DR. IVAN GUAN MD
NPI 1649850348
Psychiatry & Neurology - Neurology in Chicago, IL
About Dr. Ivan Guan Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. IVAN GUAN MD (NPI 1649850348) is an individual neurology provider in Chicago, Illinois, licensed in Illinois (036.175387) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS, is affiliated with The University Of Chicago Medical Center, and maintains a secondary practice location in New York.
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. Ivan Guan Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Ivan Guan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chicago, IL 60637
- Reassigned Medicare billing, Illinois enrollment
- 1,905 clinicians in this Medicare group
Chicago, IL 60637
- Reassigned Medicare billing, Illinois enrollment
- 2,237 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
The University Of Chicago Medical Center
Acute Care Hospitals · Chicago, ILIngalls Memorial Hospital
Acute Care Hospitals · Harvey, ILPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60637 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 3
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Ivan Guan's NPI number?
The NPI number for Ivan Guan is 1649850348. It was assigned to this individual provider in the NPPES registry on April 8, 2021.
Where is Ivan Guan located?
Ivan Guan practices at 5841 S Maryland Ave # 2030, Chicago, IL 60637. The listed phone number is (773) 702-6222.
What is Ivan Guan's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology, with taxonomy code 2084N0400X.
Is Ivan Guan enrolled in Medicare?
Yes. Ivan Guan is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Ivan Guan's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ivan Guan reassigns Medicare benefits to 2 organizations: The University Of Chicago Medical Center (Chicago, IL) and University Of Chicago (Chicago, 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 Ivan Guan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Ivan Guan affiliated with any hospitals?
According to CMS data, Ivan Guan is affiliated with The University Of Chicago Medical Center and Ingalls Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Ivan Guan was last updated on June 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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. Ivan Guan, MD · NPI 1649850348
Neurology physician in Chicago, Illinois. Individual provider, active in the CMS NPPES registry since April 8, 2021.
## Identity
- **NPI:** 1649850348 (Entity type: Individual)
- **Enumerated:** April 8, 2021
- **Primary specialty:** Psychiatry & Neurology - Neurology · taxonomy 2084N0400X
- **State license:** 036.175387 (Illinois)
- **Sole proprietor:** No
## Practice location
- **Address:** 5841 S MARYLAND AVE # 2030, Chicago, IL 60637-1443
- **Phone:** (773) 702-6222
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **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): The University Of Chicago Medical Center (NPI 1033218128, Chicago, IL); University Of Chicago (NPI 1821048786, Chicago, IL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2021
## Record status
- **NPPES last updated:** June 12, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1649850348) · Data from the CMS NPPES public registry.