Dr. Len Michael Lee, DO
- Medicare services, 2024
- 516
- Medicare patients, 2024
- 527
- Part D claims, 2024
- 112
- Hospital affiliations
- 3
- Industry payments
- $257
- Practice address
- 1000 N Westmoreland Rd, Lake Forest, IL 60045
- Practice phone
- Call (847) 234-5600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northwestern Catherine Gratz Griffin Lake Forest Hospital
Lake Forest, Illinois
Find Dr. Lee's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Len Michael Lee is an emergency medicine physician in Lake Forest, Illinois
Dr. Lee practices at Northwestern Catherine Gratz Griffin Lake Forest Hospital in Lake Forest, Illinois.
Dr. Lee's NPI, 1598818395, was assigned on January 18, 2007. Dr. Lee graduated from Oklahoma State University College Of Osteopathic Medicine in 1990. Dr. Lee holds Illinois license 036089274.
- NPI
- 1598818395NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6800806118
- NPI enumeration date
- January 18, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (847) 234-5600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Len Michael Lee practices at Northwestern Catherine Gratz Griffin Lake Forest Hospital in Lake Forest, Illinois
Dr. Lee's primary practice is Northwestern Catherine Gratz Griffin Lake Forest Hospital, at 1000 N Westmoreland Rd, Lake Forest, IL 60045 in Lake County. The practice phone is (847) 234-5600.
- Northwestern Catherine Gratz Griffin Lake Forest Hospital1000 N Westmoreland Rd, Lake Forest, IL 60045 · Lake CountyPhone(847) 234-5600
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Len Michael Lee is affiliated with 4 sites of care and 3 medical groups
Dr. Lee's primary practice is Northwestern Catherine Gratz Griffin Lake Forest Hospital in Lake Forest, Illinois. Dr. Lee is also affiliated with Northwestern Medicine Catherine Gratz Griffin Lake Forest Hospital. The medical group on file is Northwestern Medical Faculty Foundation. Dmand AI also links Dr. Lee to 2 more hospitals and 2 medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Len Michael Lee's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lee practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Catherine Gratz Griffin Lake Forest Hospital | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Len Michael Lee is one of 2,385 emergency medicine physicians in Illinois
Emergency medicine is Dr. Lee's primary specialty in the NPI Registry, under taxonomy code 207P00000X. Dr. Lee is board certified in emergency medicine by the American Board of Emergency Medicine. Dr. Lee is licensed in Illinois.
Specialties and state licenses
- Emergency medicine, IllinoisPrimary
Emergency medicine physicians near Dr. Lee
Counts of emergency medicine physicians with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Len Michael Lee billed Medicare for 516 services in 2024
CMS data shows 516 Medicare services from Dr. Lee across 4 procedure codes in 2024, for 527 Medicare patients. Medicare paid $63,672 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Lee's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 4732024: 5169%
Dr. Lee compared with the Illinois median for emergency medicine physicians, 2024
- Dr. Lee
- Illinois median
- Medicare services
- 516vs 27488% above
- Medicare patients
- 527vs 27393% above
- Part D claims
- 17vs 4562% below
Medians across 2,281 emergency medicine physicians in Illinois with Dmand AI profiles that report each measure.
Dr. Lee's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Len Michael Lee treated 527 Medicare patients in 2024, average age 74
CMS counts 527 Medicare patients who saw Dr. Lee in 2024. The largest group is 65 to 74, with 180 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 2.17, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Lee's median patient age at 63, with 55% women.
Dr. Lee's Medicare patients by age, 2024
Dr. Lee's Medicare patients by sex, 2024
- Women30057%
- Men22743%
Chronic conditions among Dr. Lee's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis57%
- Ischemic heart disease44%
- Chronic kidney disease37%
- Diabetes37%
- Anxiety35%
- Mood disorders34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lee's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 63
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Len Michael Lee wrote 112 Medicare Part D claims in 2024
In 2024, Dr. Lee wrote 112 Medicare Part D claims for 81 patients. 91% of them were for generic drugs. CMS names the drug for 17 of them, across 1 drug with 11 or more claims each, at $73 in total drug cost. In 2023, CMS named 12 claims across 1 drug.
