Active NPI 1477718302 Individual Practitioner Male Practitioner

Nicholas Maassen

Orthopaedic Surgery • Chicago, IL

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Nicholas Maassen is a certified Orthopaedic Surgery practicing in Chicago, IL. With approximately 18 years of clinical experience since graduating from University Of Wisconsin School Of Medicine in 2008, Nicholas Maassen delivers high-quality medical care to the local community at 5841 S MARYLAND AVE.

Nicholas Maassen maintains professional affiliations with University Of Chicago, The University Of Chicago Medical Center and accepts Medicare assignment.

Frequently performed procedures and clinical services include injection, triamcinolone acetonide, not otherwise specified, 10 mg, established patient outpatient office visit, aspiration and/or injection of fluid from large joint. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

5841 S Maryland Ave

Chicago, IL 606371443

Telephone 8888240200

Associated Practice Facility / Clinic

🏢 University Of Chicago Facility NPI 1821048786

Medicare Profile & Education

Medical School

University Of Wisconsin School Of Medicine

Graduation Year

2008

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Orthopaedic Surgery in Chicago, IL

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

18 Yrs -3.6 yrs vs City Avg

City Avg: 21.6 Yrs

State Avg: 27.0 Yrs

Regional Practice Density

290 Specialists

Practicing in Chicago, IL (1064 Statewide)

Telehealth Adoption Rate

5.5% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

76.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Maassen (18 Years) 18 Yrs

Chicago Specialty Average (21.6 Years) 21.6 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	113	35	$7.00	$0.98
99213 Established patient office or other outpatient visit, typically 15 minutes	67	43	$299.10	$98.66
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	65	52	$371.88	$106.17
99213 Established patient office or other outpatient visit, typically 15 minutes	62	51	$256.98	$72.16
20610 Aspiration and/or injection of fluid from large joint	59	46	$683.96	$51.17
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	57	47	$437.84	$136.20
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	44	44	$419.00	$91.44
20610 Aspiration and/or injection of fluid from large joint	42	33	$510.17	$78.95
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	31	31	$607.06	$148.07
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	20	20	$445.85	$122.55
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$689.55	$183.79

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	93	61	$265.47	$70.46
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	86	25	$7.00	$1.04
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	58	48	$408.09	$103.82
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	51	51	$577.14	$143.23
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	42	35	$423.88	$135.71
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	37	37	$410.24	$89.92
99213 Established patient office or other outpatient visit, typically 15 minutes	37	27	$290.11	$96.06
20610 Aspiration and/or injection of fluid from large joint	30	25	$494.87	$71.65
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	27	27	$663.33	$168.20
20610 Aspiration and/or injection of fluid from large joint	25	24	$683.48	$53.09
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	20	20	$436.10	$120.81

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	105	66	$303.95	$72.04
99213 Established patient office or other outpatient visit, typically 15 minutes	51	38	$279.82	$96.25
20610 Aspiration and/or injection of fluid from large joint	40	34	$576.17	$50.63
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	38	38	$386.79	$91.46
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	33	19	$7.00	$1.15
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	26	26	$417.15	$118.74
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	22	18	$412.91	$137.02
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	20	20	$463.90	$104.70
20610 Aspiration and/or injection of fluid from large joint	18	16	$455.81	$70.78
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	13	13	$560.00	$146.41

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	86	51	$238.56	$72.42
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	43	43	$373.33	$90.64
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	42	14	$7.00	$1.28
99213 Established patient office or other outpatient visit, typically 15 minutes	36	24	$268.81	$97.92
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	25	25	$406.52	$121.24
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	23	19	$395.48	$138.80
20610 Aspiration and/or injection of fluid from large joint	17	17	$550.06	$51.66
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	16	16	$324.69	$106.74
20610 Aspiration and/or injection of fluid from large joint	14	13	$424.71	$71.33

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	22	20	$186.09	$113.13
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	13	13	$272.23	$114.21
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	13	13	$359.01	$83.47

