Igor Mashchenko, MD

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

A184456 Issued in CA

Practice address

100 W California Blvd
Pasadena, CA 91105-3010

Phone

(855) 522-7898

NPI assigned

Mar 28, 2018

Last updated

Aug 28, 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

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

Emergency Medicine

Education

Other, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

HMH Emergency Medical Group, Inc.Group PAC ID 7911800826, 56 clinicians

Exer Medical CorporationGroup PAC ID 9032359534, 336 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Huntington Hospital Hospital, Pasadena, CA, CCN 050438
• California Hospital Medical Center la Hospital, Los Angeles, CA, CCN 050149

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

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.

• HMH Emergency Medical Group, Inc.

  • Emergency Medicine Physician
  • Pasadena, CA
  • NPI 1659383024
  Medicare reassignment Care Compare group NPD
• Exer Medical Corporation

  dba Exer Urgent Care

  • Urgent Care Clinic/Center
  • Calabasas, CA
  • NPI 1588901532
  Medicare reassignment Care Compare group
• Golden State Emergency Physicians Inc

  • Emergency Medicine Physician
  • Los Angeles, CA
  • NPI 1770886558
  Medicare reassignment NPD
• Team Physicians of Northern California Medical Group Inc

  • Emergency Medicine Physician
  • Pleasanton, CA
  • NPI 1649692716
  Medicare reassignment NPD
• Team Physicians of Southern California Medical Group, Inc.

  • Emergency Medicine Physician
  • Oceanside, CA
  • NPI 1225499015
  Medicare reassignment
• Huntington Memorial Hospital

  dba Huntington Memorial Hospital Pharmacy

  • General Acute Care Hospital
  • Pasadena, CA
  • NPI 1467672667
  NPD (past)

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

• Dignity Community Care

  dba California Hospital Medical Center - Los Angeles

  • General Acute Care Hospital
  • Los Angeles, CA
  • NPI 1114081056
  Care Compare affiliation
• Pasadena Hospital Association, LTD

  dba Huntington Hospital

  • General Acute Care Hospital
  • Pasadena, CA
  • NPI 1407828429
  Care Compare affiliation

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

{
    "created_epoch": "1522195200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1756339200000",
    "number": "1699270884",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 60259",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900600259",
            "telephone_number": "877-346-2211"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 W CALIFORNIA BLVD",
            "city": "PASADENA",
            "state": "CA",
            "postal_code": "911053010",
            "telephone_number": "855-522-7898"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MASHCHENKO",
        "first_name": "IGOR",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2018-03-28",
        "last_updated": "2025-08-28",
        "certification_date": "2025-08-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CA",
            "license": "A184456",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jeanne Therese Masangcay
• Idida Mascarenas, MA LMFT
• Daisy Mascorro
• Jacqueline Joy Masehi-Lano
• Stephanie Masek, MS CCC-SLP
• David Masini
• Carol Antoinette Maskin, MFT
• Johnathan David Maskin, M.D.
• Alberta Mason, MHW-4
• Laron Mason

• Emergency Medicine Physician in Pasadena, CA
• Providers in Pasadena, CA by specialty
• Emergency Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 28, 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.