CATHERINE NGUYEN M.D.
NPI 1043660087
Family Medicine in Walnut Creek, CA

Q: What is Catherine Nguyen's NPI number?

The NPI number for Catherine Nguyen is 1043660087. It was assigned to this individual provider in the NPPES registry on June 21, 2016.

Q: What is Catherine Nguyen's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for Catherine Nguyen was last updated on March 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.

Active since June 21, 2016PECOS EnrolledAccepts Medicare Assignment

2337 OAK GROVE RD, WALNUT CREEK, CA 94598(888) 663-6331(415) 252-7176 Get Directions Write a Review

NPPES record last updated: March 17, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 17, 2025, Oct 24, 2019, Jun 21, 2016 (3 updates tracked since 2016).

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About Catherine Nguyen M.d. NPPES

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

CATHERINE NGUYEN M.D. (NPI 1043660087) is an individual family medicine provider in Walnut Creek, California, licensed in California (A152492) and active in the NPI registry since June 2016. She is enrolled in Medicare PECOS and is a graduate of Tulane University School Of Medicine (2016).

NPPES Registry Identity

NPI1043660087

Entity TypeIndividualFemale

Primary Taxonomy207Q00000X

Provider Legal NameCATHERINE NGUYENCredential: M.D.

Location Address2337 OAK GROVE RDWalnut Creek, CA 94598-3506

Mailing Address1 Embarcadero Ctr Ste 1900San Francisco, CA 94111-3723 · (415) 658-6791

Phone(888) 663-6331

Fax(415) 252-7176

Sole ProprietorNo

Medical School CMSTulane University School Of MedicineGraduated 2016

Enumeration DateJune 21, 2016

Last NPPES UpdateMarch 17, 20253 updates tracked since enumeration

NPPES CertifiedMarch 17, 2025

✔ NPI 1043660087 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

License✔ Licensed in CA · A152492

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

2337 OAK GROVE RD, Walnut Creek, CA 94598

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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 and accepts Medicare assignment

Catherine Nguyen M.d. 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 ID345501722

PECOS Enrollment IDI20191014002084

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 Catherine Nguyen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

One Medical Group, Inc.

23 mi

Family Medicine

2 EMBARCADERO CTR LBBY LEVEL
San Francisco, CA 94111

Reassigned Medicare billing, California enrollment
291 clinicians in this Medicare group

NPI 1467781641 (415) 578-3100

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

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

79 services29 patients

Insertion of needle into vein for collection of blood sample 36415

This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.

32 services27 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94598 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

$104.51 typical visit price

range $69.00 – $202.35

Typical copayment $26.12 (range $17.25 – $50.58)

Most-billed visit code 99203

Established Patient

$119.48 typical visit price

range $23.44 – $166.46

Typical copayment $29.87 (range $5.86 – $41.61)

Most-billed visit code 99214

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 14

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

MADELYN GARCIA

Family Medicine