Dr. Mark Chwajol, MD
- Medicare services, 2024
- 65
- Medicare patients, 2024
- 88
- Part D claims, 2024
- 23
- Hospital affiliations
- 3
- Industry payments
- $6,767
- Practice address
- 5666 East State Street, Rockford, IL 61108
- Practice phone
- Call (815) 226-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Chwajol'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. Mark Chwajol is a neurosurgeon in Rockford, Illinois
Dr. Chwajol practices at OSF Saint Anthony Medical Center in Rockford, Illinois, part of OSF HealthCare System.
Dr. Chwajol's NPI, 1356575690, was assigned on May 13, 2009. Dr. Chwajol graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2010. Dr. Chwajol holds Illinois license 036.123878.
- NPI
- 1356575690NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9032257407
- NPI enumeration date
- May 13, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (815) 226-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark Chwajol practices at OSF Saint Anthony Medical Center in Rockford, Illinois
Dr. Chwajol's primary practice is OSF Saint Anthony Medical Center, at 5666 East State Street, Rockford, IL 61108 in Winnebago County. The practice phone is (815) 226-2000.
- OSF Saint Anthony Medical Center5666 East State Street, Rockford, IL 61108 · Winnebago CountyPhone(815) 226-2000
Source: Dmand AI Affiliation Data
Dr. Mark Chwajol is affiliated with 3 sites of care and 3 medical groups
Dr. Chwajol's primary practice is OSF Saint Anthony Medical Center in Rockford, Illinois, part of OSF HealthCare System. Dr. Chwajol is also affiliated with University of Illinois Hospital. The medical group on file is OSF Multi-Specialty Group. Dmand AI also links Dr. Chwajol to 1 more hospital and 2 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark Chwajol's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Chwajol practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| OSF Saint Anthony Medical Center | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dmand AI maps EHR vendors, IT decision makers and buying committees across OSF HealthCare System and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Mark Chwajol is one of 303 neurosurgeons in Illinois
Neurological surgery is Dr. Chwajol's primary specialty in the NPI Registry, under taxonomy code 207T00000X. Dr. Chwajol is licensed in Illinois.
Specialties and state licenses
- Neurological surgery, IllinoisPrimary
Neurosurgeons near Dr. Chwajol
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. Mark Chwajol billed Medicare for 65 services in 2024
CMS data shows 65 Medicare services from Dr. Chwajol across 3 procedure codes in 2024, all of them office visits, for 88 Medicare patients. Medicare paid $4,779 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Chwajol's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 162024: 65306%
Dr. Chwajol compared with the Illinois median for neurosurgeons, 2024
- Dr. Chwajol
- Illinois median
- Medicare services
- 65vs 18465% below
- Medicare patients
- 88vs 14238% below
Medians across 252 neurosurgeons in Illinois with Dmand AI profiles that report each measure.
Dr. Chwajol'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. Chwajol and other neurosurgeons in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Chwajol treated 88 Medicare patients in 2024, average age 72
CMS counts 88 Medicare patients who saw Dr. Chwajol in 2024. The largest group is 65 to 74, with 37 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 23% are also on Medicaid. Their average risk score is 1.37, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Chwajol's median patient age at 71, with 45% women.
Dr. Chwajol's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Chwajol's Medicare patients by sex, 2024
- Women3843%
- Men5057%
Chronic conditions among Dr. Chwajol's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis68%
- Mood disorders57%
- Depression43%
- Diabetes43%
- Anxiety39%
- Chronic kidney disease39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Chwajol's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women45%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Mark Chwajol wrote 23 Medicare Part D claims in 2024
In 2024, Dr. Chwajol wrote 23 Medicare Part D claims. 100% of them were for generic drugs.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Mark Chwajol ranks in the 40th percentile for spinal fusion in Medicare
Dr. Chwajol accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Chwajol as offering telehealth. CMS counts 24 procedures of spinal fusion by Dr. Chwajol, more than 40% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Chwajol ranks in Medicare procedure volume
- Spinal fusion
- 40th percentile24 procedures
- Laminectomy or laminotomy (partial removal of spine bones)
- 37th percentile12 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Mark Chwajol received $6,767 in industry payments from 2016 to 2025
CMS Open Payments shows 41 general payments to Dr. Chwajol from 19 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 29% of the total. Alphatec Spine, Inc paid the most, $2,108.
General payments to Dr. Chwajol by program year, 2016 to 2025
General payments to Dr. Chwajol by kind, 2016 to 2025
- Food and beverage$1,96529%
- Consulting fees$1,66825%
- Travel and lodging$1,63424%
- Honoraria$1,50022%
Companies that paid Dr. Chwajol 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. Mark Chwajol graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb)
Dr. Chwajol graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2010.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Chwajol'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 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 (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)Doctors and Clinicians Utilization Data (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. Mark Chwajol
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. Mark Chwajol's NPI number?
Dr. Mark Chwajol's NPI number is 1356575690. It was assigned on May 13, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Chwajol?
Dr. Mark Chwajol is a neurosurgeon in Rockford, Illinois. The primary specialty in the NPI Registry is Neurological Surgery Physician (taxonomy code 207T00000X).
Where does Dr. Mark Chwajol practice?
Dr. Chwajol practices at 5666 East State Street, Rockford, IL 61108. Dr. Chwajol's primary practice is OSF Saint Anthony Medical Center in Rockford, Illinois, part of OSF HealthCare System. Dmand AI also links Dr. Chwajol to 1 hospital and 2 medical groups.
What is Dr. Mark Chwajol's office phone number?
The practice phone on file for Dr. Chwajol is (815) 226-2000.
What is Dr. Mark Chwajol's medical license number?
Dr. Chwajol holds Illinois license 036.123878.
Which hospitals is Dr. Mark Chwajol affiliated with?
Dr. Chwajol practices at OSF Saint Anthony Medical Center in Rockford, Illinois. Dr. Chwajol is also affiliated with University of Illinois Hospital. Dmand AI links Dr. Chwajol to 1 more hospital.
What medical group is Dr. Mark Chwajol part of?
Dr. Chwajol is linked to OSF Multi-Specialty Group. Dmand AI links Dr. Chwajol to 2 more medical groups.
Does Dr. Mark Chwajol accept Medicare?
Yes. CMS data shows Dr. Chwajol billed Medicare for 65 services in 2024, and Dr. Chwajol accepts Medicare assignment.
Does Dr. Mark Chwajol offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Chwajol as offering telehealth services.
How many Medicare patients does Dr. Mark Chwajol see?
CMS counts 88 Medicare patients who saw Dr. Chwajol in 2024, with an average age of 72.
Show 4 more questionsShow fewer questions
What services does Dr. Mark Chwajol bill to Medicare?
In 2024, Dr. Chwajol's most billed Medicare services were office visit, new patient (99204), office visit, established patient (99213) and office visit, established patient (99214).
Where did Dr. Mark Chwajol go to medical school?
Dr. Chwajol graduated from University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) in 2010.
Has Dr. Mark Chwajol received payments from drug or device companies?
CMS Open Payments shows $6,767 in general payments to Dr. Chwajol from 19 companies from 2016 to 2025. The largest total came from Alphatec Spine, Inc.
How long has Dr. Mark Chwajol been practicing?
Dr. Chwajol graduated from medical school in 2010, 16 years ago.
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