Dr. David S. Klein, MD
Radiology (Diagnostic Radiology Physician)
- Medicare participating
At a glance
- Medical school
- New York University School of Medicine (1995)
- Years since graduation
- 31
- In the NPI registry since
- 2006
- Medicare patients seen, 2024
- 1,627
Licensed in Connecticut since 2001, according to the Connecticut Department of Public Health. We show license dates only for the states that publish them in bulk; see which states do. For other states, check the state medical board.
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
- 1995Medical school: New York University School of Medicine
- 2006Registered 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
-
Diagnostic Radiology Physician primary
CT license 039370 (first issued 2001; active)
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Greenwich Hospital Association - Greenwich, CT
- Stamford Hospital Stamford, CT
Medical groups
- Stamford Health Medical Group Inc (444 clinicians)
- Stamford Health-Norwalk Radiology LLC (16 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
- 1,627
- Services billed
- 2,529
- Patients’ average age
- 77
| Service | Times | Patients |
|---|---|---|
| X-ray of chest, 1 view | 459 | 405 |
| X-ray of chest, 2 views | 268 | 256 |
| 3d radiographic procedure | 232 | 226 |
| Ct scan head or brain without contrast | 168 | 162 |
| Ct scan of abdomen and pelvis with contrast | 159 | 154 |
| Ct scan of chest without contrast | 154 | 151 |
| Ct scan of blood vessels of chest with contrast | 99 | 97 |
| Ct scan of chest with contrast | 87 | 81 |
| Ct scan of blood vessels of abdomen and pelvis with contrast | 72 | 70 |
| Ct scan of abdomen and pelvis without contrast | 66 | 65 |
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 1 payments worth $26.49 in total to this clinician.
| Terumo Medical Corporation | $26.49 |
|---|
| Food and Beverage | $26.49 |
|---|
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.