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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 T LY
NPI 1295362085
Internal Medicine - Hematology & Oncology in Downey, CA

Active since March 24, 2020PECOS Enrolled
11480 BROOKSHIRE AVE STE 300, DOWNEY, CA 90241(714) 456-5413 Get Directions Write a Review

NPPES record last updated: August 12, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Aug 12, 2026, May 15, 2020, Mar 24, 2020 (3 updates tracked since 2020).

About Catherine T Ly NPPES

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

CATHERINE T LY (NPI 1295362085) is an individual hematology & oncology provider in Downey, California, licensed in California (A185150) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1295362085
Entity TypeIndividualFemale
Primary Taxonomy207RH0003X
Provider Legal NameCATHERINE T LY
Location Address11480 BROOKSHIRE AVE STE 300Downey, CA 90241-5023
Mailing Address11480 Brookshire Ave Ste 300Downey, CA 90241-5023
Phone(714) 456-5413
Sole ProprietorNo
Enumeration DateMarch 24, 2020
Last NPPES UpdateAugust 12, 20263 updates tracked since enumeration
NPPES CertifiedAugust 12, 2026
✔ NPI 1295362085 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Hematology & OncologyAllopathic & Osteopathic Physicians
Taxonomy Code207RH0003X
License✔ Licensed in CA · A185150
Definition
An internist doctor of osteopathy that specializes in the treatment of the combination of hematology and oncology disorders. A doctor of osteopathy that is board eligible/certified by the American Osteopathic Board of Internal Medicine WAS able to obtain a Certificate of Special Qualifications in the field of Hematology and Oncology. The Certificate is NO longer offered.
11480 BROOKSHIRE AVE STE 300, Downey, CA 90241
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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 T Ly 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 90241 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
$187.60 typical visit price
range $62.96 – $187.60
Typical copayment $46.90 (range $15.74 – $46.90)
Most-billed visit code 99205
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 2

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

DR. MARLON MARAGAY MADUCDOC M.D.
Otolaryngology
11480 BROOKSHIRE AVE STE 300
DOWNEY, CA 90241
Los Angeles County (562) 826-8000
PIH HEALTH PHYSICIANS
Family Medicine
11480 BROOKSHIRE AVE STE 300
DOWNEY, CA 90241
Los Angeles County (562) 977-1690

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 Ly's NPI number?

The NPI number for Catherine Ly is 1295362085. It was assigned to this individual provider in the NPPES registry on March 24, 2020.

Where is Catherine Ly located?

Catherine Ly practices at 11480 Brookshire Ave Ste 300, Downey, CA 90241. The listed phone number is (714) 456-5413.

What is Catherine Ly's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.

Is Catherine Ly enrolled in Medicare?

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

When was this NPI record last updated?

The NPPES record for Catherine Ly was last updated on August 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.