Dr. Lee's Part D claims by kind of drug, 2024
- Generic102 claims91%
- Brand-name and other10 claims9%
Dr. Lee's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Lee's Part D claims, 2024
- Opioids20%22 of 112 claims
- Antibiotics27%30 of 112 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 122024: 1742%
Drugs named by CMS: 1 in 2024, 1 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Len Michael Lee takes part in Medicare
Dr. Lee accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Len Michael Lee received $257 in industry payments from 2018 to 2019
CMS Open Payments shows 4 general payments to Dr. Lee from 4 drug and device companies from 2018 to 2019. Food and beverage make up the largest share, 100% of the total. Abbott Laboratories paid the most, $118.
General payments to Dr. Lee by program year, 2018 to 2019
Companies that paid Dr. Lee the most, 2018 to 2019
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Len Michael Lee graduated from Oklahoma State University College Of Osteopathic Medicine
Dr. Lee graduated from Oklahoma State University College Of Osteopathic Medicine in 1990.
- Medical school
- Board certified in emergency medicine
- Board certified in 1994 - 2026
- Board certified in 2015 - 2018
Source: Dmand AI Professional Profile Data
Sources for Dr. Len Michael Lee's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Len Michael Lee
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Len Michael Lee's NPI number?
Dr. Len Michael Lee's NPI number is 1598818395. It was assigned on January 18, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Len Michael Lee?
Dr. Len Michael Lee is an emergency medicine physician in Lake Forest, Illinois. The primary specialty in the NPI Registry is Emergency Medicine Physician (taxonomy code 207P00000X).
Where does Dr. Len Michael Lee practice?
Dr. Lee practices at 1000 N Westmoreland Rd, Lake Forest, IL 60045. Dr. Lee's primary practice is Northwestern Catherine Gratz Griffin Lake Forest Hospital in Lake Forest, Illinois. Dmand AI also links Dr. Lee to 2 hospitals and 2 medical groups.
What is Dr. Len Michael Lee's office phone number?
The practice phone on file for Dr. Lee is (847) 234-5600.
What is Dr. Len Michael Lee's medical license number?
Dr. Lee holds Illinois license 036089274.
Which hospitals is Dr. Len Michael Lee affiliated with?
Dr. Lee is affiliated with Northwestern Medicine Catherine Gratz Griffin Lake Forest Hospital. Dmand AI links Dr. Lee to 2 more hospitals.
What medical group is Dr. Len Michael Lee part of?
Dr. Lee is linked to Northwestern Medical Faculty Foundation. Dmand AI links Dr. Lee to 2 more medical groups.
Does Dr. Len Michael Lee accept Medicare?
Yes. CMS data shows Dr. Lee billed Medicare for 516 services in 2024, and Dr. Lee accepts Medicare assignment.
How many Medicare patients does Dr. Len Michael Lee see?
CMS counts 527 Medicare patients who saw Dr. Lee in 2024, with an average age of 74.
Is Dr. Len Michael Lee board certified?
Yes. Dr. Lee is board certified in emergency medicine by the American Board of Emergency Medicine.
Show 5 more questionsShow fewer questions
What services does Dr. Len Michael Lee bill to Medicare?
In 2024, Dr. Lee's most billed Medicare services were emergency department visit (99285), emergency department visit (99284) and critical care (99291).
Where did Dr. Len Michael Lee go to medical school?
Dr. Lee graduated from Oklahoma State University College Of Osteopathic Medicine in 1990.
What drugs does Dr. Len Michael Lee prescribe most?
In 2024 Medicare Part D data, Dr. Lee's most prescribed drugs by claims were Hydrocodone-Acetaminophen.
Has Dr. Len Michael Lee received payments from drug or device companies?
CMS Open Payments shows $257 in general payments to Dr. Lee from 4 companies from 2018 to 2019. The largest total came from Abbott Laboratories.
How long has Dr. Len Michael Lee been practicing?
Dr. Lee graduated from medical school in 1990, 36 years ago.
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