Physician Profile
John T. Antoniades, MD
Unclaimed ProfileAbout Dr. Antoniades
John T. Antoniades, MD practices orthopaedic surgery in Baltimore, MD. John is a 1994 graduate of University of Maryland School of Medicine. John is also listed as specializing in orthopaedic adult reconstructive surgery and orthopaedic sports medicine. According to Medicare claims data, John cared for 1,439 Medicare patients across 4,801 services. The services billed most often include injection, triamcinolone acetonide, not otherwise specified, 10 mg, established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, and aspiration and/or injection of fluid from large joint.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (667) 234-9992
- Email not available
Practice Locations
3449 WILKENS AVE STE 300
Baltimore, MD 21229
3449 Wilkens Ave Suite 107
Baltimore, MD 21229
Conditions Commonly Evaluated or Treated
Within Orthopedic Surgery generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Elbow, hand, and wrist
Foot and ankle
Hip
Shoulder
Sports and soft tissue
Trauma and bone
Foot & Ankle
Spine
Procedures & services
Most searched procedures
Evaluation and nonsurgical
Arthroscopy
Foot & Ankle
Foot and ankle
Hand & Wrist
Hand and upper extremity
Injections & Non-Surgical
Injections & pain relief
Joint replacement
- Partial knee replacement
- Reverse shoulder replacement
- Revision joint replacement
- Shoulder replacement
Knee
Shoulder surgery
Trauma & Fractures
Trauma and fixation
Procedures Most Often Billed to Medicare
4,801 services · 1,439 patients · 9 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Aspiration and/or injection of fluid from large joint | Procedure | 20610 |
626 | More than most peers in Orthopaedic Surgery |
| Replacement of knee joint, both sides of knee | Procedure | 27447 |
20 | |
| Removal of joint lining from multiple knee joint compartments using an endoscope | Procedure | 29876 |
16 | As often as other peers in Orthopaedic Surgery |
| Removal of knee cartilage using an endoscope | Procedure | 29881 |
14 | As often as other peers in Orthopaedic Surgery |
| Replacement of thigh bone and hip joint with prosthesis | Procedure | 27130 |
13 | |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | Drug given | J3301 |
2,865 | More than most peers in Orthopaedic Surgery |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
1,089 | More than most peers in Orthopaedic Surgery |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
128 | More than most peers in Orthopaedic Surgery |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
30 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other orthopaedic surgeons at this location 2
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other orthopaedic surgeons in Baltimore 8
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at University of Maryland School of Medicine 7
Other providers in the same specialty who trained at the same institution.
Class of 1994 at University of Maryland School of Medicine 8
Providers who graduated from the same medical school in the same year.
Also performs Aspiration and/or injection of fluid from large joint 8
Providers in MD who bill this service to Medicare most often.
Common questions
What does Dr. Antoniades specialize in?
Dr. Antoniades is an orthopaedic surgeon in Baltimore, MD. That is the designation recorded for this NPI in the federal registry, where it is listed as “Orthopaedic Surgery”.
NPI registry
Where is Dr. Antoniades located?
Dr. Antoniades is listed at 3449 Wilkens Ave Ste 300, Baltimore, MD 21229. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Antoniades's phone number?
The number on file is (667) 234-9992. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. Antoniades's NPI number?
Dr. Antoniades's National Provider Identifier is 1437187960. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Antoniades go to medical school?
Dr. Antoniades attended University of Maryland School of Medicine, graduating in 1994. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Antoniades been practicing?
Dr. Antoniades has 32 years experience. Calculated from a graduation year of 1994, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Antoniades do most often?
According to Medicare billing data, Dr. Antoniades performs procedures including aspiration and/or injection of fluid from large joint, replacement of knee joint, both sides of knee and removal of joint lining from multiple knee joint compartments using an endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Antoniades confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Antoniades. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.