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LEO MASCARENHAS MD
NPI 1417057225
Pediatrics - Pediatric Hematology-Oncology in Los Angeles, CA

Active since September 22, 2006PECOS EnrolledAccepts Medicare Assignment
127 S SAN VICENTE BLVD FL 7, LOS ANGELES, CA 90048(310) 423-4423(310) 423-4131 Get Directions Write a Review

NPPES record last updated: July 23, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Leo Mascarenhas Md NPPES

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

LEO MASCARENHAS MD (NPI 1417057225) is an individual pediatric hematology-oncology provider in Los Angeles, California, licensed in California (A54324) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of Other (1990).

NPPES Registry Identity

NPI1417057225
Entity TypeIndividualMale
Primary Taxonomy2080P0207X
Provider Legal NameLEO MASCARENHASCredential: MD
Location Address127 S SAN VICENTE BLVD FL 7Los Angeles, CA 90048-3311
Mailing Address4140 W 190th StTorrance, CA 90504-5513 · (310) 423-4423 · Fax (310) 423-4131
Phone(310) 423-4423
Fax(310) 423-4131
Sole ProprietorNo
Medical School CMSOtherGraduated 1990
Enumeration DateSeptember 22, 2006
Last NPPES UpdateJuly 23, 2025
NPPES CertifiedJuly 23, 2025
✔ NPI 1417057225 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPediatrics · Pediatric Hematology-OncologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0207X
License✔ Licensed in CA · A54324
Definition
A pediatrician trained in the combination of pediatrics, hematology and oncology to recognize and manage pediatric blood disorders and cancerous diseases.
127 S SAN VICENTE BLVD FL 7, Los Angeles, CA 90048
Open in Google Maps ↗

Secondary Practice Locations 3

Location 14650 W Sunset BlvdLos Angeles, CA 90027-6062 · Phone (323) 669-2121 · Fax (323) 600-7128
Location 28700 Beverly BlvdWest Hollywood, CA 90048-1804 · Phone (310) 423-4423 · Fax (310) 423-4131
Location 3100 W California BlvdPasadena, CA 91105-3010 · Phone (626) 397-5000

Other Identifiers 2

Other00A543240 G15CA · Cal Optima
Medicaid00A54324ACA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Leo Mascarenhas Md 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 ID6608904396
PECOS Enrollment IDI20100518000251
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.

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.

JASON EARL CHAN M.D. PH.D.
Internal Medicine (Hematology & Oncology)
127 S SAN VICENTE BLVD FL 7
LOS ANGELES, CA 90048
Los Angeles County (310) 423-8530
DR. NATSAI CHARLENE NYAKUDARIKA M.D.
Obstetrics & Gynecology (Gynecologic Oncology)
127 S SAN VICENTE BLVD FL 7
LOS ANGELES, CA 90048
Los Angeles County (310) 423-5800
DR. NICHOLAS N NISSEN M.D.
Surgery (Surgical Critical Care)
127 S SAN VICENTE BLVD FL 7
LOS ANGELES, CA 90048
Los Angeles County (310) 423-6746
MR. ALESSIO PIGAZZI M.D.
Colon & Rectal Surgery
127 S SAN VICENTE BLVD FL 7
LOS ANGELES, CA 90048
Los Angeles County (310) 423-5874
MARC ATTIYEH
Surgery (Surgical Oncology)
127 S SAN VICENTE BLVD FL 7
LOS ANGELES, CA 90048
Los Angeles County (310) 423-6746
LAWRENCE WAYNE LIU MD
Internal Medicine (Medical Oncology)
127 S SAN VICENTE BLVD FL 7
LOS ANGELES, CA 90048
Los Angeles County (310) 423-1160
HITOMI HOSOYA MD
Internal Medicine (Hematology)
127 S SAN VICENTE BLVD FL 7
LOS ANGELES, CA 90048
Los Angeles County (310) 423-1160
VICTORIA RENAE CERDA MD, MPH
Obstetrics & Gynecology
127 S SAN VICENTE BLVD FL 7
LOS ANGELES, CA 90048
Los Angeles County (310) 423-5800

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 Leo Mascarenhas's NPI number?

The NPI number for Leo Mascarenhas is 1417057225. It was assigned to this individual provider in the NPPES registry on September 22, 2006.

Where is Leo Mascarenhas located?

Leo Mascarenhas practices at 127 S San Vicente Blvd Fl 7, Los Angeles, CA 90048. The listed phone number is (310) 423-4423.

What is Leo Mascarenhas's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Hematology-Oncology, with taxonomy code 2080P0207X.

Is Leo Mascarenhas enrolled in Medicare?

Yes. Leo Mascarenhas 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.

When was this NPI record last updated?

The NPPES record for Leo Mascarenhas was last updated on July 23, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 months 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.