Mark Jan Szumilewicz, M.D.

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

J5032 Issued in TX

Practice address

5501 S Expressway 77
Harlingen, TX 78550-3213

Phone

(956) 423-3643

NPI assigned

May 4, 2006

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 TX

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

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 and National Provider Directory roles.

• Rio Grande Valley Emergency Physicians PLLC

  • Emergency Medicine Physician
  • Weslaco, TX
  • NPI 1801877212
  Medicare reassignment NPD
• Southwest General Emergency Physicians, PLLC

  • Emergency Medicine Physician
  • San Antonio, TX
  • NPI 1174560437
  NPD
• Harlingen Emergency Medical Associates, PA

  • Emergency Medicine Physician
  • Harlingen, TX
  • NPI 1821073008
  NPD (past)

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

{
    "created_epoch": "1146700800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1760430631",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "200 CORPORATE BLVD",
            "address_2": "SUITE 201",
            "city": "LAFAYETTE",
            "state": "LA",
            "postal_code": "705083870",
            "telephone_number": "800-893-9698"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "5501 S EXPRESSWAY 77",
            "city": "HARLINGEN",
            "state": "TX",
            "postal_code": "785503213",
            "telephone_number": "956-423-3643"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SZUMILEWICZ",
        "first_name": "MARK",
        "middle_name": "JAN",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-05-04",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "TX",
            "license": "J5032",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Shawnita Tamayo
• Miguel Armando Tamez, MPAS, PA-C
• Bernardette Tan, RN
• Raissa Elaine Tanqueco
• Rosseller B Tapangan, M.D.

• Emergency Medicine Physician in Harlingen, TX
• Providers in Harlingen, TX by specialty
• Emergency Medicine Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.