Kevin Cornelius McMahon, M.D.

Primary specialty

Neurology PhysicianTaxonomy code 2084N0400X

License

Q3049 Issued in TX

Practice address

417 S. King Street
GRMG Neurology Associates
Seguin, TX 78155-5126

Phone

(830) 484-4608

NPI assigned

Jun 30, 2010

Last updated

Jun 19, 2026By the provider in NPPES

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

Neurology

Education

Other, 2010

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Neurohospitalist of McAllen, PLLCGroup PAC ID 5294085684, 8 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Rio Grande Regional Hospital Hospital, McAllen, TX, CCN 450711
• Valley Regional Medical Center Hospital, Brownsville, TX, CCN 450662

Merit-based Incentive Payment System (MIPS)

Final score

100 of 100Reported as individual

Quality

100

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://fhir.meditouchehr.com/api/fhir/r4/
• Direct secure messaging: kevin.mcmahon@hca9.eclinicaldirectplus.com

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.

• Neurohospitalist of McAllen, PLLC

  • Neurology Physician
  • McAllen, TX
  • NPI 1609395334
  Medicare reassignment Care Compare group NPD
• Neuline Health Management LLC

  dba NeuLine Health

  • Physiological Laboratory
  • McKinney, TX
  • NPI 1528507795
  NPD

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

• Columbia Rio Grande Healthcare, L.P.

  dba Rio Grande Regional Hospital

  • General Acute Care Hospital
  • McAllen, TX
  • NPI 1619924719
  Care Compare affiliation
• Columbia Valley Healthcare System, L.P.

  dba Valley Regional Medical Center

  • General Acute Care Hospital
  • Brownsville, TX
  • NPI 1043267701
  Care Compare affiliation

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

{
    "created_epoch": "1277856000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1781827200000",
    "number": "1124339528",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1215 E COURT ST",
            "address_2": "GUADALUPE REGIONAL MEDICAL GROUP",
            "city": "SEGUIN",
            "state": "TX",
            "postal_code": "781555129",
            "telephone_number": "830-484-4608"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "417 S. KING STREET",
            "address_2": "GRMG NEUROLOGY ASSOCIATES",
            "city": "SEGUIN",
            "state": "TX",
            "postal_code": "781555126",
            "telephone_number": "830-484-4608"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2406 Stirling Ave",
            "address_purpose": "LOCATION",
            "city": "Edinburg",
            "state": "TX",
            "postal_code": "785392706",
            "country_code": "US",
            "telephone_number": "413-464-6740",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "MCMAHON",
        "first_name": "KEVIN",
        "middle_name": "CORNELIUS",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2010-06-30",
        "last_updated": "2026-06-19",
        "certification_date": "2026-06-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "CT",
            "license": null,
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "TX",
            "license": "Q3049",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Celina D McCown, NP
• Johanna McCray
• Cade Gavin McDonald, MAT, LAT, ATC
• Christie Anne McGuire, RN, CA-SANE, CP-SANE
• Christina M McKay, PHARM.D.
• Donna Louise Mechler, PT
• Stephanie Lynn Medders, RN
• Medina County Hospital District (Guadalupe Valley Nursing and Rehabilitation Center)
• Simone Melhuish
• Karen Melton, OT

• Neurology Physician in Seguin, TX
• Providers in Seguin, TX by specialty
• Neurology Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jun 19, 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.