1. Home
  2. Directory
  3. California
  4. Oceanside
  5. Family Medicine
  6. NPI Profile

DR. GREGORY SHINGYANG ZHANG MD
NPI 1295360006
Family Medicine in Oceanside, CA

Active since March 12, 2020PECOS Enrolled
200 MERCY CIRCLE, OCEANSIDE, CA 92055(760) 725-4357 Get Directions Write a Review

NPPES record last updated: July 16, 2025. Verified against the NPPES registry weekly; last sync: August 30, 2026.

Record update history: Jul 14, 2021, Nov 18, 2020, Nov 5, 2020 and 1 more (4 updates tracked since 2020).

About Dr. Gregory Shingyang Zhang Md NPPES

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

DR. GREGORY SHINGYANG ZHANG MD (NPI 1295360006) is an individual family medicine provider in Oceanside, California, licensed in California (A187859) and active in the NPI registry since March 2020. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1295360006
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. GREGORY SHINGYANG ZHANGCredential: MD
Location Address200 MERCY CIRCLEOceanside, CA 92055
Mailing AddressNaval Hospital Camp Pendleton, Box 555191 Mercy CircleCamp Pendleton, CA 92055-5191 · (760) 725-4357
Phone(760) 725-4357
Sole ProprietorNo
Enumeration DateMarch 12, 2020
Last NPPES UpdateJuly 16, 20254 updates tracked since enumeration
NPPES CertifiedJuly 16, 2025
✔ NPI 1295360006 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
Licenses✔ Licensed in CA · A187859✔ Licensed in CO · DR.0066971
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.
200 MERCY CIRCLE, Oceanside, CA 92055
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Gregory Shingyang Zhang Md 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92055 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
$94.87 typical visit price
range $62.10 – $184.71
Typical copayment $23.71 (range $15.52 – $46.17)
Most-billed visit code 99203
Established Patient
$108.42 typical visit price
range $20.62 – $151.42
Typical copayment $27.10 (range $5.15 – $37.85)
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.

MARIA J HERRERA PH.D.
Psychologist (Clinical)
200 MERCY CIRCLE
OCEANSIDE, CA 92055
San Diego County (510) 542-0859
SHERRI MARTINEZ LMFT, ADCII
Counselor (Addiction (Substance Use Disorder))
200 MERCY CIRCLE
CAMP PENDLETON, CA 92055
San Diego County (760) 725-0063
DR. ASHLEY BITTLE LCSW, PSY.D.
Psychologist (Clinical)
200 MERCY CIRCLE
CAMP PENDLETON, CA 92055
San Diego County (760) 719-3322
CAROLYN STEINLAGE DPT
Physical Therapist
200 MERCY CIRCLE
CAMP PENDLETON, CA 92055
San Diego County (760) 719-3791
SHANE MCGUIRE FMF RECON IDC
Military Health Care Provider (Independent Duty Corpsman)
200 MERCY CIRCLE
OCEANSIDE, CA 92055
San Diego County (760) 725-8912
MELINDA WEE FAH MARTINEZ PA
Physician Assistant
200 MERCY CIRCLE
CAMP PENDLETON, CA 92055
San Diego County (760) 719-4550
ALEXANDER JEFFREY NELSON PA-C
Physician Assistant
200 MERCY CIRCLE
OCEANSIDE, CA 92055
San Diego County (760) 725-1288
ELLA HAHN SCHULTZ DO
Student in an Organized Health Care Education/Training Program
200 MERCY CIRCLE
CAMP PENDLETON, CA 92055
San Diego County (760) 725-1288

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 Gregory Zhang's NPI number?

The NPI number for Gregory Zhang is 1295360006. It was assigned to this individual provider in the NPPES registry on March 12, 2020.

Where is Gregory Zhang located?

Gregory Zhang practices at 200 Mercy Circle, Oceanside, CA 92055. The listed phone number is (760) 725-4357.

What is Gregory Zhang's specialty?

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

Is Gregory Zhang enrolled in Medicare?

Yes. Gregory Zhang is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Gregory Zhang was last updated on July 16, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 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.