Quick answers
- Does Diana Chapa accept Medicare assignment?
- Yes. Medicare's clinician data says Diana Chapa 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 Diana Chapa see?
- In 2024, CMS data shows 14 Original Medicare patients and 62 services for Diana Chapa. This counts Original Medicare only and measures volume, not quality.
- What is Diana Chapa's NPI number?
- 1811965528. 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 Diana Chapa, 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 | 14 |
|---|---|
| Services billed to Medicare | 62 |
| Different services or procedures | 6 |
| Participating Medicare provider | Yes |
| Average age of these patients | 67 |
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%
- Anxiety75%
Practice locations
Addresses where Diana Chapa is enrolled with Medicare (CMS data updated October 2, 2026).
- 205 E Toronto AveMcAllen, TX 78503 (956) 296‑3990
- 2810 W Expressway, 83 Knapp Family Practice Residency ClinicMercedes, TX 78570 (833) 887‑4863
- 2902 Haine DrHarlingen, TX 78550 (956) 296‑4000
Group practices
Medicare enrollment lists Diana Chapa as a member of this group (CMS data updated October 2, 2026).
- University of Texas Rio Grande Valley85 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in McAllen
Clinicians with the same Medicare primary specialty in McAllen, TX — not a recommendation.
Other clinicians in University of Texas Rio Grande Valley
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Wisconsin School Of Medicine |
| Graduation year | 1995 (31 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1811965528 |
| 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
- 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