPPES record for Maria Quan was last updated on May 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.