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MS. KAREN CHANG MD
NPI 1518924398
Pathology - Anatomic Pathology & Clinical Pathology in Duarte, CA

Active since April 27, 2006PECOS Enrolled
1500 DUARTE RD, DUARTE, CA 91010(626) 359-8111 Get Directions Write a Review

NPPES record last updated: November 23, 2021. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Ms. Karen Chang Md NPPES

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

MS. KAREN CHANG MD (NPI 1518924398) is an individual anatomic pathology & clinical pathology provider in Duarte, California, licensed in California (G59593) and active in the NPI registry since April 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1518924398
Entity TypeIndividualFemale
Primary Taxonomy207ZP0102X
Provider Legal NameMS. KAREN CHANGCredential: MD
Location Address1500 DUARTE RDDuarte, CA 91010-3012
Mailing AddressPo Box 5059Monrovia, CA 91017 · (626) 775-3200 · Fax (626) 775-3271
Phone(626) 359-8111
Sole ProprietorNo
Enumeration DateApril 27, 2006
Last NPPES UpdateNovember 23, 2021
NPPES CertifiedNovember 23, 2021
✔ NPI 1518924398 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPathology · Anatomic Pathology & Clinical PathologyAllopathic & Osteopathic Physicians
Taxonomy Code207ZP0102X
License✔ Licensed in CA · G59593
Definition
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
1500 DUARTE RD, Duarte, CA 91010
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Other Identifiers 1

Medicaid00G595930CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Ms. Karen Chang 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 Reassignments

2

Medicare enrollment records show Karen Chang reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Southern California Permanente Medical Group
15 mi
Clinical Medical Laboratory
13000 PEYTON DR
Chino Hills, CA 91709
  • Reassigned Medicare billing, California enrollment
  • 5,228 clinicians in this Medicare group
NPI 1396287082 (888) 750-0036
Metroplex Pathology Associates
1,210 mi
Anatomic Pathology & Clinical Pathology
1111 S FREEPORT PKWY
Coppell, TX 75019
  • Reassigned Medicare billing, Arizona enrollment
  • 6 clinicians in this Medicare group
NPI 1942223029 (800) 979-8292

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 91010 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
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.

SASAN FAZELI M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
1500 DUARTE RD
DUARTE, CA 91010
Los Angeles County (626) 256-4673
SKAI MINDY FU PHARMD
Pharmacist
1500 DUARTE RD
DUARTE, CA 91010
Los Angeles County (626) 500-5461
JIMMIE WONG MD
Radiology (Diagnostic Radiology)
1500 DUARTE RD
DUARTE, CA 91010
Los Angeles County (626) 359-8111
TERENCE WILLIAMS M.D.
Radiology (Radiation Oncology)
1500 DUARTE RD
DUARTE, CA 91010
Los Angeles County (626) 256-4673
DR. MUSTAFA RAOOF M.D.
Surgery (Surgical Oncology)
1500 DUARTE RD
DUARTE, CA 91010
Los Angeles County (626) 256-4673
DR. EDNA CLOGG SHENVI M.D.
Surgery
1500 DUARTE RD
DUARTE, CA 91010
Los Angeles County (626) 256-4673
ALAN CHEN TANG M.D.
Anesthesiology
1500 DUARTE RD
DUARTE, CA 91010
Los Angeles County (626) 359-8111
WINSTON YUHSIEN LEE MD, PHD
Pathology (Hematology)
1500 DUARTE RD
DUARTE, CA 91010
Los Angeles County (626) 256-4673

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 Karen Chang's NPI number?

The NPI number for Karen Chang is 1518924398. It was assigned to this individual provider in the NPPES registry on April 27, 2006.

Where is Karen Chang located?

Karen Chang practices at 1500 Duarte Rd, Duarte, CA 91010. The listed phone number is (626) 359-8111.

What is Karen Chang's specialty?

The primary specialty registered for this NPI is Pathology, specializing in Anatomic Pathology & Clinical Pathology, with taxonomy code 207ZP0102X.

Is Karen Chang enrolled in Medicare?

Yes. Karen Chang is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Karen Chang's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karen Chang reassigns Medicare benefits to 2 organizations: Southern California Permanente Medical Group (Chino Hills, CA) and Metroplex Pathology Associates (Coppell, TX). Each 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 Karen 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 Karen Chang was last updated on November 23, 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.