Quick answers
- Does Manuel A. Santini Santiago accept Medicare assignment?
- Yes. Medicare's clinician data says Manuel A. Santini Santiago 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 Manuel A. Santini Santiago see?
- In 2024, CMS data shows 38 Original Medicare patients and 105 services for Manuel A. Santini Santiago. This counts Original Medicare only and measures volume, not quality.
- What is Manuel A. Santini Santiago's NPI number?
- 1346243722. 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 Manuel A. Santini Santiago, 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 | 38 |
|---|---|
| Services billed to Medicare | 105 |
| 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)50 services
- Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)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%
- Diabetes58%
- Arthritis55%
- Chronic kidney disease34%
Practice locations
Addresses where Manuel A. Santini Santiago is enrolled with Medicare (CMS data updated October 2, 2026).
- 369 De Diego St, Suite 406Rio Piedras, PR 00923 (787) 764‑0738
Specialties
- Gastroenterologyprimary
- Internal Medicinealso
Other gastroenterologists in Puerto Rico
Clinicians with the same Medicare primary specialty in Puerto Rico — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1978 (48 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346243722 |
| 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