ALAN LI MD
NPI 1902474604
Internal Medicine - Sleep Medicine in Downers Grove, IL
About Alan Li Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
ALAN LI MD (NPI 1902474604) is an individual sleep medicine provider in Downers Grove, Illinois, licensed in Minnesota (79126) and active in the NPI registry since June 2021. He is enrolled in Medicare PECOS, is affiliated with Mayo Clinic Hospital Rochester, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 2
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Alan Li 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mayo Clinic Hospital Rochester
Acute Care Hospitals · Rochester, MNPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 60515 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.
DOWNERS GROVE, IL 60515
DOWNERS GROVE, IL 60515
DOWNERS GROVE, IL 60515
DOWNERS GROVE, IL 60515
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 Alan Li's NPI number?
The NPI number for Alan Li is 1902474604. It was assigned to this individual provider in the NPPES registry on June 17, 2021.
Where is Alan Li located?
Alan Li practices at 3815 Highland Ave, Downers Grove, IL 60515. The listed phone number is (630) 275-5900.
What is Alan Li's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Sleep Medicine, with taxonomy code 207RS0012X.
Is Alan Li enrolled in Medicare?
Yes. Alan Li 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.
Is Alan Li affiliated with any hospitals?
According to CMS data, Alan Li is affiliated with Mayo Clinic Hospital Rochester.
When was this NPI record last updated?
The NPPES record for Alan Li was last updated on June 20, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 55 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.
# Alan Li, MD · NPI 1902474604
Sleep Medicine physician in Downers Grove, Illinois. Individual provider, active in the CMS NPPES registry since June 17, 2021.
## Identity
- **NPI:** 1902474604 (Entity type: Individual)
- **Enumerated:** June 17, 2021
- **Primary specialty:** Internal Medicine - Sleep Medicine · taxonomy 207RS0012X
- **State license:** 79126 (Minnesota)
- **Sole proprietor:** No
## Practice location
- **Address:** 3815 HIGHLAND AVE, Downers Grove, IL 60515-1500
- **Phone:** (630) 275-5900
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** University Of Illinois College Of Med, class of 2021
## Record status
- **NPPES last updated:** June 20, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1902474604) · Data from the CMS NPPES public registry.