Ruben Ricardo Aymerich, MD
Gastroenterology Physician · Saint Louis, MO
Ruben Ricardo Aymerich, MD is a gastroenterology physician with a practice address in Saint Louis, Missouri, and NPI 1609858562, issued on Nov 16, 2005. Check the license (Missouri 111010, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Ruben Ricardo Aymerich
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 111010 MO
Self-reported in NPPES; status is on the state search - Practice location
- 6400 Clayton RD Ste 216, Saint Louis, MO 63117
- Phone
- (314) 646-7848
- Enumerated
- Nov 16, 2005
- Record last updated
- Nov 19, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20111101000475); accepts Medicare assignment
- Medical or professional school
- University Of Puerto Rico School Of Medicine, 1996
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 414 in Missouri → Look up another NPI →
Also registered at 6400 Clayton RD Ste 216
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Susan GryzmalaNurse Practitioner1023975075
- Liliana Ungureanu, NPNurse Practitioner1801459052
- Giao Vuong, M.D.Gastroenterology Physician1902034499
Verify Ruben Ricardo Aymerich in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license 111010Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% fewer Medicare Part D claims than the average gastroenterology physician in 2024
571 Medicare Part D claims for 187 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Pantoprazole Sodium149 claims
- Metronidazole37 claims
- Diphenoxylate-Atropine34 claims
- Prednisone27 claims
- Diphenhydramine Hcl25 claims
- Sodium Chloride23 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Ssm Medical Group IncFenton, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ruben Ricardo Aymerich among 414 gastroenterology physician records in Missouri
Ruben Ricardo Aymerich, MD is one of 414 gastroenterology physician records with a practice address in Missouri. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 86% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 73% of these records are
- Graduated1996 · median 2003 among the 303 with a school on file
- Record last updated2020 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in Missouri
There are 414 gastroenterology physician records in Missouri.
All 414 in Missouri → Every provider in Saint Louis → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Hani El-Halawany, M.D.Richmond Heights, MO 631171558633008
- Neil Frederickson, M.D.Saint Louis, MO 631171245385327
- Ronald Gould, M.D.Saint Louis, MO 631171811042708
- Michael Heavey, M.D.Saint Louis, MO 631171316089261
- Anna Niesen, MDSt Louis, MO 631171184709107
- Joel Riley, M.D.Saint Louis, MO 631171164440301
- Nicole Shen, M.D.Saint Louis, MO 631171073856027
- Giao Vuong, M.D.Saint Louis, MO 631171902034499
Common questions
What is Ruben Ricardo Aymerich, MD's NPI number?
Ruben Ricardo Aymerich, MD's National Provider Identifier (NPI) is 1609858562, issued on Nov 16, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ruben Ricardo Aymerich, MD located?
The NPPES record lists a practice address at 6400 Clayton RD Ste 216, Saint Louis, MO, 63117. Phone: (314) 646-7848. Providers update this record themselves, so call before visiting.
How can I verify Ruben Ricardo Aymerich, MD's license?
NPPES lists Missouri license number 111010, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ruben Ricardo Aymerich, MD prescribe under Medicare Part D?
In 2024, Ruben Ricardo Aymerich, MD had 571 Medicare Part D claims for 187 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.