OSCAR ARTURO RIVAS CHICAS M.D.
NPI 1417289570
Internal Medicine - Gastroenterology in Chicago, IL
About Oscar Arturo Rivas Chicas M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
OSCAR ARTURO RIVAS CHICAS M.D. (NPI 1417289570) is an individual gastroenterology provider in Chicago, Illinois, licensed in Illinois (036-125090) and active in the NPI registry since January 2010. He is enrolled in Medicare PECOS, is affiliated with John H Stroger Jr Hospital, and is a graduate of Other (2004).
NPPES Registry Identity
Specialties & Licenses 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
Oscar Arturo Rivas Chicas M.d. 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 Oscar Rivas Chicas reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Chicago, IL 60612
- Reassigned Medicare billing, Illinois enrollment
- 1,047 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 5
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.
John H Stroger Jr Hospital
Acute Care Hospitals · Chicago, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60612 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.
CHICAGO, IL 60612
CHICAGO, IL 60612
CHICAGO, IL 60612
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 Oscar Rivas Chicas's NPI number?
The NPI number for Oscar Rivas Chicas is 1417289570. It was assigned to this individual provider in the NPPES registry on January 31, 2010.
Where is Oscar Rivas Chicas located?
Oscar Rivas Chicas practices at 1900 W Polk St 15th Floor, Chicago, IL 60612. The listed phone number is (312) 504-3250.
What is Oscar Rivas Chicas's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Oscar Rivas Chicas enrolled in Medicare?
Yes. Oscar Rivas Chicas 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 Oscar Rivas Chicas's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Oscar Rivas Chicas reassigns Medicare benefits to Cook County (Chicago, IL). 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 Oscar Rivas Chicas's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Oscar Rivas Chicas affiliated with any hospitals?
According to CMS data, Oscar Rivas Chicas is affiliated with John H Stroger Jr Hospital.
When was this NPI record last updated?
The NPPES record for Oscar Rivas Chicas was last updated on April 29, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Oscar Arturo Rivas Chicas, M.D. · NPI 1417289570
Gastroenterology physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since January 31, 2010.
## Identity
- **NPI:** 1417289570 (Entity type: Individual)
- **Enumerated:** January 31, 2010
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 036-125090 (Illinois)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 1900 W POLK ST, 15TH FLOOR, Chicago, IL 60612-3723
- **Phone:** (312) 504-3250
## 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:** Cook County (NPI 1912063439, Chicago, IL), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2004
## Record status
- **NPPES last updated:** April 29, 2021
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Source: [NPI Profile](https://npiprofile.com/npi/1417289570) · Data from the CMS NPPES public registry.