Quick answers
- Which hospitals does Mark U. Liong work at?
- Medicare's official clinician data lists Mark U. Liong at 3 hospitals: Doctors Hosptal at Renaissance, Knapp Medical Center and South Texas Health System. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark U. Liong see patients?
- Medicare's clinician data lists 1 practice location in McAllen, TX. Call before your visit to confirm the address.
- What is Mark U. Liong's specialty?
- Medicare lists Nephrology as the primary specialty, and also Internal Medicine.
- Does Mark U. Liong accept Medicare assignment?
- Yes. Medicare's clinician data says Mark U. Liong 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 U. Liong?
- (956) 631-6136, as listed in official Medicare / NPI Registry data.
- What is Mark U. Liong's NPI number?
- 1346422078. 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 U. Liong works
Medicare's Facility Affiliation Data lists Mark U. Liong at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Doctors Hosptal at RenaissanceEdinburg, TX · Acute Care Hospital · CCN 450869
- Knapp Medical CenterWeslaco, TX · Acute Care Hospital · CCN 450128
- South Texas Health SystemEdinburg, TX · Acute Care Hospital · CCN 450119
Practice locations
Addresses where Mark U. Liong is enrolled with Medicare (CMS data updated 2026-10-02).
- 1901 S 1st St, Suite 600McAllen, TX 78503 (956) 631‑6136
Group practices
Medicare enrollment lists Mark U. Liong as a member of this group (CMS data updated 2026-10-02).
- South Texas Kidney Specialists, P.A.15 clinicians in the group
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in McAllen
Clinicians with the same Medicare primary specialty in McAllen, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2004 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346422078 |
| 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