DR. CARLOS ALFONSO QUILALA SANTOS MD
NPI 1023299393
Internal Medicine - Infectious Disease in Saint Louis, MO
About Dr. Carlos Alfonso Quilala Santos Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CARLOS ALFONSO QUILALA SANTOS MD (NPI 1023299393) is an individual infectious disease provider in Saint Louis, Missouri, licensed in Missouri (2009001296) and active in the NPI registry since November 2007. He is enrolled in Medicare PECOS, is affiliated with Rush University Medical Center, and is a graduate of Other (2002).
NPPES Registry Identity
Specialties & Licenses
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. Carlos Alfonso Quilala Santos 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
2Medicare enrollment records show Carlos Santos reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Normal, IL 61761
- Reassigned Medicare billing, Illinois enrollment
- 4,870 clinicians in this Medicare group
Oak Brook, IL 60523
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Rush University Medical Group
- 2,169 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 3
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Rush University Medical Center
Acute Care Hospitals · Chicago, ILPhysician 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.
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
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
SAINT LOUIS, MO 63141
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 Carlos Santos's NPI number?
The NPI number for Carlos Santos is 1023299393. It was assigned to this individual provider in the NPPES registry on November 15, 2007.
Where is Carlos Santos located?
Carlos Santos practices at 10 Barnes West Dr Pob 2 Ste 200, Saint Louis, MO 63141. The listed phone number is (314) 747-2066.
What is Carlos Santos's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Carlos Santos enrolled in Medicare?
Yes. Carlos Santos 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 Carlos Santos's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Carlos Santos reassigns Medicare benefits to 2 organizations: Advocate Health And Hospitals Corp. (Normal, IL) and Rush University Medical Center (Oak Brook, IL). 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 Carlos Santos's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Carlos Santos accept?
Health plans from Ambetter Health and Ambetter Health of Delaware list Carlos Santos 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 Carlos Santos affiliated with any hospitals?
According to CMS data, Carlos Santos is affiliated with Rush University Medical Center.
When was this NPI record last updated?
The NPPES record for Carlos Santos was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 28 days 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. Carlos Alfonso Quilala Santos, MD · NPI 1023299393
Infectious Disease physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since November 15, 2007.
## Identity
- **NPI:** 1023299393 (Entity type: Individual)
- **Enumerated:** November 15, 2007
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** 2009001296 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 10 BARNES WEST DR, POB 2 STE 200, Saint Louis, MO 63141-6350
- **Phone:** (314) 747-2066 · **Fax:** (314) 747-1277
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Advocate Health And Hospitals Corp. (NPI 1831420520, Normal, IL); Rush University Medical Center (NPI 1801375696, Oak Brook, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2002
## Record status
- **NPPES last updated:** September 29, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1023299393) · Data from the CMS NPPES public registry.