Aaron Onyango Obare Silverstein, MD
Internal Medicine Physician · Saint Louis, MO
Aaron Onyango Obare Silverstein, MD is an internal medicine physician with a practice address in Saint Louis, Missouri, and NPI 1316523418, issued on Mar 20, 2021. Check the license (Missouri 2024017053, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Aaron Onyango Obare Silverstein
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 2024017053 MO
Self-reported in NPPES; status is on the state search - Practice location
- 3844 S Lindbergh Blvd Ste 120, Saint Louis, MO 63127
- Phone
- (314) 525-0490
- Enumerated
- Mar 20, 2021
- Record last updated
- Sep 19, 2025
- Fax
- (314) 525-0434
- Medicare enrollment
- Enrolled (PECOS I20240813001662); may accept Medicare assignment
- Medical or professional school
- Washington University School Of Medicine, 2021
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 3844 S Lindbergh Blvd Ste 120
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Aaron Onyango Obare Silverstein 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 2024017053Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,990 Medicare Part D claims for 462 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 77 claims were for opioids.
Most prescribed
- Rosuvastatin Calcium165 claims
- Atorvastatin Calcium116 claims
- Amlodipine Besylate73 claims
- Lisinopril63 claims
- Omeprazole45 claims
- Tamsulosin Hcl39 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.
Industry payments in 2024: $51.33
3 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Physician Groups LCSaint Louis, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Aaron Onyango Obare Silverstein among 2,604 internal medicine physician records in Missouri
Aaron Onyango Obare Silverstein, MD is one of 2,604 internal medicine physician records with a practice address in Missouri. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 79% of them.
- NPI issued2021 · 79% of these records are older, 17% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2021 · median 2006 among the 1,443 with a school on file
- Record last updated2025 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
941 internal medicine physician records list a practice address in Saint Louis
They are 941 of the 27,605 NPPES records with a practice address in Saint Louis, and 2,604 internal medicine physician records in Missouri.
All 2,604 in Missouri → Every provider in Saint Louis → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Peter Bettonville, M.D.St Louis, MO 631271144273657
- Amita Bhalla, M.D.Saint Louis, MO 631271396754842
- Sirisha Brosch, M.D.Saint Louis, MO 631271215197173
- Mary Ehlman, MDSaint Louis, MO 631271235579012
- Chisom Eze, MDSaint Louis, MO 631271821527649
- Robert Fischer, M.D.St Louis, MO 631271548214455
- Kelly Gage, M.D.St Louis, MO 631271710930219
- Justin Huynh, M.D.Saint Louis, MO 631271902096613
Common questions
What is Aaron Onyango Obare Silverstein, MD's NPI number?
Aaron Onyango Obare Silverstein, MD's National Provider Identifier (NPI) is 1316523418, issued on Mar 20, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Aaron Onyango Obare Silverstein, MD located?
The NPPES record lists a practice address at 3844 S Lindbergh Blvd Ste 120, Saint Louis, MO, 63127. Phone: (314) 525-0490. Providers update this record themselves, so call before visiting.
How can I verify Aaron Onyango Obare Silverstein, MD's license?
NPPES lists Missouri license number 2024017053, 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 Aaron Onyango Obare Silverstein, MD prescribe under Medicare Part D?
In 2024, Aaron Onyango Obare Silverstein, MD had 1,990 Medicare Part D claims for 462 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.