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DR. YI YI STEPHANIE GU M.D.
NPI 1932183472
Internal Medicine - Rheumatology in Oakland, CA

Active since November 29, 2005PECOS EnrolledAccepts Medicare Assignment
350 30TH ST, #320, OAKLAND, CA 94609(510) 465-6700(510) 465-7765 Get Directions Write a Review

NPPES record last updated: January 6, 2022. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Yi Yi Stephanie Gu M.d. NPPES

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

DR. YI YI STEPHANIE GU M.D. (NPI 1932183472) is an individual rheumatology provider in Oakland, California, licensed in California (A88414) and active in the NPI registry since November 2005. She is enrolled in Medicare PECOS and is a graduate of University Of California, Davis School Of Medicine (2003).

NPPES Registry Identity

NPI1932183472
Entity TypeIndividualFemale
Primary Taxonomy207RR0500X
Provider Legal NameDR. YI YI STEPHANIE GUCredential: M.D.
Location Address350 30TH ST, #320Oakland, CA 94609-3424
Mailing Address350 30th St, #320Oakland, CA 94609-3424 · (510) 465-6700 · Fax (510) 465-7765
Phone(510) 465-6700
Fax(510) 465-7765
Sole ProprietorNo
Medical School CMSUniversity Of California, Davis School Of MedicineGraduated 2003
Enumeration DateNovember 29, 2005
Last NPPES UpdateJanuary 6, 2022
✔ NPI 1932183472 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · RheumatologyAllopathic & Osteopathic Physicians
Taxonomy Code207RR0500X
License✔ Licensed in CA · A88414
Definition
An internist who treats diseases of joints, muscle, bones and tendons. This specialist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.
350 30TH ST, Oakland, CA 94609
Open in Google Maps ↗

Other Names 1

Professional Name (2)Dr. Stephanie Gu M.d.

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

Dr. Yi Yi Stephanie Gu 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 ID7719984756
PECOS Enrollment IDI20061103000322
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 94609 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
$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 20

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

DR. HUBERT K WONG M.D.
Ophthalmology
350 30TH ST, SUITE 444
OAKLAND, CA 94609
Alameda County (510) 832-8080
NICOLE MARIE KAIPUST M.D.
Hospitalist
350 30TH ST, SUITE 320
OAKLAND, CA 94609
Alameda County (510) 465-6700
RANDALL HEALTHCARE INC
Internal Medicine
350 30TH ST, #100
OAKLAND, CA 94609
Alameda County (510) 342-2239
PHILLIP LEON ROSS MD
Urology
350 30TH ST, STE 100
OAKLAND, CA 94609
Alameda County (510) 204-8290
ZULFIKARAL HABIB LALANI
Radiologic Technologist (Sonography)
350 30TH ST, SUITE 320
OAKLAND, CA 94609
Alameda County (510) 465-6700
LORI M BELTRAN D.O.
Family Medicine
350 30TH ST, SUITE 407
OAKLAND, CA 94609
Alameda County (510) 419-0230
MS. ANN MARIE DALEIDEN NP
Nurse Practitioner (Gerontology)
350 30TH ST, SUITE 407
OAKLAND, CA 94609
Alameda County (510) 419-0230
ANNA FRICK MD
Obstetrics & Gynecology (Urogynecology and Reconstructive Pelvic Surgery)
350 30TH ST, SUITE 100
OAKLAND, CA 94609
Alameda County (510) 204-1844

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 Yi Yi Gu's NPI number?

The NPI number for Yi Yi Gu is 1932183472. It was assigned to this individual provider in the NPPES registry on November 29, 2005. The provider is also known as Dr. Stephanie Gu M.D..

Where is Yi Yi Gu located?

Yi Yi Gu practices at 350 30th St #320, Oakland, CA 94609. The listed phone number is (510) 465-6700.

What is Yi Yi Gu's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Rheumatology, with taxonomy code 207RR0500X.

Is Yi Yi Gu enrolled in Medicare?

Yes. Yi Yi Gu 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 Yi Yi Gu was last updated on January 6, 2022. 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.