Leo Mascarenhas, MD

Primary specialty

Pediatric Hematology & Oncology PhysicianTaxonomy code 2080P0207X

License

A54324 Issued in CA

Practice address

127 S San Vicente Blvd FL 7
Los Angeles, CA 90048-3311

Phone

(310) 423-4423

Fax

(310) 423-4131

NPI assigned

Sep 22, 2006

Last updated

Jul 23, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Other identifiers 2

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Hematology/OncologyAlso: Pediatric Medicine

Education

Other, 1990

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Cedars-Sinai Medical CenterGroup PAC ID 0446169114, 788 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Cedars-Sinai Medical Center Hospital, Los Angeles, CA, CCN 050625

Merit-based Incentive Payment System (MIPS)

Final score

93.23 of 100Reported as group

Quality

77.83

Promoting interoperability

98

Improvement activities

40

Cost

71.17

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: lmascarenhas448168@direct.cshs.org

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Cedars-Sinai Medical Center

  • General Acute Care Hospital
  • Los Angeles, CA
  • NPI 1639172372
  Medicare reassignment Care Compare group NPD
• Cedars-Sinai Medical Care Foundation

  • Specialist
  • Los Angeles, CA
  • NPI 1316984388
  Medicare reassignment NPD
• Children's Hospital Los Angeles Medical Group, Inc.

  • Multi-Specialty Clinic/Center
  • Los Angeles, CA
  • NPI 1265530653
  Medicare reassignment NPD
• Southern California Permanente Medical Group

  • Health Maintenance Organization
  • Baldwin Park, CA
  • NPI 1770515280
  Medicare reassignment NPD
• Cedars-Sinai Medical Center

  dba San Vicente Pharmacy

  • Pharmacy
  • Los Angeles, CA
  • NPI 1376514810
  NPD
• Southern California Permanente Medical Group

  • Health Maintenance Organization
  • Santa Clarita, CA
  • NPI 1316409410
  NPD
• Southern California Permanente Medical Group

  • Health Maintenance Organization
  • Anaheim, CA
  • NPI 1952333460
  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Cedars-Sinai Medical Center

  • General Acute Care Hospital
  • Los Angeles, CA
  • NPI 1639172372
  Care Compare affiliation
• Cedars-Sinai Medical Center

  • General Acute Care Hospital
  • West Hollywood, CA
  • NPI 1891940326
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1158883200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753228800000",
    "number": "1417057225",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4140 W 190TH ST",
            "city": "TORRANCE",
            "state": "CA",
            "postal_code": "905045513",
            "telephone_number": "310-423-4423",
            "fax_number": "310-423-4131"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "127 S SAN VICENTE BLVD FL 7",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900483311",
            "telephone_number": "310-423-4423",
            "fax_number": "310-423-4131"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "4650 W Sunset Blvd",
            "address_purpose": "LOCATION",
            "city": "Los Angeles",
            "state": "CA",
            "postal_code": "900276062",
            "country_code": "US",
            "telephone_number": "323-669-2121",
            "fax_number": "323-600-7128",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "8700 Beverly Blvd",
            "address_purpose": "LOCATION",
            "city": "West Hollywood",
            "state": "CA",
            "postal_code": "900481804",
            "country_code": "US",
            "telephone_number": "310-423-4423",
            "fax_number": "310-423-4131",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "100 W California Blvd",
            "address_purpose": "LOCATION",
            "city": "Pasadena",
            "state": "CA",
            "postal_code": "911053010",
            "country_code": "US",
            "telephone_number": "626-397-5000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MASCARENHAS",
        "first_name": "LEO",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-09-22",
        "last_updated": "2025-07-23",
        "certification_date": "2025-07-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2080P0207X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Hematology-Oncology",
            "state": "CA",
            "license": "A54324",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CAL OPTIMA",
            "identifier": "00A543240 G15",
            "state": "CA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A54324A",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Lynn J Masada
• Rinat Masamed, MD
• Alisa Hatsuye Masamitsu
• Hiram Owen Brian Masayon, PT
• Keisha N Mascal, PSYD
• Nicholas Lee Mascarenhas, MD
• Dale Roger Mascari, D.P,M.
• Anita Mascarinia
• Tatyana Mascaro, NP
• Laurene Mascola, MD

• Pediatric Hematology & Oncology Physician in Los Angeles, CA
• Providers in Los Angeles, CA by specialty
• Pediatric Hematology & Oncology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 23, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.