Dr. Michael Y. Lee, MD
- Medicare services, 2024
- 854
- Medicare patients, 2024
- 173
- Part D claims, 2024
- 2,373
- Hospital affiliations
- 2
- Industry payments
- $9,357
- Practice address
- 676 N St Clair St, Chicago, IL 60611
- Practice phone
- Call (312) 944-0688
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Internal Medicine Associates
Chicago, 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. Michael Y. Lee is an internist in Chicago, Illinois
Dr. Lee practices at Internal Medicine Associates in Chicago, Illinois.
Dr. Lee's NPI, 1942293451, was assigned on August 30, 2005. Dr. Lee graduated from Northwestern University Feinberg Medical School in 1996. Dr. Lee holds Illinois license 036100133.
- NPI
- 1942293451NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0042246480
- NPI enumeration date
- August 30, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (312) 944-0688
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 56
- Medical school graduation
- 1996
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Michael Y. Lee practices at Internal Medicine Associates in Chicago, Illinois
Dr. Lee's primary practice is Internal Medicine Associates, at 676 N St Clair St, Chicago, IL 60611 in Cook County. The practice phone is (312) 944-0688.
- Internal Medicine Associates676 N St Clair St, Chicago, IL 60611 · Cook CountyPhone(312) 944-0688
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Michael Y. Lee is affiliated with 5 sites of care and 2 medical groups
Dr. Lee's primary practice is Internal Medicine Associates in Chicago, Illinois. Dr. Lee is also affiliated with Northwestern Memorial Hospital. The medical group on file is Internal Medicine Associates. Dmand AI also links Dr. Lee to 1 more hospital, 2 group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Michael Y. Lee's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lee practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Internal Medicine Associates | Available with a free account |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Michael Y. Lee is one of 5,652 internists in Illinois
Internal medicine is Dr. Lee's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Lee is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Lee
Counts of internists 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. Michael Y. Lee billed Medicare for 854 services in 2024
CMS data shows 854 Medicare services from Dr. Lee across 17 procedure codes in 2024, for 173 Medicare patients. Medicare paid $52,724 for them. Every service was in an office.
Dr. Lee's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 4322024: 433No change
- Office and hospital visits
- 2023: 2592024: 28811%
- Tests and treatments
- 2023: 822024: 9516%
- Lab and pathology
- 2023: 402024: 385%
Dr. Lee compared with the Illinois median for internists, 2024
- Dr. Lee
- Illinois median
- Medicare services
- 854vs 56651% above
- Medicare patients
- 173vs 20817% below
- Part D claims
- 1,914vs 2846.7 times
Medians across 5,192 internists 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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Lee and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Michael Y. Lee treated 173 Medicare patients in 2024, average age 75
CMS counts 173 Medicare patients who saw Dr. Lee in 2024. The largest group is 65 to 74, with 79 patients. 75% of them have high cholesterol, and 65% have high blood pressure. 7% are also on Medicaid. Their average risk score is 0.78, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Lee's median patient age at 63, with 35% women.
Dr. Lee's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Lee's Medicare patients by sex, 2024
- Women6940%
- Men10460%
Chronic conditions among Dr. Lee's Medicare patients, 2024
- High cholesterol75%
- High blood pressure65%
- Arthritis24%
- Cancer21%
- Anxiety16%
- Atrial fibrillation15%
- Diabetes15%
- Ischemic heart disease14%
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
- Women35%
- Men64%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Michael Y. Lee wrote 2,373 Medicare Part D claims in 2024
In 2024, Dr. Lee wrote 2,373 Medicare Part D claims for 255 patients. 90% of them were for generic drugs. CMS names the drug for 1,914 of them, across 42 drugs with 11 or more claims each, at $152,149 in total drug cost. In 2023, CMS named 1,973 claims across 44 drugs.
Dr. Lee's Part D claims by kind of drug, 2024
- Generic2,144 claims90%
- Brand-name and other229 claims10%
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
- Antibiotics2%38 of 2,373 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: 1,9732024: 1,9143%
Drugs named by CMS: 42 in 2024, 44 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. Michael Y. 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. Michael Y. Lee received $9,357 in industry payments from 2016 to 2025
CMS Open Payments shows 451 general payments to Dr. Lee from 40 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Pfizer Inc. paid the most, $1,647.
General payments to Dr. Lee by program year, 2016 to 2025
General payments to Dr. Lee by kind, 2016 to 2025
- Food and beverage$9,29799%
- Education$601%
Companies that paid Dr. Lee the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Michael Y. Lee graduated from Northwestern University Feinberg Medical School
Dr. Lee graduated from Northwestern University Feinberg Medical School in 1996.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Michael Y. 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 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. Michael Y. 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. Michael Y. Lee's NPI number?
Dr. Michael Y. Lee's NPI number is 1942293451. It was assigned on August 30, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Michael Y. Lee?
Dr. Michael Y. Lee is an internist in Chicago, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Michael Y. Lee practice?
Dr. Lee practices at 676 N St Clair St, Chicago, IL 60611. Dr. Lee's primary practice is Internal Medicine Associates in Chicago, Illinois. Dmand AI also links Dr. Lee to 1 hospital, 2 group practices and clinics and 1 medical group.
What is Dr. Michael Y. Lee's office phone number?
The practice phone on file for Dr. Lee is (312) 944-0688.
What is Dr. Michael Y. Lee's medical license number?
Dr. Lee holds Illinois license 036100133.
Which hospitals is Dr. Michael Y. Lee affiliated with?
Dr. Lee is affiliated with Northwestern Memorial Hospital. Dmand AI links Dr. Lee to 1 more hospital.
What medical group is Dr. Michael Y. Lee part of?
Dr. Lee is linked to Internal Medicine Associates. Dmand AI links Dr. Lee to 1 more medical group.
Does Dr. Michael Y. Lee accept Medicare?
Yes. CMS data shows Dr. Lee billed Medicare for 854 services in 2024, and Dr. Lee accepts Medicare assignment.
How many Medicare patients does Dr. Michael Y. Lee see?
CMS counts 173 Medicare patients who saw Dr. Lee in 2024, with an average age of 75.
What services does Dr. Michael Y. Lee bill to Medicare?
In 2024, Dr. Lee's most billed Medicare services were office visit, established patient (99213), medicare service (G0442) and office visit, established patient (99214).
Show 4 more questionsShow fewer questions
Where did Dr. Michael Y. Lee go to medical school?
Dr. Lee graduated from Northwestern University Feinberg Medical School in 1996.
What drugs does Dr. Michael Y. Lee prescribe most?
In 2024 Medicare Part D data, Dr. Lee's most prescribed drugs by claims were Rosuvastatin Calcium, Atorvastatin Calcium and Amlodipine Besylate.
Has Dr. Michael Y. Lee received payments from drug or device companies?
CMS Open Payments shows $9,357 in general payments to Dr. Lee from 40 companies from 2016 to 2025. The largest total came from Pfizer Inc.
How long has Dr. Michael Y. Lee been practicing?
Dr. Lee graduated from medical school in 1996, 30 years ago.
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