DrainageHydrocephalus, Normal PressurePostural Balance
Dr. Maciej S. Lesniak, MD
NPI1326103151PAC ID1557267267
- Medicare services, 2024
- 21
- Medicare patients, 2024
- 37
- Publications
- 198
- MIPS score, 2024
- 95
- Hospital affiliations
- 1
- Practice address
- 675 N Saint Clair St Ste 19-100 Suite 19-100, Chicago, IL 60611
- Practice phone
- Call (312) 664-3278
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northwestern Medical Group
Multi-specialty group site · Chicago, Illinois
Find Dr. Lesniak's professional email, personal email and mobile number
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Dr. Maciej S. Lesniak is a neurosurgeon in Chicago, Illinois
Dr. Lesniak practices at Northwestern Medical Group in Chicago, Illinois.
Dr. Lesniak's NPI, 1326103151, was assigned on December 22, 2006. Dr. Lesniak graduated from Johns Hopkins University School of Medicine in 1996. Dr. Lesniak holds Illinois license 036108469.
NPI and contact details
- NPI
- 1326103151NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1557267267
- NPI enumeration date
- December 22, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (312) 664-3278
- 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 Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Maciej S. Lesniak practices at Northwestern Medical Group in Chicago, Illinois
Dr. Lesniak's primary practice is Northwestern Medical Group, at 675 N Saint Clair St Ste 19-100 Suite 19-100, Chicago, IL 60611. The practice phone is (312) 664-3278.
- Northwestern Medical Group675 N Saint Clair St Ste 19-100 Suite 19-100, Chicago, IL 60611Phone(312) 664-3278
Source: Dmand AI Affiliation Data
Dr. Maciej S. Lesniak is affiliated with 2 sites of care and 1 medical group
Dr. Lesniak's primary practice is Northwestern Medical Group in Chicago, Illinois. Dr. Lesniak is also affiliated with Northwestern Memorial Hospital. The medical group on file is Northwestern Medical Faculty Foundation.
Northwestern Medical GroupPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Maciej S. Lesniak's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Lesniak practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Medical Group | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Maciej S. Lesniak is one of 303 neurosurgeons in Illinois
Neurological surgery is Dr. Lesniak's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dr. Lesniak is licensed in Illinois.
Specialties and state licenses
- Neurological surgery, IllinoisPrimary
Neurosurgeons near Dr. Lesniak
Counts of neurosurgeons 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. Maciej S. Lesniak billed Medicare for 21 services in 2024
CMS data shows 21 Medicare services from Dr. Lesniak across 1 procedure code in 2024, all of them office visits, for 37 Medicare patients. Medicare paid $969 for them. Every service was in an office.
Medicare services, 202421
Medicare patients37
Paid by Medicare$969
Procedure codes1
Dr. Lesniak's Medicare services by type, 2021 to 2024
- 2021
- 2024
- Office and hospital visits
- 2021: 422024: 2150%
Dr. Lesniak compared with the Illinois median for neurosurgeons, 2024
- Dr. Lesniak
- Illinois median
- Medicare services
- 21vs 18489% below
- Medicare patients
- 37vs 14274% below
Medians across 252 neurosurgeons in Illinois with Dmand AI profiles that report each measure.
Dr. Lesniak'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. Lesniak and other neurosurgeons in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Maciej S. Lesniak treated 37 Medicare patients in 2024, average age 72
CMS counts 37 Medicare patients who saw Dr. Lesniak in 2024. The largest group is 65 to 74, with 15 patients. 75% of them have high cholesterol, and 65% have high blood pressure. Their average risk score is 1.30, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Lesniak's median patient age at 70, with 78% women.
Medicare patients, 202437
Average age72
Average risk score1.30
Dr. Lesniak's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Lesniak's Medicare patients, 2024
- High cholesterol75%
- High blood pressure65%
- Arthritis46%
- Anxiety30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Lesniak's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women78%
- Men22%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Maciej S. Lesniak scored 95 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 95 out of 100 for Dr. Lesniak for performance year 2024, reported through an alternative payment model (APM). Dr. Lesniak accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Lesniak as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Lesniak's MIPS scores, performance year 2024
- 95of 100Final score
- 83of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Maciej S. Lesniak has 198 publications on record
Dmand AI links 198 papers to Dr. Lesniak, published from 2010 to 2025. 2019 was the busiest year, with 17. The most frequent topics are Brain Neoplasms, Cell Line, Tumor and Glioblastoma. Dr. Lesniak has published most often in J Neurooncol. Dr. Lesniak's most frequent co-authors are Yu Han, MD, Jawad Fares, MD, MS and Rimas Vincas Lukas, MD.
