Alan Li, MD
Sleep Medicine (Internal Medicine) Physician · Downers Grove, IL
Alan Li, MD is a sleep medicine (internal medicine) physician with a practice address in Downers Grove, Illinois, and NPI 1902474604, issued on Jun 17, 2021. Check the license on the Illinois Department of Financial and Professional Regulation; the Medicare figures below come from public CMS files.
- Name
- Alan Li
- Credential
- MD
- Primary taxonomy
- Sleep Medicine (Internal Medicine) Physician 207RS0012X
- License numbers
- 79126 MN
2021022433 MO
Self-reported in NPPES; status is on the state search - Practice location
- 3815 Highland Ave, Downers Grove, IL 60515
- Phone
- (630) 275-5900
- Enumerated
- Jun 17, 2021
- Record last updated
- Jun 20, 2026
- Medicare enrollment
- Enrolled (PECOS I20250513002084); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 2021
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest sleep medicine (internal medicine) physician records → All 43 in Illinois → Look up another NPI →
Also registered at 3815 Highland Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sadiqa Abbas, M.D.Interventional Pain Medicine Physician1528010634
- Nicole Ahrens, CRNACertified Registered Nurse Anesthetist1578154340
- Aristides Alexander, M.D.Emergency Medicine Physician1881009082
- Yorleni Ambrosio, RN, CNSNeonatal Intensive Care Registered Nurse1720465065
- Manisa Baker, APNAcute Care Clinical Nurse Specialist1023479508
- Michelle BankheadSurgical Assistant1568921039
Verify Alan Li in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIllinois Department of Financial and Professional RegulationCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
80% fewer Medicare Part D claims than the average sleep medicine (internal medicine) physician in 2024
115 Medicare Part D claims for 21 beneficiaries, against an average of 585 among the 852 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Levetiracetam30 claims
- Atorvastatin Calcium23 claims
- Zonisamide13 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Mayo ClinicRochester, MN
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Alan Li among 43 sleep medicine (internal medicine) physician records in Illinois
Alan Li, MD is one of 43 sleep medicine (internal medicine) physician records with a practice address in Illinois. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 88% of them.
- NPI issued2021 · 88% of these records are older, 5% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2021 · median 2012 among the 30 with a school on file
- Record last updated2026 · 35% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RS0012X and a Illinois practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Sleep Medicine (Internal Medicine) Physician providers in Illinois
There are 43 sleep medicine (internal medicine) physician records in Illinois.
All 43 in Illinois → Every provider in Downers Grove → Sleep Medicine (Internal Medicine) Physician nationwide →
The 8 sleep medicine (internal medicine) physician records with the nearest ZIP codes
- Izayadeth Jennings, M.D.Lisle, IL 605321205285996
- Wojciech Ornowski, MDSouth Holland, IL 604731801887369
- Helen Martin, M.M.Orland Park, IL 604671750338216
- Richard CzumaPalos Heights, IL 604631295232064
- Robert Aronson, M.D.Olympia Fields, IL 604611598824039
- Philip Leung, M.D.Joliet, IL 604351881686715
- Syed Sayeeduddin, M.D.Joliet, IL 604351467717561
- Jonathan Warren, MDJoliet, IL 604351871519124
Common questions
What is Alan Li, MD's NPI number?
Alan Li, MD's National Provider Identifier (NPI) is 1902474604, issued on Jun 17, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Alan Li, MD located?
The NPPES record lists a practice address at 3815 Highland Ave, Downers Grove, IL, 60515. Phone: (630) 275-5900. Providers update this record themselves, so call before visiting.
How can I verify Alan Li, MD's license?
Search the Illinois Department of Financial and Professional Regulation at https://idfpr.illinois.gov/checklicense.html. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Alan Li, MD prescribe under Medicare Part D?
In 2024, Alan Li, MD had 115 Medicare Part D claims for 21 beneficiaries; the average among sleep medicine (internal medicine) physician prescribers was 585. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.