Marek Walczak, M.D.

Primary specialty

Hospitalist PhysicianTaxonomy code 208M00000X

License

N0537 Issued in TX

Practice address

2601 Dimmitt Rd
Plainview, TX 79072-1833

Phone

(806) 296-5531

NPI assigned

Jun 1, 2009

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

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

Specialty

Internal Medicine

Education

Other, 1988

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Hospitalist Medicine Physicians of Texas PLLCGroup PAC ID 3476688318, 685 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Covenant Hospital Plainview Hospital, Plainview, TX, CCN 450539

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations (25 of 28)

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.

• Hospitalist Medicine Physicians of Texas, PLLC

  • Internal Medicine Physician
  • Humble, TX
  • NPI 1629307095
  Medicare reassignment Care Compare group NPD
• Hni Medical Services

  • Hospitalist Physician
  • Austin, TX
  • NPI 1366735169

  Internal Medicine

  Medicare reassignment NPD
• Ipc Healthcare Services of Texas, PLLC

  • Hospitalist Physician
  • San Antonio, TX
  • NPI 1023403011

  Internal Medicine

  Medicare reassignment NPD
• Lonestar Hospital Medicine Associates, PA

  • Hospitalist Physician
  • Mansfield, TX
  • NPI 1518237429

  Internal Medicine

  Medicare reassignment NPD
• Sound Inpatient Physicians of Texas I, Inc

  • Family Medicine Physician
  • Sugar Land, TX
  • NPI 1831424563

  Internal Medicine

  Medicare reassignment NPD
• Pine Ridge Indian Health Service Hospital

  • General Acute Care Hospital
  • Pine Ridge, SD
  • NPI 1497786412

  TX

  Medicare reassignment NPD
• Cogent Healthcare of Texas, PA

  • Internal Medicine Physician
  • Dallas, TX
  • NPI 1992722953
  Medicare reassignment
• McAllen Hospitalist Group, PLLC

  • Internal Medicine Physician
  • Edinburg, TX
  • NPI 1356361976
  NPD
• Sound Inpatient Physicians of Texas I, Inc

  • Hospitalist Physician
  • San Antonio, TX
  • NPI 1811321797

  Internal Medicine

  NPD
• Pine Ridge Indian Health Service Hospital

  • Clinic/Center
  • Martin, SD
  • NPI 1003208257
  NPD
• Pine Ridge Indian Health Service Hospital

  • Clinic/Center
  • Wanblee, SD
  • NPI 1962559518
  NPD
• Sound Inpatient Physicians of Texas I, Inc

  • Hospitalist Physician
  • Tacoma, WA
  • NPI 1629403761

  Internal Medicine

  NPD

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

• Methodist Hospital Plainview Texas

  • General Acute Care Hospital
  • Plainview, TX
  • NPI 1073580726
  Care Compare affiliation
• Methodist Hospital Plainview Texas

  • Ambulatory Surgical Clinic/Center
  • Plainview, TX
  • NPI 1174630198

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1243814400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782864000000",
    "number": "1083840375",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1781 SPYGLASS DR",
            "address_2": "APT 246",
            "city": "AUSTIN",
            "state": "TX",
            "postal_code": "787466890",
            "telephone_number": "203-906-5389"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2601 DIMMITT RD",
            "city": "PLAINVIEW",
            "state": "TX",
            "postal_code": "790721833",
            "telephone_number": "806-296-5531"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WALCZAK",
        "first_name": "MAREK",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2009-06-01",
        "last_updated": "2026-07-01",
        "certification_date": "2026-07-01",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "TX",
            "license": "N0537",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "TX",
            "license": "N0537",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• United Supermarkets LLC
• Lydia Valdez, PT
• Kimberly D Villanueva, LPC
• Wal-Mart Stores Texas LLC
• Wal-Mart Stores Texas, LLC
• Warren Paul Walker, M.ED.LPC, LCDC, LBSW
• Linda Carol Walls, MSW
• Betty Lucille Warren, P.T. ASSISTANT
• Jon Robin Watkins, M.D.
• Waypoints Counseling, PLLC

• Hospitalist Physician in Plainview, TX
• Providers in Plainview, TX by specialty
• Hospitalist Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 1, 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.
• 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.