Quick answers
- Does Horacio A. Diaz accept Medicare assignment?
- Yes. Medicare's clinician data says Horacio A. Diaz 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 Horacio A. Diaz see?
- In 2024, CMS data shows 352 Original Medicare patients and 609 services for Horacio A. Diaz. This counts Original Medicare only and measures volume, not quality.
- What is Horacio A. Diaz's NPI number?
- 1912999699. 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 Horacio A. Diaz, 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 | 352 |
|---|---|
| Services billed to Medicare | 609 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Emergency department visit with high level of medical decision making (99285)216 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only (93010)201 services
- Emergency department visit with moderate level of medical decision making (99284)83 services
- Critical care, first 30-74 minutes (99291)64 services
- Insertion of non-tunneled central venous tube for infusion (5 years or older) (36556)12 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%
- Diabetes72%
- Arthritis56%
- Ischemic heart disease52%
- Chronic kidney disease51%
Practice locations
Addresses where Horacio A. Diaz is enrolled with Medicare (CMS data updated October 2, 2026).
- 1700 E Saunders StLaredo, TX 78041 (956) 796‑5000
- 3402 E Del Mar Blvd, Suite 184Laredo, TX 78041 (956) 267‑4667
Group practices
Medicare enrollment lists Horacio A. Diaz as a member of these groups (CMS data updated October 2, 2026).
- Laredo Emergency Medicine Associates PA46 clinicians in the group
- Wellness Whisper PLLC2 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Laredo
Clinicians with the same Medicare primary specialty in Laredo, TX — not a recommendation.
Other clinicians in Laredo Emergency Medicine Associates PA
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1988 (38 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1912999699 |
| 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