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DR. AARON ONYANGO OBARE SILVERSTEIN MD
NPI 1316523418
Internal Medicine in Saint Louis, MO

Active since March 20, 2021PECOS Enrolled
3844 S LINDBERGH BLVD STE 120, SAINT LOUIS, MO 63127(314) 525-0490(314) 525-0434 Get Directions Write a Review

NPPES record last updated: September 19, 2025. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 19, 2025, Jun 25, 2024, Jun 20, 2024 and 3 more (6 updates tracked since 2021).

About Dr. Aaron Onyango Obare Silverstein Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. AARON ONYANGO OBARE SILVERSTEIN MD (NPI 1316523418) is an individual internal medicine provider in Saint Louis, Missouri, licensed in Missouri (2024017053) and active in the NPI registry since March 2021. He is enrolled in Medicare PECOS, is affiliated with Barnes Jewish Hospital, and is a graduate of Washington University School Of Medicine (2021).

NPPES Registry Identity

NPI1316523418
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. AARON ONYANGO OBARE SILVERSTEINCredential: MD
Location Address3844 S LINDBERGH BLVD STE 120Saint Louis, MO 63127-1369
Mailing Address660 Mason Ridge Center Dr Ste 300Saint Louis, MO 63141-8512 · (314) 448-3791 · Fax (314) 996-7658
Phone(314) 525-0490
Fax(314) 525-0434
Sole ProprietorYes
Medical School CMSWashington University School Of MedicineGraduated 2021
Enumeration DateMarch 20, 2021
Last NPPES UpdateSeptember 19, 20256 updates tracked since enumeration
NPPES CertifiedSeptember 19, 2025
✔ NPI 1316523418 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MO · 2024017053
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
3844 S LINDBERGH BLVD STE 120, Saint Louis, MO 63127
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include UnitedHealthcare.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Aaron Onyango Obare Silverstein Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID42614240
PECOS Enrollment IDI20240813001662
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Aaron Silverstein reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Physician Groups Lc
7.3 mi
Multi-Specialty
670 MASON RIDGE CENTER DR STE 300
Saint Louis, MO 63141
  • Reassigned Medicare billing, Missouri enrollment
  • 611 clinicians in this Medicare group
NPI 1285664268 (314) 996-7644

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 11

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
142 services108 patients
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use 90677
The Pneumococcal Conjugate Vaccine (PCV20) is a shot given to protect against 20 types of bacteria that can cause serious infections like pneumonia and meningitis. It's administered through a muscle, usually in the arm. It's important for overall health.
61 services61 patients
Administration of pneumococcal vaccine G0009
The pneumococcal vaccine helps protect against pneumococcal bacteria, which can cause severe infections like pneumonia and meningitis. The vaccine is given as an injection, typically in the arm. It's recommended for infants, older adults, and those with certain health conditions.
61 services61 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
59 services59 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
49 services49 patients
Influenza vaccine split virus, preservative free 90662
The Influenza Vaccine Split Virus, preservative-free, is a flu shot to protect against the influenza virus. It is made from parts of inactivated flu viruses and doesn't contain preservatives, reducing potential side effects. It helps your body develop immunity to the flu.
40 services40 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Barnes Jewish Hospital

Acute Care Hospitals · Saint Louis, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number260032
LocationOne Barnes-Jewish Hospital PlazaSaint Louis, MO 63110 · St. Louis City County
Emergency services Birthing friendly

Missouri Baptist Medical Center

Acute Care Hospitals · Town And Country, MO
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260108
Location3015 N Ballas RdTown And Country, MO 63131 · St. Louis County
Emergency services Birthing friendly

Barnes-Jewish West County Hospital

Acute Care Hospitals · Creve Coeur, MO
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260162
Location12634 Olive BoulevardCreve Coeur, MO 63141 · St. Louis County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63127 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

HOWARD D KOHN MD
Internal Medicine
3844 S LINDBERGH BLVD STE 120
SAINT LOUIS, MO 63127
St. Louis County (314) 525-0490
DR. MOYE PHILIP MATHEW DO
Internal Medicine
3844 S LINDBERGH BLVD STE 120
SAINT LOUIS, MO 63127
St. Louis County (314) 525-0490
MARY EHLMAN MD
Internal Medicine
3844 S LINDBERGH BLVD STE 120
SAINT LOUIS, MO 63127
St. Louis County (314) 525-0434
DR. DARRIN ABRAHAM JALLOH MD
Internal Medicine
3844 S LINDBERGH BLVD STE 120
SAINT LOUIS, MO 63127
St. Louis County (314) 525-0490
JANELLE ROETHEMEYER M.D.
Internal Medicine
3844 S LINDBERGH BLVD STE 120
SAINT LOUIS, MO 63127
St. Louis County (314) 525-0490
MARK C GUNBY DO
Internal Medicine (Geriatric Medicine)
3844 S LINDBERGH BLVD STE 120
SAINT LOUIS, MO 63127
St. Louis County (314) 525-0490
MS. PRIYANKA KRISHNAN MD
Family Medicine
3844 S LINDBERGH BLVD STE 120
SAINT LOUIS, MO 63127
St. Louis County (314) 525-0490
HIRALBEN B GANDHI FNP
Nurse Practitioner (Family)
3844 S LINDBERGH BLVD STE 120
SAINT LOUIS, MO 63127
St. Louis County (314) 525-0490

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Aaron Silverstein's NPI number?

The NPI number for Aaron Silverstein is 1316523418. It was assigned to this individual provider in the NPPES registry on March 20, 2021.

Where is Aaron Silverstein located?

Aaron Silverstein practices at 3844 S Lindbergh Blvd Ste 120, Saint Louis, MO 63127. The listed phone number is (314) 525-0490.

What is Aaron Silverstein's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Aaron Silverstein enrolled in Medicare?

Yes. Aaron Silverstein is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Aaron Silverstein's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Aaron Silverstein reassigns Medicare benefits to Physician Groups Lc (Saint Louis, MO). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Aaron Silverstein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Aaron Silverstein accept?

Health plans from UnitedHealthcare list Aaron Silverstein as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Aaron Silverstein affiliated with any hospitals?

According to CMS data, Aaron Silverstein is affiliated with Barnes Jewish Hospital, Missouri Baptist Medical Center and Barnes-Jewish West County Hospital.

When was this NPI record last updated?

The NPPES record for Aaron Silverstein was last updated on September 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.