Quick answers
- Does Porfirio E. Diaz Romero accept Medicare assignment?
- Yes. Medicare's clinician data says Porfirio E. Diaz Romero 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 Porfirio E. Diaz Romero see?
- In 2024, CMS data shows 99 Original Medicare patients and 458 services for Porfirio E. Diaz Romero. This counts Original Medicare only and measures volume, not quality.
- What is Porfirio E. Diaz Romero's NPI number?
- 1942399126. 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 Porfirio E. Diaz Romero, 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 | 99 |
|---|---|
| Services billed to Medicare | 458 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)163 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)130 services
- Ultrasound of heart with color-depicted blood flow, rate, direction and valve function (93306)51 services
- Ultrasound of both sides of head and neck blood flow (93880)17 services
- New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)16 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%
- Diabetes51%
- Arthritis47%
- Chronic kidney disease28%
- Osteoporosis23%
Practice locations
Addresses where Porfirio E. Diaz Romero is enrolled with Medicare (CMS data updated October 2, 2026).
- 525 Ave Fd RooseveltSan Juan, PR 00918 (787) 414‑8294
Specialties
Other internal medicine doctors in San Juan
Clinicians with the same Medicare primary specialty in San Juan, PR — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1992 (34 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1942399126 |
| 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