Dr. Aaron J Johnson , MD
Orthopaedic Surgery โข Baltimore, MD
22 S Greene St
Baltimore, MD 212011544
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Aaron Johnson is listed in NPPES under Orthopaedic Surgery.
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NPI assigned on June 5, 2012; this date does not establish years in practice.
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Published CMS data list 1,744 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- J3301 โ Injection, triamcinolone acetonide, not otherwise specified, 10 mg: 771 service units.
- 99215 โ Established patient outpatient office visit: 216 service units.
- 73560 โ X-ray of knee, 1-2 views: 124 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 15 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 88 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Meloxicam โ 48 prescription fills, including refills.
- Amoxicillin โ 29 prescription fills, including refills.
- Mupirocin โ 11 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 65% of clinicians listed under Orthopaedic Surgery in Baltimore, MD (2024, 85 clinicians with data). Median for this group: 742. Middle half: 201 to 2,420.
Close to the middle for Medicare Part B services among clinicians listed under Orthopaedic Surgery in Maryland (2024, 259 clinicians with data). Median for this group: 1,859. Middle half: 582 to 4,707.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 223 in 2020 to 1,744 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
22 S Greene St
Baltimore, MD 212011544
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Richmond, VA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 4 distinct group names: Meritus Medical Center Inc; University Of Maryland Community Medical Group Inc; University Of Maryland Orthopaedic Associates Pa and 1 more. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
University Of Maryland School Of Medicine
2009
What Public CMS Data Show
Orthopaedic Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
387 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $201,798 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $156,457 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
178 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$401 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $14,457.62 across 11 records.
By nature of payment (3 largest of 4)
- Consulting Fee: $12,100.00 across 1 record.
- Travel and Lodging: $1,014.06 across 2 records.
- Compensation for serving as faculty or as a speaker for a medical education program: $1,000.00 across 2 records.
Reporting-company totals
- Medical Device Business Services, Inc.: $13,362.32 across 7 records.
- Synthes GmbH: $1,000.00 across 2 records.
- Zimmer Biomet Holdings, Inc.: $95.30 across 2 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
17 years (graduated 2009)
CMS Doctors and Clinicians data list 2009 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2012
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Johnson has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Johnson as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Baltimore and Maryland
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 65% of clinicians listed under Orthopaedic Surgery in Baltimore, MD (2024, 85 clinicians with data). Median for this group: 742. Middle half: 201 to 2,420.
Close to the middle for clinicians listed under Orthopaedic Surgery in Maryland (2024, 259 clinicians with data). Median for this group: 1,859. Middle half: 582 to 4,707.
Medicare-allowed amount
A higher Medicare-allowed amount than 75% of clinicians listed under Orthopaedic Surgery in Baltimore, MD (2024, 85 clinicians with data). Median for this group: $59,846. Middle half: $18,142 to $201,798.
A higher Medicare-allowed amount than 65% of clinicians listed under Orthopaedic Surgery in Maryland (2024, 259 clinicians with data). Median for this group: $135,851. Middle half: $48,509 to $252,010.
Paid by Medicare
A higher Medicare payment amount than 75% of clinicians listed under Orthopaedic Surgery in Baltimore, MD (2024, 85 clinicians with data). Median for this group: $43,567. Middle half: $13,253 to $156,457.
A higher Medicare payment amount than 65% of clinicians listed under Orthopaedic Surgery in Maryland (2024, 259 clinicians with data). Median for this group: $98,867. Middle half: $36,856 to $190,123.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Orthopaedic Surgery in Baltimore, MD (2024, 57 clinicians with data). Median for this group: 69. Middle half: 28 to 140.
Fewer Part D prescriptions than 60% of clinicians listed under Orthopaedic Surgery in Maryland (2024, 234 clinicians with data). Median for this group: 141. Middle half: 54 to 320.
Part D drug cost
Close to the middle for clinicians listed under Orthopaedic Surgery in Baltimore, MD (2024, 57 clinicians with data). Median for this group: $356. Middle half: $107 to $1,374.
A lower Part D drug cost than 65% of clinicians listed under Orthopaedic Surgery in Maryland (2024, 234 clinicians with data). Median for this group: $1,019. Middle half: $320 to $3,187.
158 active clinicians are listed under Orthopaedic Surgery with a practice address in Baltimore, MD (457 in Maryland).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Baltimore
19.6% of these 158 clinicians have the CMS telehealth indicator.
45.6% of these 158 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 682% from 223 in 2020 to 1,744 in 2024.
- 2020: 223
- 2021: 451
- 2022: 695
- 2023: 1,308
- 2024: 1,744
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Medicare-allowed amount
Medicare-allowed amount increased 221% from $62,863 in 2020 to $201,798 in 2024.
- 2020: $62,863
- 2021: $128,516
- 2022: $178,928
- 2023: $245,188
- 2024: $201,798
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Paid by Medicare
Paid by Medicare increased 217% from $49,300 in 2020 to $156,457 in 2024.
- 2020: $49,300
- 2021: $100,768
- 2022: $137,849
- 2023: $190,111
- 2024: $156,457
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 16% from 76 in 2020 to 88 in 2024.
- 2020: 76
- 2021: 61
- 2022: 53
- 2023: 86
- 2024: 88
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30-day fills
30-day fills increased 116% from 82 in 2020 to 178 in 2024.
