Quick answers
- Does Ruben R. Aymerich accept Medicare assignment?
- Yes. Medicare's clinician data says Ruben R. Aymerich 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 Ruben R. Aymerich see?
- In 2024, CMS data shows 378 Original Medicare patients and 626 services for Ruben R. Aymerich. This counts Original Medicare only and measures volume, not quality.
- What is Ruben R. Aymerich's NPI number?
- 1609858562. 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 Ruben R. Aymerich, 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 | 378 |
|---|---|
| Services billed to Medicare | 626 |
| Different services or procedures | 47 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)99 services
- Biopsy of large bowel using a flexible endoscope (45380)76 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)59 services
- Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes (99223)49 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)47 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%
- Arthritis48%
- Ischemic heart disease35%
- Depression35%
- Anxiety35%
Hospitals where Ruben R. Aymerich works
Medicare's Facility Affiliation Data lists Ruben R. Aymerich at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Missouri Baptist Medical CenterSaint Louis, MO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 260108
- SSM Health St Mary's Hospital - St LouisSaint Louis, MO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 260091
- SSM St Clare Health CenterFenton, MO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 260081
Practice locations
Addresses where Ruben R. Aymerich is enrolled with Medicare (CMS data updated October 2, 2026).
- 1015 Bowles AveFenton, MO 63026 (636) 496‑2000
- 1035 Bellevue Ave, Suite 500Saint Louis, MO 63117
- 6420 Clayton RdRichmond Heights, MO 63117 (314) 768‑8267
- 6420 Clayton RdSaint Louis, MO 63117
Group practices
Medicare enrollment lists Ruben R. Aymerich as a member of this group (CMS data updated October 2, 2026).
- SSM Medical Group Inc568 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Missouri
Clinicians with the same Medicare primary specialty in Missouri — not a recommendation.
Other clinicians in SSM Medical Group Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Puerto Rico School Of Medicine |
| Graduation year | 1996 (30 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1609858562 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- 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