Dr. Justin M. Caplan, M.D.
Neurosurgery (Neurological Surgery Physician)
1800 Orleans St, Zayed Tower, Room 6007
Baltimore, MD 21287
Who else practices at this address →
Baltimore city includes primary care (36% of residents) shortage areas. About shortage areas
- Medicare participating
At a glance
- Medical school
- Harvard Medical School (2009)
- Years since graduation
- 17
- In the NPI registry since
- 2008
- Medicare patients seen, 2024
- 135
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is
Education and training
- 2009Medical school: Harvard Medical School
- 2008Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Neurological Surgery Physician primary
MD license D76618
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Johns Hopkins Hospital, the Baltimore, MD
- Johns Hopkins Bayview Medical Center Baltimore, MD
Medical groups
- Johns Hopkins University (2,909 clinicians)
- Johns Hopkins University (197 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 135
- Services billed
- 480
- Patients’ average age
- 72
| Service | Times | Patients |
|---|---|---|
| Ultrasonic guidance for blood vessel access | 62 | 51 |
| 3d radiographic procedure with computerized image postprocessing | 49 | 30 |
| Insertion of tube into intracranial artery for diagnosis or treatment with review by radiologist | 42 | 35 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 31 | 19 |
| Insertion of tube into chest artery for diagnosis or treatment with review by radiologist | 26 | 25 |
| Insertion of tube into brain artery for diagnosis or treatment with review by radiologist | 25 | 21 |
| Established patient office or other outpatient visit, 10-19 minutes | 18 | 17 |
| Established patient office or other outpatient visit, 20-29 minutes | 16 | 16 |
| Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 15 | 15 |
| New patient office or other outpatient visit, 30-44 minutes | 14 | 14 |
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Payments from drug and device companies
In 2025, 1 companies reported 2 payments worth $47.26 in total to this clinician.
| Medtronic, Inc. | $47.26 |
|---|
| Food and Beverage | $47.26 |
|---|
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.
Industry-funded research
Named as a principal investigator on 2 industry-funded studies in 2025, from 1 companies. The companies reported $66,496 in research payments for these studies, mostly to the institutions running them.
- MicroVention, Inc. Flow Re-Direction Endoluminal Device X (FRED™ X™) Post-Approval Study
Microvention, Inc. · Active, not recruiting · NCT05409989 - Post Approval Study - Evaluate the Long-Term Safety and Effectiveness of the WEB Device
Microvention, Inc. · Active, not recruiting · NCT04839705
From CMS Open Payments research payments, where companies name up to five principal investigators per payment. Research payments usually go to hospitals, universities and research sites, not to the investigator personally. A payment is not evidence of wrongdoing.