- 2020: 82
- 2021: 131
- 2022: 111
- 2023: 160
- 2024: 178
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Part D drug cost
Part D drug cost went from $659 in 2020 to $401 in 2024.
- 2020: $659
- 2021: $703
- 2022: $446
- 2023: $732
- 2024: $401
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $52.18 in 2021 to $14,457.62 in 2025.
- 2021: $52.18
- 2022: $233.81
- 2023: $332.79
- 2024: $1,706.17
- 2025: $14,457.62
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): 11 records totaling $14,457.62.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Medical Device Business Services, Inc. |
Consulting Fee
Cash or cash equivalent
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โ | General | $12,100.00 |
| Medical Device Business Services, Inc. |
Travel and Lodging
In-kind items and services
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ATTUNE | General | $765.76 |
| Synthes GmbH |
Compensation for serving as faculty or as a speaker for a medical education program
Cash or cash equivalent
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โ | General | $500.00 |
| Synthes GmbH |
Compensation for serving as faculty or as a speaker for a medical education program
Cash or cash equivalent
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โ | General | $500.00 |
| Medical Device Business Services, Inc. |
Travel and Lodging
In-kind items and services
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ATTUNE | General | $248.30 |
| Medical Device Business Services, Inc. |
Food and Beverage
In-kind items and services
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ATTUNE | General | $138.26 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
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Tapestry | General | $69.62 |
| Medical Device Business Services, Inc. |
Food and Beverage
In-kind items and services
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ATTUNE | General | $50.00 |
| Medical Device Business Services, Inc. |
Food and Beverage
In-kind items and services
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ATTUNE | General | $40.00 |
| Zimmer Biomet Holdings, Inc. |
Food and Beverage
In-kind items and services
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Persona | General | $25.68 |
| Medical Device Business Services, Inc. |
Food and Beverage
In-kind items and services
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ATTUNE | General | $20.00 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2018โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2019โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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J3301
Injection, triamcinolone acetonide, not otherwise specified, 10 mg
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771 | 65 | $6.00 | $0.93 |
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99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
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216 | 153 | $367.00 | $183.11 |
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73560
X-ray of knee, 1-2 views
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124 | 74 | $76.94 | $22.61 |
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20610
Aspiration and/or injection of fluid from large joint
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119 | 76 | $347.12 | $73.23 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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116 | 90 | $254.00 | $131.83 |
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73502
X-ray of hip, 2-3 views
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86 | 55 | $95.86 | $30.01 |
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73565
X-ray of both knees while standing
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84 | 73 | $97.52 | $31.16 |
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99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
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61 | 44 | $367.00 | $147.35 |
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27130
Replacement of thigh bone and hip joint with prosthesis
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34 | 34 | $6210.24 | $1396.42 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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30 | 29 | $163.00 | $92.17 |
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77073
X-ray for bone length assessment
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29 | 27 | $97.52 | $32.13 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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21 | 16 | $254.00 | $99.38 |
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27447
Replacement of knee joint, both sides of knee
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20 | 18 | $7129.00 | $1402.31 |
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27487
Revision of thigh and lower leg bone components of total knee joint prosthesis
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18 | 18 | $9391.33 | $1988.61 |
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99205
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more
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15 | 15 | $530.00 | $228.59 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Meloxicam | Meloxicam | 48 | 4,106 | $314.51 | 24 |
| Amoxicillin | Amoxicillin | 29 | 92 | $31.00 | 12 |
| Mupirocin | Mupirocin | 11 | 206 | $55.25 | 11 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207X00000X
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.
NUCC Taxonomy Code: 207XX0801X
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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - ORTHOPEDIC SURGERY
I20251118001427
DC
1951600121
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
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
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physical Medicine & Rehabilitation
Doctor of Medicine (M.D.)
Orthopaedic Surgery - Orthopaedic Trauma
Doctor of Medicine (M.D.)
Emergency Medicine
Doctor of Medicine (M.D.)
Internal Medicine - Sports Medicine
Doctor of Osteopathic Medicine (D.O.)
Physician Assistant
Orthopaedic Surgery
Doctor of Osteopathic Medicine (D.O.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 22 S GREENE ST, BALTIMORE, MD 212011544 (Tel: 4104486400)
Orthopaedic Surgery (license number reported to NPPES: MD D85157)
Registered at 1250 E MARSHALL ST # 980153, RICHMOND, VA 232985051 (Tel: 8046282676)
Registered at PO BOX 980153, RICHMOND, VA 232980153 (Tel: 8046282676)
NPI status registered as active in NPPES database
Registered at 22 S GREENE ST, BALTIMORE, MD 212011544 (Tel: 4104486400)
Registered at 2341 EASTERN AVE, BALTIMORE, MD 212243612 (Tel: 4107039157)
Recorded as AARON JOHNSON, MD
Student in an Organized Health Care Education/Training Program
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Orthopaedic Surgery Specialists in Baltimore
- Dr. Wesley Durand, MD
- Dr. Babar Shafiq, MD
- Dr. Vincent Ng, MD
- Dr. David Cohen, MD
- Leigh Curl
- Dr. Brock Lindsey, MD
Mailing Address
Po Box 980153
Richmond, VA 232980153
Phone: 8046282676