Klaus Dittmar, M.D.
NPI 1245239664ActiveIndividual· Internal Medicine, Hematology & Oncology· New Hyde Park, NY
Internal Medicine, Hematology & Oncology (M.D.) with New York University, practicing in New Hyde Park, New York. Mostly services rather than prescriptions: Medicare paid $29,766 for 65 patients in 2024, with only 17 Part D claims. Lists NYU Langone Hospitals as a hospital affiliation.
Overview
| NPI | 1245239664 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 18, 2005 |
| Last updated in NPPES | Mar 25, 2021 |
| Certified by provider | Mar 25, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 089981 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 65 |
|---|---|
| Services billed | 547 across 13 procedure codes |
| Paid by Medicare | $29,766 |
Part D prescriptions in 2024
| Prescriptions (claims) | 17 · 25 30-day fills |
|---|---|
| Total drug cost | $743.71 |
| Generic share | 94% of claims |
Education and affiliations
| Graduation year | 1957 |
|---|---|
| Medicare specialty | Hematology/Oncology |
Medical group
- New York UniversityNew York, NY · 6,134 clinicians
Hospital affiliation
- NYU Langone HospitalsNew York, NY
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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