DR. ANDREW L. WARREN MD
NPI 1649689282
Radiology - Vascular & Interventional Radiology in Saint Louis, MO
About Dr. Andrew L. Warren Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ANDREW L. WARREN MD (NPI 1649689282) is an individual vascular & interventional radiology provider in Saint Louis, Missouri, licensed in Missouri (2015003759) and active in the NPI registry since August 2014. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and is a graduate of University Of Utah School Of Medicine (2012).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 2
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. Andrew L. Warren 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 Reassignments
3Medicare enrollment records show Andrew Warren reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 86 clinicians in this Medicare group
Chesterfield, MO 63017
- Reassigned Medicare billing, Missouri enrollment
- 32 clinicians in this Medicare group
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- 373 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 84
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.
Mercy Hospital St Louis
Acute Care Hospitals · Saint Louis, MOMercy Hospital Jefferson
Acute Care Hospitals · Festus, MOMercy Hospital South
Acute Care Hospitals · Saint Louis, MOMercy Hospital Ada
Acute Care Hospitals · Ada, OKMercy Hospital Ardmore, Inc
Acute Care Hospitals · Ardmore, OKPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63141 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 63141
SAINT LOUIS, MO 63141
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 Andrew Warren's NPI number?
The NPI number for Andrew Warren is 1649689282. It was assigned to this individual provider in the NPPES registry on August 7, 2014.
Where is Andrew Warren located?
Andrew Warren practices at 615 S New Ballas Rd, Saint Louis, MO 63141. The listed phone number is (142) 516-0313.
What is Andrew Warren's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Vascular & Interventional Radiology, with taxonomy code 2085R0204X.
Is Andrew Warren enrolled in Medicare?
Yes. Andrew Warren 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 organizations bill Medicare for Andrew Warren's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Andrew Warren reassigns Medicare benefits to 3 organizations: West County Radiological Group, Inc. (Saint Louis, MO), Diagnostic Imaging Associates Ltd (Chesterfield, MO) and Washington University (Saint Louis, MO). Each 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 Andrew Warren's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Andrew Warren affiliated with any hospitals?
According to CMS data, Andrew Warren is affiliated with Mercy Hospital St Louis, Mercy Hospital Jefferson, Mercy Hospital South, Mercy Hospital Ada and Mercy Hospital Ardmore, Inc.
When was this NPI record last updated?
The NPPES record for Andrew Warren was last updated on November 20, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years 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.