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JAMES CHUNG SHIEH M.D
NPI 1639198930
Emergency Medicine in Antioch, CA

Active since July 18, 2006PECOS Enrolled
94.62/100
CMS Quality Rating
3901 LONE TREE WAY, ANTIOCH, CA 94509(925) 779-7273 Get Directions Write a Review

NPPES record last updated: November 9, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About James Chung Shieh M.d NPPES

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

JAMES CHUNG SHIEH M.D (NPI 1639198930) is an individual emergency medicine provider in Antioch, California, licensed in California (A40594) and active in the NPI registry since July 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1639198930
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameJAMES CHUNG SHIEHCredential: M.D
Location Address3901 LONE TREE WAYAntioch, CA 94509-6200
Mailing Address2100 Powell St, Ste 920Emeryville, CA 94608-1826 · (510) 350-2600 · Fax (510) 879-9100
Phone(925) 779-7273
Sole ProprietorNo
Enumeration DateJuly 18, 2006
Last NPPES UpdateNovember 9, 2007
✔ NPI 1639198930 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · A40594
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
3901 LONE TREE WAY, Antioch, CA 94509
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Other Identifiers 3

Medicare UPINA29156CA
Medicaid00A405940CA
Medicare PIN00A405940CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

James Chung Shieh 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 James Shieh reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Cep America - California
Same address
Emergency Medicine
3901 LONE TREE WAY
Antioch, CA 94509
  • Reassigned Medicare billing, California enrollment
  • 2,323 clinicians in this Medicare group
NPI 1912930421 (925) 779-7273

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 94509 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

94.62/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality76.67
Improvement Activities40
Cost97.14

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. DUNG THINGOC NGUYEN PHARM. D.
Pharmacist
3901 LONE TREE WAY
ANTIOCH, CA 94509
Contra Costa County (925) 779-7200
KATHLEEN A REGACHO MD
Emergency Medicine
3901 LONE TREE WAY
ANTIOCH, CA 94509
Contra Costa County (925) 779-3522
KHANH D NGUYEN M.D.
Emergency Medicine
3901 LONE TREE WAY
ANTIOCH, CA 94509
Contra Costa County (510) 350-2657
CATHERINE JANSON PROSSER N.P.
Registered Nurse
3901 LONE TREE WAY
ANTIOCH, CA 94509
Contra Costa County (925) 779-7200
MARY ANTIONETTE FITZSIMONS M.D
Emergency Medicine
3901 LONE TREE WAY
ANTIOCH, CA 94509
Contra Costa County (925) 779-7273
CATHERINE J. BELL MD
Anesthesiology
3901 LONE TREE WAY
ANTIOCH, CA 94509
Contra Costa County (925) 779-7200
DR. PATRICIA ANNE YABUT HARO M.D.
Hospitalist
3901 LONE TREE WAY
ANTIOCH, CA 94509
Contra Costa County (916) 854-6975
MARGARET HELEN BEAR PA-C
Physician Assistant (Medical)
3901 LONE TREE WAY
ANTIOCH, CA 94509
Contra Costa County (925) 779-7200

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 James Shieh's NPI number?

The NPI number for James Shieh is 1639198930. It was assigned to this individual provider in the NPPES registry on July 18, 2006.

Where is James Shieh located?

James Shieh practices at 3901 Lone Tree Way, Antioch, CA 94509. The listed phone number is (925) 779-7273.

What is James Shieh's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is James Shieh enrolled in Medicare?

Yes. James Shieh is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for James Shieh's services?

According to the CMS Revalidation Reassignment List (October 2026 release), James Shieh reassigns Medicare benefits to Cep America - California (Antioch, 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 James Shieh'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 James Shieh was last updated on November 9, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.