John T. Antoniades, MD
Orthopaedic Surgery Physician · Baltimore, MD
John T. Antoniades, MD is an orthopaedic surgery physician with a practice address in Baltimore, Maryland, and NPI 1437187960, issued on Jun 30, 2006. Check the license (Maryland D0058226, as entered in NPPES) on the Maryland Board of Physicians; the Medicare figures below come from public CMS files.
- Name
- John T. Antoniades
- Credential
- MD
- Primary taxonomy
- Orthopaedic Surgery Physician 207X00000X
- License number
- D0058226 MD
Self-reported in NPPES; status is on the state search - Practice location
- 3449 Wilkens Ave Ste 300, Baltimore, MD 21229
- Phone
- (667) 234-9992
- Enumerated
- Jun 30, 2006
- Record last updated
- May 2, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (667) 234-9997
- Medicaid ID
- 405613200 MD
- Medicare enrollment
- Enrolled (PECOS I20040810000292); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 1994
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest orthopaedic surgery physician records → All 457 in Maryland → Look up another NPI →
Also registered at 3449 Wilkens Ave Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Christopher Badger, MDInternal Medicine Physician1477880094
- Sundaram Chettiar, M.D.Pain Medicine (Anesthesiology) Physician1497047641
- William Kang, M.D.Orthopaedic Surgery Physician1518302462
Verify John T. Antoniades in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMaryland Board of Physicians
Search for license D0058226Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% fewer Medicare Part D claims than the average orthopaedic surgery physician in 2024
197 Medicare Part D claims for 92 beneficiaries, against an average of 346 among the 16,516 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims. 58 claims were for opioids.
Most prescribed
- Meloxicam69 claims
- Tramadol Hcl34 claims
- Cephalexin25 claims
- Oxycodone Hcl20 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- St Agnes Healthcare IncBaltimore, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John T. Antoniades among 457 orthopaedic surgery physician records in Maryland
John T. Antoniades, MD is one of 457 orthopaedic surgery physician records with a practice address in Maryland. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 17% of them.
- NPI issued2006 · 17% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1994 · median 2002 among the 299 with a school on file
- Record last updated2019 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207X00000X and a Maryland practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Surgery Physician providers in Maryland
There are 457 orthopaedic surgery physician records in Maryland.
All 457 in Maryland → Every provider in Baltimore → Orthopaedic Surgery Physician nationwide →
The 8 orthopaedic surgery physician records with the nearest ZIP codes
- Paul Apostolo, M.D.Baltimore, MD 212291295776730
- William Kang, M.D.Baltimore, MD 212291518302462
- Jonathan Dunn, M.D.Baltimore, MD 212281558312983
- Nicholas Grosso, MDCatonsville, MD 212281376547125
- Richard Kinnard, M.D.Catonsville, MD 212281821092693
- Morris Polsky, M.D.Catonsville, MD 212281144224916
- Scott Silverstein, MDCatonsville, MD 212281336174309
- Sam Sydney, M.D.Catonsville, MD 212281518961283
Common questions
What is John T. Antoniades, MD's NPI number?
John T. Antoniades, MD's National Provider Identifier (NPI) is 1437187960, issued on Jun 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John T. Antoniades, MD located?
The NPPES record lists a practice address at 3449 Wilkens Ave Ste 300, Baltimore, MD, 21229. Phone: (667) 234-9992. Providers update this record themselves, so call before visiting.
How can I verify John T. Antoniades, MD's license?
NPPES lists Maryland license number D0058226, as entered by the provider. Search the Maryland Board of Physicians at https://www.mbp.state.md.us/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John T. Antoniades, MD prescribe under Medicare Part D?
In 2024, John T. Antoniades, MD had 197 Medicare Part D claims for 92 beneficiaries; the average among orthopaedic surgery physician prescribers was 346. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.