Luis Angel Reyes Mercado, M.D.

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

P4804 Issued in TX

Practice address

300 University Blvd
Round Rock, TX 78665-1032

Phone

(512) 509-0100

Fax

(512) 218-6330

NPI assigned

Jun 12, 2007

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Other names 1

• Dr. Luis Reyes Mercado Professional name

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in VI, TX2 enrollments

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 2

Specialty

Emergency Medicine

Education

University Central del Caribe Escuela de Medicina, 2005

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Comal Emergency Physicians PLLCGroup PAC ID 6901259936, 81 clinicians

Longhorn Emergency Medical Associates PAGroup PAC ID 4486971041, 149 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• St David'S South Austin Medical Center Hospital, Austin, TX, CCN 450713
• Christus Santa Rosa Hospital-San Marcos Hospital, San Marcos, TX, CCN 450272
• Baylor Scott & White Medical Center - Round Rock Hospital, Round Rock, TX, CCN 670034
• South Texas Health System Hospital, Edinburg, TX, CCN 450119

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: lreyesmercado531014@christushealth.direct-ci.net

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.

• Comal Emergency Physicians, PLLC

  • Emergency Medicine Physician
  • San Marcos, TX
  • NPI 1588438675
  Medicare reassignment Care Compare group NPD
• Longhorn Emergency Medical Associates PA

  • Emergency Medicine Physician
  • Austin, TX
  • NPI 1649669672
  Medicare reassignment Care Compare group NPD
• Emergency Medicine Services of TX, PLLC

  • Emergency Medicine Physician
  • San Antonio, TX
  • NPI 1245938729
  Medicare reassignment NPD
• Texas Emergency Medicine Group, LLP

  • Emergency Medicine Physician
  • Graham, TX
  • NPI 1134774722
  Medicare reassignment NPD
• Texas Medicine Resources, LLP

  • Emergency Medicine Physician
  • Fort Worth, TX
  • NPI 1376581900
  Medicare reassignment NPD
• Governor Juan F. Luis Hospital & Medical Center

  • General Acute Care Hospital
  • Christiansted, St. Croix, VI
  • NPI 1972503647
  Medicare reassignment NPD
• Century Integrated Partners, Inc

  • Emergency Medicine Physician
  • Dallas, TX
  • NPI 1447615711
  Medicare reassignment
• Scott & White Hospital - Taylor

  • Nurse Practitioner
  • Taylor, TX
  • NPI 1659548568
  Medicare reassignment
• Governor Juan F. Luis Hospital & Medical Center

  • End-Stage Renal Disease (ESRD) Treatment Clinic/Center
  • St Croix, VI
  • NPI 1740238534
  NPD

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

• Christus Santa Rosa Health Care Corporation

  • General Acute Care Hospital
  • New Braunfels, TX
  • NPI 1114725033
  Care Compare affiliation
• Christus Santa Rosa Health Care Corporation

  • General Acute Care Hospital
  • San Marcos, TX
  • NPI 1447883301
  Care Compare affiliation
• McAllen Hospitals L P

  • Cardiac Rehabilitation Clinic/Center
  • McAllen, TX
  • NPI 1043849425

  Hospital

  Care Compare affiliation
• McAllen Hospitals L P

  • Psychiatric Hospital Unit
  • Edinburg, TX
  • NPI 1053301754
  Care Compare affiliation
• McAllen Hospitals L P

  • General Acute Care Hospital
  • Edinburg, TX
  • NPI 1770573586
  Care Compare affiliation
• Scott & White Hospital - Round Rock

  • General Acute Care Hospital
  • Round Rock, TX
  • NPI 1265568638
  Care Compare affiliation
• St. David'S Healthcare Partnership, L.P., LLP

  • General Acute Care Hospital
  • Austin, TX
  • NPI 1679528889
  Care Compare affiliation

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

{
    "created_epoch": "1181606400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782259200000",
    "number": "1669676979",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 844658",
            "city": "DALLAS",
            "state": "TX",
            "postal_code": "752844658",
            "telephone_number": "800-994-0371",
            "fax_number": "254-215-9722"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "300 UNIVERSITY BLVD",
            "city": "ROUND ROCK",
            "state": "TX",
            "postal_code": "786651032",
            "telephone_number": "512-509-0100",
            "fax_number": "512-218-6330"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "REYES MERCADO",
        "first_name": "LUIS",
        "middle_name": "ANGEL",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-06-12",
        "last_updated": "2026-06-24",
        "certification_date": "2026-06-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "TX",
            "license": "P4804",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "lreyesmercado1521403@direct.sw.org",
            "affiliation": "N",
            "address_1": "300 University Blvd",
            "city": "Round Rock",
            "state": "TX",
            "country_code": "US",
            "postal_code": "786651032",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": [
        {
            "first_name": "LUIS",
            "last_name": "REYES MERCADO",
            "prefix": "DR.",
            "credential": "MD",
            "code": "2",
            "type": "Professional Name"
        }
    ]
}

• Retina Physicians of Central Texas PLLC
• Jessica Carmen Reuben, M.D.
• Hannah Katherine Reveile
• Bryan Mitchell Revelle, DPM
• Rewind Minds
• Roxana Reyes Ortega
• Elisa Reyes
• Emilie Anne Reyes, MSN, APRN, ACNPC-AG
• Rudy Reyes
• Cyndi Michelle Reynolds, MSN, APRN, FNP-C

• Emergency Medicine Physician in Round Rock, TX
• Providers in Round Rock, 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 Jun 24, 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.