About
NICHOLAS MAASSEN is an orthopedic surgery located at 5841 S MARYLAND AVE in CHICAGO, IL.
Nicholas Maassen is one of 396 orthopedic providers listed in CHICAGO, IL on AdvOrtho.
Practice at a glance
Nicholas Maassen's most frequently billed Medicare service in 2024 was aspiration and/or injection of fluid from large joint for 46 Medicare patients.
Distinct procedures
1
Medicare patients
52
busiest single service
Care setting
54% office
mostly outpatient
Most-performed procedures, 2024
Aspiration and/or injection of fluid from large joint
101
46 patients · near the state median of 118
Training and practice
Nicholas Maassen has been in practice since 2008, after graduating from University of Wisconsin School of Medicine.
- Practices with The University of Chicago Medical Center (907 clinicians)
- Affiliated with Ingalls Memorial Hospital and The University of Chicago Medical Center
Registry record
- Licensed in Illinois
- Practices within a group or organization
Where this comes from
Procedure volumes:CMS Medicare Physician & Other Practitioners, 2024. Fee-for-service claims only, so they exclude privately insured, Medicare Advantage and pediatric patients - volume is not comparable across practices with different patient mixes. These are billing records, not outcomes.
Training and practice: CMS Doctors and Clinicians list. A graduation year is when training finished, not years of orthopedic experience or a board certification. Affiliations come from Medicare enrollment and may be incomplete.
Registry details: NPPES. Subspecialties are self-reported at registration, not a board certification.
Office Information
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Profile information is sourced from the public CMS NPI Registry. Contact the office directly to confirm current availability and insurance acceptance. Providers can update this profile to reflect their current practice.
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