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MR. JAMES M TSAI MD
NPI 1356329494
Obstetrics & Gynecology in Bakersfield, CA

Active since January 09, 2006PECOS Enrolled
100 OLD RIVER RD, BAKERSFIELD, CA 93311(661) 663-4800(661) 663-4871 Get Directions Write a Review

NPPES record last updated: July 21, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 21, 2022, Mar 17, 2018 (2 updates tracked since 2018).

About Mr. James M Tsai Md NPPES

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

MR. JAMES M TSAI MD (NPI 1356329494) is an individual obstetrics & gynecology provider in Bakersfield, California, licensed in California (A80854) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Bakersfield.

NPPES Registry Identity

NPI1356329494
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameMR. JAMES M TSAICredential: MD
Location Address100 OLD RIVER RDBakersfield, CA 93311-8823
Mailing Address100 Old River RoadBakersfield, CA 93311 · (661) 663-4800 · Fax (661) 663-4871
Phone(661) 663-4800
Fax(661) 663-4871
Sole ProprietorNo
Enumeration DateJanuary 9, 2006
Last NPPES UpdateJuly 21, 20222 updates tracked since enumeration
✔ NPI 1356329494 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in CA · A80854
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.
100 OLD RIVER RD, Bakersfield, CA 93311
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Secondary Practice Location 1

Location 1300 Old River Road, Suite 200Bakersfield, CA 93311 · Phone (661) 663-4800 · Fax (661) 663-4871

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mr. James M Tsai 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.

Medicare Billing Reassignment

Medicare enrollment records show James Tsai reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Obhg California, P.C.
2,070 mi
Obstetrics & Gynecology
777 LOWNDES HILL RD BLDG 1
Greenville, SC 29607
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Obhg California PC
  • 711 clinicians in this Medicare group
NPI 1215258892 (800) 967-2289

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 93311 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
$135.05 typical visit price
range $59.26 – $178.09
Typical copayment $33.76 (range $14.81 – $44.52)
Most-billed visit code 99204
Established Patient
$73.67 typical visit price
range $19.34 – $145.64
Typical copayment $18.41 (range $4.83 – $36.41)
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 16

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

MRS. JACQUELINE AVA WILLIAMS-OLANGO MD
Obstetrics & Gynecology
100 OLD RIVER RD
BAKERSFIELD, CA 93311
Kern County (661) 663-4800
MRS. WENDY C CRENSHAW MD
Obstetrics & Gynecology
100 OLD RIVER RD
BAKERSFIELD, CA 93311
Kern County (661) 663-4800
MR. NOEL G DEL MUNDO M.D.
Obstetrics & Gynecology
100 OLD RIVER RD
BAKERSFIELD, CA 93311
Kern County (661) 663-4800
JENNIFER M VELASCO NP-C
Nurse Practitioner (Family)
100 OLD RIVER RD
BAKERSFIELD, CA 93311
Kern County (661) 663-4800
RHONDA LOU COLVIN PA-C
Multi-Specialty
100 OLD RIVER RD
BAKERSFIELD, CA 93311
Kern County (661) 663-4966
MRS. MARIETTA MARZAN-TAN MD
Obstetrics & Gynecology
100 OLD RIVER RD
BAKERSFIELD, CA 93311
Kern County (661) 663-4800
MRS. JIGISHA D UPADHYAYA MD
Obstetrics & Gynecology
100 OLD RIVER RD
BAKERSFIELD, CA 93311
Kern County (661) 663-4800
DR. SAUHANG BALDEV PATEL M.D.
Obstetrics & Gynecology
100 OLD RIVER RD
BAKERSFIELD, CA 93311
Kern County (661) 663-4800

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 Tsai's NPI number?

The NPI number for James Tsai is 1356329494. It was assigned to this individual provider in the NPPES registry on January 9, 2006.

Where is James Tsai located?

James Tsai practices at 100 Old River Rd, Bakersfield, CA 93311. The listed phone number is (661) 663-4800.

What is James Tsai's specialty?

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

Is James Tsai enrolled in Medicare?

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

Which organization bills Medicare for James Tsai's services?

According to the CMS Revalidation Reassignment List (October 2026 release), James Tsai reassigns Medicare benefits to Obhg California, P.C. (Greenville, SC). 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 Tsai'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 Tsai was last updated on July 21, 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.