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Emergency Medicine

Len M. Lee, DO

Works at hospitals in Lake Forest, IL · Chicago, IL · New Lenox, IL · Illinois

Summary

Len M. Lee, DO (Emergency Medicine) is listed by Medicare at 3 hospitals in Lake Forest, IL, Chicago, IL and New Lenox, IL. NPI 1598818395. Medicare data says the clinician accepts Medicare assignment. Source: CMS Facility Affiliation Data, updated 2026-10-02.

From official Medicare data

This page shows what Medicare's official clinician data says about Len M. Lee, joined by NPI number (data updated 2026-10-02). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

At a glance

Emergency MedicinePrimary specialty
YesAccepts Medicare assignment
36Years since medical school (graduated 1990)
Oklahoma State University College Of Osteopathic MedicineMedical school
MaleGender (as listed)
Northwestern Medical Faculty FoundationGroup practice

Quick answers

Which hospitals does Len M. Lee work at?
Medicare's official clinician data lists Len M. Lee at 3 hospitals: Northwestern Lake Forest Hospital, Northwestern Memorial Hospital and Silver Cross Hospital and Medical Centers. This is where the clinician works or has privileges; call the hospital to confirm.
Where does Len M. Lee see patients?
Medicare's clinician data lists 1 practice location in Lake Forest, IL. Call before your visit to confirm the address.
What is Len M. Lee's specialty?
Medicare lists Emergency Medicine as the primary specialty.
Does Len M. Lee accept Medicare assignment?
Yes. Medicare's clinician data says Len M. Lee accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
What is the phone number for Len M. Lee?
(847) 234-5600, as listed in official Medicare / NPI Registry data.
What is Len M. Lee's NPI number?
1598818395. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Hospitals where Len M. Lee works

Medicare's Facility Affiliation Data lists Len M. Lee at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.

Practice locations

Addresses where Len M. Lee is enrolled with Medicare (CMS data updated 2026-10-02).

Group practices

Medicare enrollment lists Len M. Lee as a member of this group (CMS data updated 2026-10-02).

  • Northwestern Medical Faculty Foundation4,503 clinicians in the group

Specialties

Find other Emergency Medicine doctors in Illinois →

Other emergency medicine doctors in Lake Forest

Clinicians with the same Medicare primary specialty in Lake Forest, IL — not a recommendation.

All emergency medicine doctors in Lake Forest →

Clinician information

CredentialDO
Medical schoolOklahoma State University College Of Osteopathic Medicine
Graduation year1990
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1598818395
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
  2. National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians