Quick answers
- Which hospitals does Mark C. Littlejohn work at?
- Medicare's official clinician data lists Mark C. Littlejohn at 3 hospitals: CHRISTUS Good Shepherd Medical Center, CHRISTUS Mother Frances Hospital and Longview Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark C. Littlejohn see patients?
- Medicare's clinician data lists 4 practice locations, including Tyler, TX, Longview, TX and Dallas, TX. Call before your visit to confirm the address.
- What is Mark C. Littlejohn's specialty?
- Medicare lists Otolaryngology as the primary specialty.
- Does Mark C. Littlejohn accept Medicare assignment?
- Yes. Medicare's clinician data says Mark C. Littlejohn 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 Mark C. Littlejohn?
- (903) 606-4900, as listed in official Medicare / NPI Registry data.
- What is Mark C. Littlejohn's NPI number?
- 1932176252. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark C. Littlejohn works
Medicare's Facility Affiliation Data lists Mark C. Littlejohn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- CHRISTUS Good Shepherd Medical CenterLongview, TX · Acute Care Hospital · CCN 450032
- CHRISTUS Mother Frances HospitalTyler, TX · Acute Care Hospital · CCN 450102
- Longview Regional Medical CenterLongview, TX · Acute Care Hospital · CCN 450702
Practice locations
Addresses where Mark C. Littlejohn is enrolled with Medicare (CMS data updated 2026-10-02).
- 620 S Fleishel Ave, CHRISTUS Trinity ClinicTyler, TX 75701 (903) 606‑4900
- 630 S Fleishel AveTyler, TX 75701 (903) 606‑5560
- 700 E Marshall Ave, CHRISTUS Trinity ClinicLongview, TX 75601 (903) 315‑1488
- PO Box, Suite 846098Dallas, TX 75284
Group practices
Medicare enrollment lists Mark C. Littlejohn as a member of this group (CMS data updated 2026-10-02).
- CHRISTUS Trinity Clinic Texas1,540 clinicians in the group
Specialties
- Otolaryngologyprimary
Other ENT doctors in Tyler
Clinicians with the same Medicare primary specialty in Tyler, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical Branch At Galveston |
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1932176252 |
| 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