Quick answers
- Does David R. Dorfman accept Medicare assignment?
- Yes. Medicare's clinician data says David R. Dorfman accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does David R. Dorfman see?
- In 2024, CMS data shows 1,480 Original Medicare patients and 22,927 services for David R. Dorfman. This counts Original Medicare only and measures volume, not quality.
- What is David R. Dorfman's NPI number?
- 1609846138. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for David R. Dorfman, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 1,480 |
|---|---|
| Services billed to Medicare | 22,927 |
| Different services or procedures | 93 |
| Participating Medicare provider | Yes |
| Average age of these patients | 74 |
Most frequent services
- Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml (Q9967)15,084 services
- Injection, gadoterate meglumine, 0.1 ml (A9575)5,690 services
- Fine needle aspiration biopsy using ultrasound guidance, first growth (10005)339 services
- Blood creatinine level (82565)144 services
- Fine needle aspiration biopsy using ultrasound guidance, each additional growth (10006)119 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Diabetes40%
- Ischemic heart disease39%
- Anxiety29%
Practice locations
Addresses where David R. Dorfman is enrolled with Medicare (CMS data updated October 2, 2026).
- 126 Hicksville RdMassapequa, NY 11758 (516) 798‑4242
Group practices
Medicare enrollment lists David R. Dorfman as a member of this group (CMS data updated October 2, 2026).
- Zwanger and Pesiri Radiology Group LLP93 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Other clinicians in Zwanger and Pesiri Radiology Group LLP
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1980 (46 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1609846138 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians