Quick answers
- Does Chang Myung accept Medicare assignment?
- Yes. Medicare's clinician data says Chang Myung accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Chang Myung see?
- In 2024, CMS data shows 52 Original Medicare patients and 111 services for Chang Myung. This counts Original Medicare only and measures volume, not quality.
- What is Chang Myung's NPI number?
- 1437176971. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Chang Myung, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 52 |
|---|---|
| Services billed to Medicare | 111 |
| Different services or procedures | 35 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Insertion of artery tube for blood sampling or infusion through skin (36620)19 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Diabetes67%
- Ischemic heart disease63%
- Chronic kidney disease52%
- Arthritis50%
Hospitals where Chang Myung works
Medicare's Facility Affiliation Data lists Chang Myung at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Rio Grande Regional HospitalMcAllen, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450711
- Valley Regional Medical CenterBrownsville, TX · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 450662
Practice locations
Addresses where Chang Myung is enrolled with Medicare (CMS data updated October 2, 2026).
- 101 E Ridge Rd, Rio Grande Regional HospitalMcAllen, TX 78503 (956) 632‑6000
- 7101 S Padre Island DrCorpus Christi, TX 78412 (877) 882‑9099
Group practices
Medicare enrollment lists Chang Myung as a member of these groups (CMS data updated October 2, 2026).
- Rio Grande Anesthesia and Pain Medicine Consultants, P .A.41 clinicians in the group
- Northstar Anesthesia II PA22 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in McAllen
Clinicians with the same Medicare primary specialty in McAllen, TX — not a recommendation.
Other clinicians in Rio Grande Anesthesia and Pain Medicine Consultants, P .A.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1437176971 |
| 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 October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- 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