Quick answers
- Does Chu En Lin accept Medicare assignment?
- Yes. Medicare's clinician data says Chu En Lin 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 Chu En Lin see?
- In 2024, CMS data shows 263 Original Medicare patients and 417 services for Chu En Lin. This counts Original Medicare only and measures volume, not quality.
- What is Chu En Lin's NPI number?
- 1013327782. 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 Chu En Lin, 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 | 263 |
|---|---|
| Services billed to Medicare | 417 |
| Different services or procedures | 15 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)167 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)120 services
- Critical care, first 30-74 minutes (99291)58 services
- Emergency department visit with moderate level of medical decision making (99284)43 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%
- Arthritis55%
- Diabetes47%
- Ischemic heart disease45%
- Chronic kidney disease42%
Hospitals where Chu En Lin works
Medicare's Facility Affiliation Data lists Chu En Lin 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.
- CHRISTUS Santa Rosa Hospital-San MarcosSan Marcos, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450272
- South Texas Health SystemEdinburg, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 450119
- VHS Harlingen Hospital Company LLCHarlingen, TX · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 450033
- Yoakum Community HospitalYoakum, TX · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 451346
Practice locations
Addresses where Chu En Lin is enrolled with Medicare (CMS data updated October 2, 2026).
- 1301 Wonder World DrSan Marcos, TX 78666 (512) 353‑8979
- 1725 N Ed Carey DrHarlingen, TX 78550 (956) 389‑4382
- 1900 S D StMcAllen, TX 78503 (956) 994‑2000
- 301 W Expressway, Suite 83McAllen, TX 78503 (956) 632‑4000
- 600 N Union AveNew Braunfels, TX 78130 (830) 606‑9111
Group practices
Medicare enrollment lists Chu En Lin as a member of these groups (CMS data updated October 2, 2026).
- Comal Emergency Physicians PLLC91 clinicians in the group
- McAllen Emergency Medicine Associates PA79 clinicians in the group
- Arroyo Emergency Medicine Services, PA49 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in San Marcos
Clinicians with the same Medicare primary specialty in San Marcos, TX — not a recommendation.
Other clinicians in Comal Emergency Physicians PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2013 (13 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1013327782 |
| 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