Quick answers
- Does Merbil R. Gonzalez Diaz accept Medicare assignment?
- Yes. Medicare's clinician data says Merbil R. Gonzalez 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 Merbil R. Gonzalez Diaz see?
- In 2024, CMS data shows 60 Original Medicare patients and 250 services for Merbil R. Gonzalez Diaz. This counts Original Medicare only and measures volume, not quality.
- What is Merbil R. Gonzalez Diaz's NPI number?
- 1902878614. 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 Merbil R. Gonzalez 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 | 60 |
|---|---|
| Services billed to Medicare | 250 |
| Different services or procedures | 11 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)61 services
- Needle measurement of electrical activity in arm or leg muscles, complete study (95886)54 services
- Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional (99211)43 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)17 services
- Ultrasound of both sides of head and neck blood flow (93880)15 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%
- Stroke or mini-stroke73%
- Diabetes47%
- Chronic kidney disease43%
- Arthritis40%
Practice locations
Addresses where Merbil R. Gonzalez Diaz is enrolled with Medicare (CMS data updated October 2, 2026).
- 351 Ave Hostos, Suite 309Mayaguez, PR 00680 (787) 805‑7319
Specialties
- Neurologyprimary
Other neurologists in Mayaguez
Clinicians with the same Medicare primary specialty in Mayaguez, PR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Puerto Rico School Of Medicine |
| Graduation year | 1994 (32 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1902878614 |
| 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