Quick answers
- Which hospitals does John D. Day work at?
- Medicare's official clinician data lists John D. Day at 1 hospital: University Medical Center of El Paso. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John D. Day see patients?
- Medicare's clinician data lists 5 practice locations, including Lubbock, TX and El Paso, TX. Call before your visit to confirm the address.
- What is John D. Day's specialty?
- Medicare lists Neurosurgery as the primary specialty.
- Does John D. Day accept Medicare assignment?
- Yes. Medicare's clinician data says John D. Day accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for John D. Day?
- (806) 761-0535, as listed in official Medicare / NPI Registry data.
- What is John D. Day's NPI number?
- 1043310006. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John D. Day works
Medicare's Facility Affiliation Data lists John D. Day at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- University Medical Center of El PasoEl Paso, TX · Acute Care Hospital · CCN 450024
Practice locations
Addresses where John D. Day is enrolled with Medicare (CMS data updated 2026-10-02).
- 3502 9th St, Suite 430Lubbock, TX 79415 (806) 761‑0535
- 4500 N Mesa StEl Paso, TX 79912 (915) 532‑9000
- 4815 Alameda AveEl Paso, TX 79905 (915) 521‑7902
- 4845 Alameda AveEl Paso, TX 79905 (915) 298‑5444
- 602 Indiana AveLubbock, TX 79415 (806) 775‑8600
Group practices
Medicare enrollment lists John D. Day as a member of these groups (CMS data updated 2026-10-02).
- El Paso County Hospital District214 clinicians in the group
- UMC Physicians101 clinicians in the group
- UMC El Paso Healthcare Inc39 clinicians in the group
Specialties
- Neurosurgeryprimary
Other neurosurgeons in Lubbock
Clinicians with the same Medicare primary specialty in Lubbock, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Washington School Of Medicine |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043310006 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians