Active NPI 1538420641 Individual Practitioner Male Practitioner

Dr. Aaron J Johnson , MD

Orthopaedic Surgery • Baltimore, MD

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Aaron Johnson, MD is a certified Orthopaedic Surgery practicing in Baltimore, MD. With approximately 17 years of clinical experience since graduating from University Of Maryland School Of Medicine in 2009, Dr. Johnson delivers high-quality medical care to the local community at 22 S GREENE ST.

Dr. Johnson maintains professional affiliations with University Of Maryland Orthopaedic Associates Pa, University Of Maryland Orthopaedic Trauma Associates, P.A., Meritus Medical Center Inc and accepts Medicare assignment.

Frequently performed procedures and clinical services include injection, triamcinolone acetonide, not otherwise specified, 10 mg, established patient outpatient office visit, x-ray of knee, 1-2 views. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

22 S Greene St

Baltimore, MD 212011544

Telephone 4104486400

Associated Practice Facility / Clinic

🏢 University Of Maryland Physicians P.a. Facility NPI 1689623175

Medicare Profile & Education

Medical School

University Of Maryland School Of Medicine

Graduation Year

2009

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Orthopaedic Surgery in Baltimore, MD

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

17 Yrs -6.3 yrs vs City Avg

City Avg: 23.3 Yrs

State Avg: 28.6 Yrs

Regional Practice Density

166 Specialists

Practicing in Baltimore, MD (490 Statewide)

Telehealth Adoption Rate

18.7% 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. Johnson (17 Years) 17 Yrs

Baltimore Specialty Average (23.3 Years) 23.3 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	771	65	$6.00	$0.93
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	216	153	$367.00	$183.11
73560 X-ray of knee, 1-2 views	124	74	$76.94	$22.61
20610 Aspiration and/or injection of fluid from large joint	119	76	$347.12	$73.23
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	116	90	$254.00	$131.83
73502 X-ray of hip, 2-3 views	86	55	$95.86	$30.01
73565 X-ray of both knees while standing	84	73	$97.52	$31.16
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	61	44	$367.00	$147.35
27130 Replacement of thigh bone and hip joint with prosthesis	34	34	$6210.24	$1396.42
99213 Established patient office or other outpatient visit, typically 15 minutes	30	29	$163.00	$92.17
77073 Imaging for bone length assessment	29	27	$97.52	$32.13
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	21	16	$254.00	$99.38
27447 Replacement of knee joint, both sides of knee	20	18	$7129.00	$1402.31
27487 Revision of thigh and lower leg bone components of total knee joint prosthesis	18	18	$9391.33	$1988.61
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	15	15	$530.00	$228.59

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	326	33	$4.48	$1.08
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	260	175	$367.00	$188.09
20610 Aspiration and/or injection of fluid from large joint	135	78	$351.77	$77.39
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	129	103	$254.00	$134.75
73502 X-ray of hip, 2-3 views	94	49	$107.53	$28.35
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	89	58	$367.00	$150.13
73560 X-ray of knee, 1-2 views	71	38	$92.59	$22.32
73565 X-ray of both knees while standing	52	35	$103.10	$26.65
27130 Replacement of thigh bone and hip joint with prosthesis	45	41	$6251.13	$1408.47
27447 Replacement of knee joint, both sides of knee	34	31	$6723.76	$1394.58
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	24	23	$254.00	$102.26
99213 Established patient office or other outpatient visit, typically 15 minutes	20	18	$163.00	$92.37
27487 Revision of thigh and lower leg bone components of total knee joint prosthesis	17	15	$9656.06	$1967.75
20610 Aspiration and/or injection of fluid from large joint	12	12	$304.42	$46.20

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	225	160	$367.00	$191.23
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	119	94	$254.00	$136.71
20610 Aspiration and/or injection of fluid from large joint	107	67	$341.40	$78.53
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	68	50	$367.00	$153.84
27130 Replacement of thigh bone and hip joint with prosthesis	43	42	$6312.49	$1428.10
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	42	34	$254.00	$104.58
99221 Initial hospital inpatient care per day, typically 30 minutes	27	27	$205.00	$107.10
20610 Aspiration and/or injection of fluid from large joint	24	24	$304.42	$47.33
27447 Replacement of knee joint, both sides of knee	20	20	$6797.70	$1448.48
99213 Established patient office or other outpatient visit, typically 15 minutes	20	19	$163.00	$98.54

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	165	127	$367.00	$193.74
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	84	75	$255.35	$140.65
20610 Aspiration and/or injection of fluid from large joint	61	49	$308.64	$74.02
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	55	36	$367.00	$156.46
27130 Replacement of thigh bone and hip joint with prosthesis	34	31	$6406.47	$1463.82
99221 Initial hospital inpatient care per day, typically 30 minutes	27	27	$205.00	$108.79
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	13	12	$254.00	$107.55
27447 Replacement of knee joint, both sides of knee	12	12	$6517.33	$1459.06

