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THERESA T CHANG M.D.
NPI 1205134111
Family Medicine in Merced, CA

Active since March 02, 2011PECOS EnrolledAccepts Medicare Assignment
315 MERCY AVE STE 301, MERCED, CA 95340(209) 564-3500 Get Directions Write a Review

NPPES record last updated: December 15, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Theresa T Chang M.d. NPPES

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

THERESA T CHANG M.D. (NPI 1205134111) is an individual family medicine provider in Merced, California, licensed in California (A115882) and active in the NPI registry since March 2011. She is enrolled in Medicare PECOS and is a graduate of Other (2002).

NPPES Registry Identity

NPI1205134111
Entity TypeIndividualFemale
Primary Taxonomy207Q00000X
Provider Legal NameTHERESA T CHANGCredential: M.D.
Location Address315 MERCY AVE STE 301Merced, CA 95340-8367
Mailing Address2430 E Soquel CirFresno, CA 93720-4638
Phone(209) 564-3500
Sole ProprietorNo
Medical School CMSOtherGraduated 2002
Enumeration DateMarch 2, 2011
Last NPPES UpdateDecember 15, 2021
✔ NPI 1205134111 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License✔ Licensed in CA · A115882
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.
315 MERCY AVE STE 301, Merced, CA 95340
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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

Theresa T Chang 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 ID3678728474
PECOS Enrollment IDI20130228000163
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 Theresa Chang reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
65 mi
Internal Medicine
7373 WEST LANE
Stockton, CA 95210
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1548343510 (209) 476-2000

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 95340 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
$90.32 typical visit price
range $58.87 – $176.60
Typical copayment $22.58 (range $14.71 – $44.15)
Most-billed visit code 99203
Established Patient
$103.36 typical visit price
range $19.28 – $144.60
Typical copayment $25.84 (range $4.82 – $36.15)
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 18

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

DR. GEOFFREY BECK M.D.
Student in an Organized Health Care Education/Training Program
315 MERCY AVE STE 301
MERCED, CA 95340
Merced County (209) 564-3513
SANDRO CEROME
Student in an Organized Health Care Education/Training Program
315 MERCY AVE STE 301
MERCED, CA 95340
Merced County (209) 564-3513
SYEDA ZIL E ZEHRA NAQVI MD
Student in an Organized Health Care Education/Training Program
315 MERCY AVE STE 301
MERCED, CA 95340
Merced County (209) 564-5300
GRACE MARANIA MD
Family Medicine
315 MERCY AVE STE 301
MERCED, CA 95340
Merced County (209) 564-3500
DR. ROHAN SUNIL KULKARNI MD
Student in an Organized Health Care Education/Training Program
315 MERCY AVE STE 301
MERCED, CA 95340
Merced County (209) 564-3513
JUDY KIKHIA MD
Student in an Organized Health Care Education/Training Program
315 MERCY AVE STE 301
MERCED, CA 95340
Merced County (209) 564-3513
HATICE SEYMA ERDEM
Student in an Organized Health Care Education/Training Program
315 MERCY AVE STE 301
MERCED, CA 95340
Merced County (209) 564-3513
KAMINDARA DHILLON MD
Family Medicine
315 MERCY AVE STE 301
MERCED, CA 95340
Merced County (209) 564-3513

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 Theresa Chang's NPI number?

The NPI number for Theresa Chang is 1205134111. It was assigned to this individual provider in the NPPES registry on March 2, 2011.

Where is Theresa Chang located?

Theresa Chang practices at 315 Mercy Ave Ste 301, Merced, CA 95340. The listed phone number is (209) 564-3500.

What is Theresa Chang's specialty?

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

Is Theresa Chang enrolled in Medicare?

Yes. Theresa Chang 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.

Which organization bills Medicare for Theresa Chang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Theresa Chang reassigns Medicare benefits to Permanente Medical Group Inc (Stockton, 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 Theresa Chang'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 Theresa Chang was last updated on December 15, 2021. 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.