Doctor profile · Federal record
Dr. Thorvardur Halfdanarson, M.D.
Medical Oncology Physician (CMS: Medical Oncology) · Internal Medicine Physician · Internal Medicine Physician · Hematology & Oncology Physician · Hematology & Oncology Physician · Hematology & Oncology Physician · Rochester, MN
- NPI 1083684187
- Accepts Medicare
- 31 yrs in practice
- Licensed in 3 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
200 1St St Sw
Rochester, MN 559050001
(507) 284-2511 - Additional location
-
13400 E Shea Blvd
Scottsdale, AZ 852595452
(480) 301-8000
Credentials & registration
- NPI registered
- January 2006 — 20 yrs on file
- Profile last updated
- August 14, 2020
- Year of graduation
- 1995 — 31 yrs since
- Specialty taxonomy
- 207RX0202X — NUCC code
- State licenses (3)
- Minnesota #45995 · Iowa #37199 · Arizona #46666
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1083684187. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
27,738
Distinct HCPCS
10
Medicare allowed
$638,260
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J9271 |
Injection, pembrolizumab, 1 mg | 6,700 | 26 | $45 | |
J1453 |
Injection, fosaprepitant, 1 mg | 6,300 | 37 | $0 | |
J9267 |
Injection, paclitaxel, 1 mg | 4,752 | 22 | $0 | |
J9144 |
Injection, daratumumab, 10 mg and hyaluronidase-fihj | 3,781 | 20 | $48 | |
Q5119 |
Injection, rituximab-pvvr, biosimilar, (ruxience), 10 mg | 1,210 | 16 | $28 | |
J2405 |
Injection, ondansetron hydrochloride, per 1 mg | 1,048 | 81 | $0 | |
J1100 |
Injection, dexamethasone sodium phosphate, 1 mg | 954 | 75 | $0 | |
J9041 |
Injection, bortezomib, 0.1 mg | 615 | 16 | $5 | |
J2469 |
Injection, palonosetron hcl, 25 mcg | 340 | 29 | $1 | |
96375 |
Injection of additional new drug or substance into vein | 244 | 111 | $16 |
In context: peer comparison
Among 30 peers in Rochester Medical Oncology Physician, average services per provider: 717. This provider delivers 39× the peer median.Open Payments
Industry payments received
All-time total
$17,812
Transactions
19
Manufacturers
5
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Exelixis INC. | 15 | $14,496.02 | |
| Boehringer Ingelheim Pharmaceuticals, INC. | 1 | $2,960.00 | |
| Curium US LLC | 1 | $143.71 | |
| TerSera Therapeutics LLC | 1 | $140.25 | |
| AstraZeneca Pharmaceuticals Lp | 1 | $72.00 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
43
Patients
0
Total drug cost
$17,126
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Colestipol Hcl | Generic | 18 | 0 | $2,432 |
| Eliquis (Apixaban) | Brand | 14 | 0 | $14,551 |
| Ondansetron Hcl | Generic | 11 | 0 | $143 |
Hospital affiliations
Frequently asked questions
What is Dr. Thorvardur Halfdanarson's medical specialty?
Dr. Thorvardur Halfdanarson practices Medical Oncology Physician in Rochester, MN.
Where does Dr. Thorvardur Halfdanarson practice?
Dr. Thorvardur Halfdanarson practices at 200 1St St Sw, Rochester, MN 559050001. Office phone: 5072842511.
What is Dr. Thorvardur Halfdanarson's NPI?
Dr. Thorvardur Halfdanarson's National Provider Identifier (NPI) is 1083684187, issued by NPPES.
Does Dr. Thorvardur Halfdanarson accept Medicare assignment?
Yes. Dr. Thorvardur Halfdanarson accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Thorvardur Halfdanarson commonly perform?
Top Medicare-reported procedures in 2023: Injection, pembrolizumab, 1 mg (HCPCS J9271); Injection, fosaprepitant, 1 mg (HCPCS J1453); Injection, paclitaxel, 1 mg (HCPCS J9267). Source: CMS Medicare Physician & Other Practitioners file.