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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

CATHERINE CHIEN MD
NPI 1215928460
Internal Medicine - Infectious Disease in Los Angeles, CA

Active since November 04, 2005PECOS Enrolled
1414 S GRAND AVE, STE 400, LOS ANGELES, CA 90015(213) 741-9727(213) 741-0867 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Catherine Chien Md NPPES

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

CATHERINE CHIEN MD (NPI 1215928460) is an individual infectious disease provider in Los Angeles, California, licensed in California (A74698) and active in the NPI registry since November 2005. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1215928460
Entity TypeIndividualFemale
Primary Taxonomy207RI0200X
Provider Legal NameCATHERINE CHIENCredential: MD
Location Address1414 S GRAND AVE, STE 400Los Angeles, CA 90015-3067
Mailing Address1001 N Martel AveWest Hollywood, CA 90046-6611 · (323) 436-5019 · Fax (323) 436-5034
Phone(213) 741-9727
Fax(213) 741-0867
Sole ProprietorNo
Enumeration DateNovember 4, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1215928460 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RI0200X
License✔ Licensed in CA · A74698
Definition
An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.
1414 S GRAND AVE, Los Angeles, CA 90015
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Other Identifiers 1

Medicaid00A746980CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Catherine Chien 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 90015 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.

RAYMOND WALIANY M.D
Internal Medicine
1414 S GRAND AVE
LOS ANGELES, CA 90015
Los Angeles County (213) 743-9000
IMPERIAL HEALTH INC
Radiology (Radiation Oncology)
1414 S GRAND AVE, STE 101
LOS ANGELES, CA 90015
Los Angeles County (818) 484-3272
BIGGERS & HOLLY MD'S
Neurological Surgery
1414 S GRAND AVE, SUITE 410
LOS ANGELES, CA 90015
Los Angeles County (213) 745-5595
DR. SAMERA OWHADIAN DMD
Dentist
1414 S GRAND AVE, SUITE 485
LOS ANGELES, CA 90015
Los Angeles County (213) 744-1752
SUNGKYOUNG KANG PHARMD
Pharmacist
1414 S GRAND AVE
LOS ANGELES, CA 90015
Los Angeles County (909) 296-2007
SOUTHERN CALIFORNIA EYE CENTER
Optometrist (Corneal and Contact Management)
1414 S GRAND AVE, SUITE 105
LOS ANGELES, CA 90015
Los Angeles County (213) 749-5555
TERRY NGUYEN P.A.
Physician Assistant (Medical)
1414 S GRAND AVE, #456
LOS ANGELES, CA 90015
Los Angeles County (213) 745-6047
CALIFORNIA EYE CENTER
Optometrist (Corneal and Contact Management)
1414 S GRAND AVE, SUITE 100-C
LOS ANGELES, CA 90015
Los Angeles County (213) 749-5555

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 Catherine Chien's NPI number?

The NPI number for Catherine Chien is 1215928460. It was assigned to this individual provider in the NPPES registry on November 4, 2005.

Where is Catherine Chien located?

Catherine Chien practices at 1414 S Grand Ave Ste 400, Los Angeles, CA 90015. The listed phone number is (213) 741-9727.

What is Catherine Chien's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Catherine Chien enrolled in Medicare?

Yes. Catherine Chien is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Catherine Chien was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 41 days 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.