Robert Kloss, M.D.
NPI 1649207770ActiveIndividual· Internal Medicine, Hematology & Oncology· Danbury, CT
Internal Medicine, Hematology & Oncology (M.D.) in Danbury, Connecticut, trained at Jefferson Medical College of Thomas Jefferson University (class of 1976). Their prescriptions cost Medicare Part D more than their services did: $3,874,561 for 1,016 claims, against $87,440 paid for services in 2024. Abbvie Inc. was the largest of 30 companies reporting payments in 2025, $1,845 in all, mostly food and beverage.
Overview
| NPI | 1649207770 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 26, 2006 |
| Last updated in NPPES | Nov 3, 2010 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 022825 | CT |
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 - Medical Oncology (CT) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 305 |
|---|---|
| Services billed | 1,978 across 26 procedure codes |
| Paid by Medicare | $87,440 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,016 · 1,362 30-day fills |
|---|---|
| Patients | 185 |
| Total drug cost | $3,874,561 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | Jefferson Medical College of Thomas Jefferson University |
|---|---|
| Graduation year | 1976 |
| Medicare specialty | Medical Oncology |
| Telehealth | Offers telehealth |
Medical group
- Nuvance Health Medical Practice CT IncDanbury, CT · 747 clinicians
Hospital affiliation
- Danbury HospitalDanbury, CT
Other facilities
- Regional HospiceHospice · Danbury, CT
Industry payments (Open Payments)
- 2025$1,845 · 80 payments from 30 companies
- 2024$2,552 · 120 payments from 38 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $197.72 | 8 |
| Novartis Pharmaceuticals Corporation | $190.28 | 7 |
| Astrazeneca Pharmaceuticals LP | $155.16 | 6 |
| Pfizer Inc. | $115.95 | 9 |
| Janssen Biotech, Inc. | $102.70 | 4 |
What the 2025 payments were for
- Food and Beverage$1,827 · 79 payments
- Education$17.16 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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