John D Day, M.D.

Primary specialty

Neurological Surgery PhysicianTaxonomy code 207T00000X

License

41851 Issued in TX

Practice address

4301 W Markham St
#783
Little Rock, AR 72205-7101

Phone

(501) 686-7000

Fax

(501) 526-6562

NPI assigned

Sep 22, 2006

Last updated

Sep 24, 2026By 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 2

Addresses

Medicare fee-for-service enrollment

Enrolled in TX, AR2 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

Neurosurgery

Education

University of Washington School of Medicine, 1989

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Umc El Paso Healthcare IncGroup PAC ID 5395156996, 38 clinicians

El Paso County Hospital DistrictGroup PAC ID 2365431509, 208 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• University Medical Center of El Paso Hospital, El Paso, TX, CCN 450024

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://api.platform.athenahealth.com/24611/brand/1/csg/1/fhir/r4
• Direct secure messaging: john.day.1@24611.direct.athenahealth.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.

• El Paso County Hospital District

  dba University Medical Center of EL Paso

  • General Acute Care Hospital
  • El Paso, TX
  • NPI 1316936990
  Medicare reassignment Care Compare group NPD
• Umc El Paso Healthcare Inc

  • General Practice Physician
  • El Paso, TX
  • NPI 1528683810

  Neurological Surgery

  Medicare reassignment Care Compare group NPD
• Mercy Clinic Fort Smith Communities

  • Multi-Specialty Clinic/Center
  • Fort Smith, AR
  • NPI 1902073620
  Medicare reassignment NPD
• University of Arkansas for Medical Sciences

  • Internal Medicine Physician
  • Little Rock, AR
  • NPI 1588654016

  Neurological Surgery

  Medicare reassignment NPD
• Mercy Clinic Fort Smith Communities

  • Endocrinology, Diabetes & Metabolism Physician
  • Fort Smith, AR
  • NPI 1790258002
  NPD
• University of Arkansas for Medical Sciences

  • Family Medicine Physician
  • El Dorado, AR
  • NPI 1023795051
  NPD
• El Paso County Hospital District

  • General Acute Care Hospital
  • El Paso, TX
  • NPI 1619747938
  NPD
• Ozarks Medical Center

  dba Ozarks Healthcare

  • General Acute Care Hospital
  • West Plains, MO
  • NPI 1831115641
  NPD (past)
• Rocky Mountain Gamma Knife Center, LLC

  • Specialist
  • Aurora, CO
  • NPI 1346297421
  NPD (past)

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

• El Paso County Hospital District

  dba University Medical Center of EL Paso

  • General Acute Care Hospital
  • El Paso, TX
  • NPI 1316936990
  Care Compare affiliation
• El Paso County Hospital District

  • General Acute Care Hospital
  • El Paso, TX
  • NPI 1619747938
  Care Compare affiliation
• El Paso County Hospital District

  • Clinical Medical Laboratory
  • El Paso, TX
  • NPI 1932434925

  Hospital

  Care Compare affiliation

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

{
    "created_epoch": "1158883200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1790208000000",
    "number": "1043310006",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4301 W MARKHAM ST # 783",
            "city": "LITTLE ROCK",
            "state": "AR",
            "postal_code": "722057101",
            "telephone_number": "501-686-7000",
            "fax_number": "501-526-6562"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4301 W MARKHAM ST",
            "address_2": "#783",
            "city": "LITTLE ROCK",
            "state": "AR",
            "postal_code": "722057101",
            "telephone_number": "501-686-7000",
            "fax_number": "501-526-6562"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "602 Indiana Ave",
            "address_purpose": "LOCATION",
            "city": "Lubbock",
            "state": "TX",
            "postal_code": "794153364",
            "country_code": "US",
            "telephone_number": "806-761-0535",
            "fax_number": "806-761-0534",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3502 9th St Ste 430",
            "address_purpose": "LOCATION",
            "city": "Lubbock",
            "state": "TX",
            "postal_code": "794153368",
            "country_code": "US",
            "telephone_number": "806-761-0535",
            "fax_number": "806-761-0534",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "DAY",
        "first_name": "JOHN",
        "middle_name": "D",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-09-22",
        "last_updated": "2026-09-24",
        "certification_date": "2026-09-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207T00000X",
            "taxonomy_group": "",
            "desc": "Neurological Surgery",
            "state": "TX",
            "license": "41851",
            "primary": true
        },
        {
            "code": "207T00000X",
            "taxonomy_group": "",
            "desc": "Neurological Surgery",
            "state": "TX",
            "license": "M7937",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Shaterrica Dawson
• Wendy Dawson, NP-C
• Kathy M Day Sims
• Debra A Day, APNP
• Jennifer L Day, PHARMD
• Jordan Elizabeth Day, BT
• Mary Elizabeth Day, M.S. , R.D.
• Stephanie Renee Dayer, MD
• Dayspring Services of Arkansas LLC
• Dayspring Services of Arkansas LLC

• Neurological Surgery Physician in Little Rock, AR
• Providers in Little Rock, AR by specialty
• Neurological Surgery Physician in Arkansas

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