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	70	52	$254.00	$114.14
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	32	23	$254.00	$81.76
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	23	21	$367.00	$158.49
20610 Aspiration and/or injection of fluid from large joint	22	20	$357.64	$76.73
99221 Initial hospital inpatient care per day, typically 30 minutes	22	21	$205.00	$110.06
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	17	17	$296.00	$116.86
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	14	13	$367.00	$113.30
27130 Replacement of thigh bone and hip joint with prosthesis	12	12	$6329.67	$1525.82
27132 Replacement of thigh bone and hip joint prosthesis	11	11	$9034.36	$2056.36

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	32	30	$254.00	$113.14
99221 Initial hospital inpatient care per day, typically 30 minutes	31	30	$205.00	$107.50
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	13	11	$254.00	$76.43

Medical Specialties & State Licenses

Orthopaedic Surgery Primary Specialty

NUCC Taxonomy Code: 207X00000X

State License MD D85157

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.

Orthopaedic Surgery - Orthopaedic Trauma

NUCC Taxonomy Code: 207XX0801X

State License MD D85157

Recognized by several state medical boards as a fellowship subspecialty program of orthopaedic surgery, orthopaedic trauma surgeons deal with the evaluation and management of acute orthopaedic injuries, evaluation and treatment of post-traumatic deformities and nonunions, acute and delayed reconstruction of pelvic and acetabular fractures, as well as osteotomy in the adult hip for treatment of hip arthritis.

Hospital & Practice Group Affiliations

University Of Maryland Orthopaedic Associates Pa

2200 Kernan Dr, Baltimore, MD 212076665

Phone: 4103286704

University Of Maryland Orthopaedic Trauma Associates, P.a.

22 S Green St, Baltimore, MD 212011544

University Of Maryland Orthopaedic Associates Pa

2200 Kernan Dr, Baltimore, MD 212076665

Meritus Medical Center Inc

11110 Medical Campus Rd, Hagerstown, MD 217426700

University Of Maryland Orthopaedic Associates Pa

22 S Green St, Baltimore, MD 212011544

Phone: 4103286704

University Of Maryland Community Medical Group Inc

255 Hospital Dr, Glen Burnie, MD 210615801

Phone: 4105538170

Secondary Practice Locations

1250 E Marshall St # 980153

Richmond, VA 232985051

Phone: 8046282676

Practice Associates & Co-Workers

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

34 Associated Practitioners

Dr. Brent Bauer , MD

Orthopaedic Surgery - Orthopaedic Trauma

NPI 1033312632

Doctor of Medicine (M.D.)

Dr. Joseph Park , MD

Pediatrics - Sports Medicine

NPI 1053990937

Doctor of Medicine (M.D.)

Stephen Eaton

Physical Therapist

NPI 1104604545

Dr. Natalie Leong , MD

Orthopaedic Surgery - Sports Medicine

NPI 1114217411

Doctor of Medicine (M.D.)

Kelli Millican , PA-C

Physician Assistant - Surgical

NPI 1184134140

Physician Assistant (Certified)

Dr. Raymond Pensy , MD

Orthopaedic Surgery

NPI 1205929213

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

10 Historical Events

📍

Updated Practice Location July 22, 2019

Registered at 22 S GREENE ST, BALTIMORE, MD 212011544 (Tel: 4104486400)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 14, 2019

Orthopaedic Surgery (License #D85157 in MD)

📍

Updated Practice Location July 24, 2018

Registered at 1250 E MARSHALL ST # 980153, RICHMOND, VA 232985051 (Tel: 8046282676)

📍

Updated Business Mailing Address July 24, 2018

Registered at PO BOX 980153, RICHMOND, VA 232980153 (Tel: 8046282676)

✅

NPI Profile Active June 05, 2012

NPI status registered as active in NPPES database

📍

Updated Practice Location June 05, 2012

Registered at 22 S GREENE ST, BALTIMORE, MD 212011544 (Tel: 4104486400)

📍

Updated Business Mailing Address June 05, 2012

Registered at 2341 EASTERN AVE, BALTIMORE, MD 212243612 (Tel: 4107039157)

👤

Provider Name / Credentials Updated June 05, 2012

Recorded as AARON JOHNSON, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 05, 2012

Student in an Organized Health Care Education/Training Program

🟢

Initial NPI Registration & Enumeration June 05, 2012

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1538420641

Entity Type:

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

Enumeration Date: June 05, 2012

Last Update: July 22, 2019

Sole Proprietor: No

Update or Correct Profile

Mailing Address

Po Box 980153

Richmond, VA 232980153

Phone: 8046282676

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

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.