DR. ARVIND RENGARAJAN MD
NPI 1427430057
Internal Medicine - Gastroenterology in Saint Louis, MO
About Dr. Arvind Rengarajan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ARVIND RENGARAJAN MD (NPI 1427430057) is an individual gastroenterology provider in Saint Louis, Missouri, licensed in Missouri (2018007161) and active in the NPI registry since June 2015. He is enrolled in Medicare PECOS, is affiliated with Memorial Hospital, and is a graduate of Washington University School Of Medicine (2015).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Arvind Rengarajan Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Arvind Rengarajan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- 1,133 clinicians in this Medicare group
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 15
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.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Memorial Hospital
Acute Care Hospitals · Belleville, ILBarnes Jewish Hospital
Acute Care Hospitals · Saint Louis, MOMissouri Baptist Medical Center
Acute Care Hospitals · Town And Country, MOBarnes-Jewish West County Hospital
Acute Care Hospitals · Creve Coeur, MOProgress West Hospital
Acute Care Hospitals · O Fallon, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
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 Arvind Rengarajan's NPI number?
The NPI number for Arvind Rengarajan is 1427430057. It was assigned to this individual provider in the NPPES registry on June 19, 2015.
Where is Arvind Rengarajan located?
Arvind Rengarajan practices at 1 Barnes Jewish Hospital Plz Div Im Gastroenterology, Saint Louis, MO 63110. The listed phone number is (314) 747-2066.
What is Arvind Rengarajan's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Arvind Rengarajan enrolled in Medicare?
Yes. Arvind Rengarajan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Arvind Rengarajan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Arvind Rengarajan reassigns Medicare benefits to Washington University (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 Arvind Rengarajan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Arvind Rengarajan accept?
Health plans from UnitedHealthcare list Arvind Rengarajan 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 Arvind Rengarajan affiliated with any hospitals?
According to CMS data, Arvind Rengarajan is affiliated with Memorial Hospital, Barnes Jewish Hospital, Missouri Baptist Medical Center, Barnes-Jewish West County Hospital and Progress West Hospital.
When was this NPI record last updated?
The NPPES record for Arvind Rengarajan was last updated on April 17, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Dr. Arvind Rengarajan, MD · NPI 1427430057
Gastroenterology physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since June 19, 2015.
## Identity
- **NPI:** 1427430057 (Entity type: Individual)
- **Enumerated:** June 19, 2015
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 2018007161 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 BARNES JEWISH HOSPITAL PLZ, DIV IM GASTROENTEROLOGY, Saint Louis, MO 63110-1003
- **Phone:** (314) 747-2066 · **Fax:** (314) 362-2357
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Washington University (NPI 1992746903, Saint Louis, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Washington University School Of Medicine, class of 2015
## Record status
- **NPPES last updated:** April 17, 2025
- **Other identifiers:** Medicaid 200056946 (MO)
---
Source: [NPI Profile](https://npiprofile.com/npi/1427430057) · Data from the CMS NPPES public registry.