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	134	94	$183.00	$51.64
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	38	38	$273.00	$77.44
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	36	34	$270.00	$79.45
73030 X-ray of shoulder, minimum of 2 views	23	18	$25.00	$9.66
20610 Aspiration and/or injection of fluid from large joint	23	21	$172.96	$50.87
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	12	12	$415.00	$122.49

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	171	112	$183.00	$49.51
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	87	73	$270.00	$77.01
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	44	44	$273.00	$75.10
20610 Aspiration and/or injection of fluid from large joint	36	30	$153.00	$46.25
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	33	33	$415.00	$127.13
73030 X-ray of shoulder, minimum of 2 views	15	12	$25.00	$9.39

Medical Specialties & State Licenses

Orthopaedic Surgery Primary Specialty

NUCC Taxonomy Code: 207X00000X

State License IL 036152536

An orthopaedic surgeon is trained in the preservation, investigation and restoration of the form and function of the extremities, spine and associated structures by medical, surgical and physical means. An orthopaedic surgeon is involved with the care of patients whose musculoskeletal problems include congenital deformities, trauma, infections, tumors, metabolic disturbances of the musculoskeletal system, deformities, injuries and degenerative diseases of the spine, hands, feet, knee, hip, shoulder and elbow in children and adults. An orthopaedic surgeon is also concerned with primary and secondary muscular problems and the effects of central or peripheral nervous system lesions of the musculoskeletal system.

Hospital & Practice Group Affiliations

The University Of Chicago Medical Center

5841 S Maryland Ave, Chicago, IL 606371443

Phone: 7737021000

University Of Chicago

5841 S Maryland Ave, Chicago, IL 606371443

Phone: 8888240200

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

40 Associated Practitioners

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Internal Medicine

NPI 1003078049

Peleg Horowitz

Neurological Surgery

NPI 1003088279

Sandeep Gurbuxani

Pathology - Hematology

NPI 1003093535

Dr. Nathan Nowalk , MD

Internal Medicine - Pulmonary Disease

NPI 1003298720

Doctor of Medicine (M.D.)

Maria Calzonzi

Nurse Practitioner - Family

NPI 1003396219

Thomas Kelly

Psychiatry & Neurology - Neurology

NPI 1003967084

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

13 Historical Events

📍

Updated Practice Location March 08, 2022

Registered at 5841 S MARYLAND AVE, CHICAGO, IL 606371443 (Tel: 8888240200)

📍

Updated Business Mailing Address March 08, 2022

Registered at 150 HARVESTER DR, SUITE 300, BURR RIDGE, IL 605275919

👤

Provider Name / Credentials Updated March 08, 2022

Recorded as NICHOLAS MAASSEN

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 08, 2022

Orthopaedic Surgery (License #036152536 in IL)

📍

Updated Practice Location November 12, 2019

Registered at 10496 KATY FWY STE 101, HOUSTON, TX 770435269 (Tel: 4657175003)

📍

Updated Business Mailing Address November 12, 2019

Registered at 10496 KATY FWY STE 101, HOUSTON, TX 770435269 (Tel: 3465717500)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) November 12, 2019

Orthopaedic Surgery (License #Q1209 in TX)

✅

NPI Profile Active March 12, 2009

NPI status registered as active in NPPES database

📍

Updated Practice Location March 12, 2009

Registered at UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831, MADISON, WI 537920001 (Tel: 6082630888)

📍

Updated Business Mailing Address March 12, 2009

Registered at UW HOSPITAL AND CLINICS, 600 HIGHLAND AVE, H4/831, MADISON, WI 537920001 (Tel: 6082630888)

👤

Provider Name / Credentials Updated March 12, 2009

Recorded as NICHOLAS MAASSEN, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 12, 2009

Student in an Organized Health Care Education/Training Program

🟢

Initial NPI Registration & Enumeration July 21, 2008

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

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NPI Administrative Meta

NPI Number: 1477718302

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: July 21, 2008

Last Update: October 24, 2022

Sole Proprietor: No

Update or Correct Profile

Mailing Address

150 Harvester Dr, Suite 300

Burr Ridge, IL 605275919

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

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