Papers198
Years published2010 to 2025
Dr. Lesniak's papers by year, 2016 to 2025
Topics Dr. Lesniak writes about most
- Brain Neoplasms
- Cell Line, Tumor
- Glioblastoma
- Glioma
- Disease Models, Animal
- Tumor Microenvironment
- Neural Stem Cells
- Xenograft Model Antitumor Assays
Dr. Lesniak's most frequent co-authors
Recent publications by Dr. Lesniak
N Am Spine Soc J
See who Dr. Lesniak researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Lesniak works with, so you can find a warm path to the right neurosurgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Maciej S. Lesniak received $20 in industry payments in 2025
CMS Open Payments shows 1 general payment to Dr. Lesniak from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. DePuy Synthes Sales Inc. paid the most, $20.
Companies that paid Dr. Lesniak the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Maciej S. Lesniak graduated from Johns Hopkins University School of Medicine
Dr. Lesniak graduated from Johns Hopkins University School of Medicine in 1996.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Maciej S. Lesniak'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Maciej S. Lesniak
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. Maciej S. Lesniak's NPI number?
Dr. Maciej S. Lesniak's NPI number is 1326103151. It was assigned on December 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Maciej S. Lesniak?
Dr. Maciej S. Lesniak is a neurosurgeon in Chicago, Illinois. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. Maciej S. Lesniak practice?
Dr. Lesniak practices at 675 N Saint Clair St Ste 19-100 Suite 19-100, Chicago, IL 60611. Dr. Lesniak's primary practice is Northwestern Medical Group in Chicago, Illinois.
What is Dr. Maciej S. Lesniak's office phone number?
The practice phone on file for Dr. Lesniak is (312) 664-3278.
What is Dr. Maciej S. Lesniak's medical license number?
Dr. Lesniak holds Illinois license 036108469.
Which hospitals is Dr. Maciej S. Lesniak affiliated with?
Dr. Lesniak is affiliated with Northwestern Memorial Hospital.
What medical group is Dr. Maciej S. Lesniak part of?
Dr. Lesniak is linked to Northwestern Medical Faculty Foundation.
Does Dr. Maciej S. Lesniak accept Medicare?
Yes. CMS data shows Dr. Lesniak billed Medicare for 21 services in 2024, and Dr. Lesniak accepts Medicare assignment.
Does Dr. Maciej S. Lesniak offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Lesniak as offering telehealth services.
What is Dr. Maciej S. Lesniak's MIPS score?
Dr. Lesniak's MIPS final score for performance year 2024 is 95 out of 100, reported through an alternative payment model (APM).
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. Maciej S. Lesniak see?
CMS counts 37 Medicare patients who saw Dr. Lesniak in 2024, with an average age of 72.
What services does Dr. Maciej S. Lesniak bill to Medicare?
In 2024, Dr. Lesniak's most billed Medicare services were office visit, established patient (99212).
Where did Dr. Maciej S. Lesniak go to medical school?
Dr. Lesniak graduated from Johns Hopkins University School of Medicine in 1996.
Has Dr. Maciej S. Lesniak received payments from drug or device companies?
CMS Open Payments shows $20 in general payments to Dr. Lesniak from 1 company from 2025 to 2025. The largest total came from DePuy Synthes Sales Inc.
How long has Dr. Maciej S. Lesniak been practicing?
Dr. Lesniak graduated from medical school in 1996, 30 years ago.
Does Dr. Maciej S. Lesniak do research?
Dmand AI links 198 publications to Dr. Lesniak, published from 2010 to 2025.
Who does Dr. Maciej S. Lesniak publish with?
Dr. Lesniak's most frequent co-authors are Yu Han, MD (45 shared papers), Jawad Fares, MD, MS (19 shared papers) and Rimas Vincas Lukas, MD (18 shared papers).
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