Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Sean Michael Arrieta Villaflores, MD

Individual provider Internal Medicine Physician · NPI 1821678962

Sean Michael Arrieta Villaflores, MD practises Internal Medicine in Richmond Heights, Missouri. Qualified in 2018, 8 years ago. Practices with American Multispecialty Group Inc, a 118-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
8
Licensed in
MO
In the registry since
2021
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

1027 Bellevue Ave Ste 107
Richmond Heights, MO 63117-1851
Phone: (314) 645-3743
Fax: (314) 647-7967
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 2024030784 (MO)

Record details

NPI number1821678962
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 13, 2021
Last updated in NPPESAugust 22, 2024
Certification dateAugust 22, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Medical schoolOTHER
Graduated 2018 (8 years in practice)
Group practice American Multispecialty Group Inc — 118 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients84
Services billed 350 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $428 23 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Barnes Jewish Hospital Hospital · Saint Louis, MO
  • Mercy Hospital St Louis Hospital · Saint Louis, MO · listed as Mercy Hospitals East Communities Mercy Hospital St Louis
  • Missouri Baptist Medical Center Hospital · Saint Louis, MO
  • St Lukes Hospital Hospital · Chesterfield, MO
  • Ssm Health St Mary'S Hospital - St Louis Hospital · Saint Louis, MO
  • Amedisys Home Health Of Missouri Home health agency · Hillsboro, MO
  • Ssm Health At Home Home Health-St. Louis Home health agency · Saint Louis, MO

Also affiliated with 1 inpatient rehabilitation facility, which CMS identifies by certification number only.

Colleagues at American Multispecialty Group Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 118 clinicians in the practice; 12 are shown here.

Other providers in Richmond Heights