Quick answers
- Which hospitals does Joseph Y. Ahn work at?
- Medicare's official clinician data lists Joseph Y. Ahn at 4 hospitals: Harlingen Medical Center, Knapp Medical Center, South Texas Health System and Valley Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Joseph Y. Ahn see patients?
- Medicare's clinician data lists 6 practice locations, including Brownsville, TX, Edinburg, TX and Alamo, TX. Call before your visit to confirm the address.
- What is Joseph Y. Ahn's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Joseph Y. Ahn accept Medicare assignment?
- Yes. Medicare's clinician data says Joseph Y. Ahn 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 Joseph Y. Ahn?
- (956) 350-7000, as listed in official Medicare / NPI Registry data.
- What is Joseph Y. Ahn's NPI number?
- 1487789863. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Joseph Y. Ahn works
Medicare's Facility Affiliation Data lists Joseph Y. Ahn at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Harlingen Medical CenterHarlingen, TX · Acute Care Hospital · CCN 450855
- Knapp Medical CenterWeslaco, TX · Acute Care Hospital · CCN 450128
- South Texas Health SystemEdinburg, TX · Acute Care Hospital · CCN 450119
- Valley Regional Medical CenterBrownsville, TX · Acute Care Hospital · CCN 450662
Practice locations
Addresses where Joseph Y. Ahn is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 100 E Alton Gloor Blvd, Valley Regional Medical CenterBrownsville, TX 78526 (956) 350‑7000
- 1102 W Trenton RdEdinburg, TX 78539 (956) 388‑6000
- 140 Frontage RdAlamo, TX 78516 (956) 403‑5100
- 1900 S D StMcAllen, TX 78503 (956) 994‑2000
- 301 W Expressway, Suite 83McAllen, TX 78503 (956) 632‑4000
Group practices
Medicare enrollment lists Joseph Y. Ahn as a member of these groups (CMS data updated 2026-10-02).
- Emergency Medicine Services of TX, PLLC400 clinicians in the group
- McAllen Emergency Medicine Associates PA79 clinicians in the group
- Edinburg Emergency Medicine Associates PA72 clinicians in the group
- Canyon Springs Emergency Medicine Associates PA58 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Brownsville
Clinicians with the same Medicare primary specialty in Brownsville, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Michigan Medical School |
| Graduation year | 2006 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1487789863 |
| 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