Doctor profile · Federal record
Dr. Mark Welnick, M.D.
Diagnostic Radiology Physician (CMS: Diagnostic Radiology) · Diagnostic Radiology Physician · Green Bay, WI
- NPI 1255698221
- Accepts Medicare
- 14 yrs in practice
- Licensed in 2 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 6 locations .
- Primary practice
-
744 S Webster Ave
Green Bay, WI 543013505
(920) 433-6084
fax (920) 445-7289 - Additional location
-
2820 Roosevelt RD
Marinette, WI 541433834
(715) 735-5225
fax (715) 735-5388 - Additional location
-
2845 Greenbrier RD
Green Bay, WI 543116519
(920) 288-4848
fax (920) 288-4956 - Additional location
-
820 Arbutus Ave
Oconto, WI 541532004
(920) 835-1100
fax (920) 835-1099 - Additional location
-
440 Woodward Ave
Iron Mountain, MI 498014631
(906) 776-9040
fax (906) 774-7279 - Additional location
-
610 S Lincoln RD
Escanaba, MI 498291215
(906) 786-6488
fax (906) 786-6409 - Mailing address
-
Po Box 22487
Green Bay, WI 543052487
Show 3 more locations
Credentials & registration
- NPI registered
- April 2012 — 14 yrs on file
- Profile last updated
- August 28, 2025
- Year of graduation
- 2012 — 14 yrs since
- Specialty taxonomy
- 2085R0202X — NUCC code
- State licenses (2)
- Wisconsin #66995-20 · Minnesota #63777
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1255698221. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
689
Distinct HCPCS
10
Medicare allowed
$25,448
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
93880 |
Ultrasound of both sides of head and neck blood flow | 137 | 137 | $36 | |
93971 |
Ultrasound study of one arm or leg veins with compression and maneuvers | 106 | 103 | $20 | |
99152 |
Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes | 86 | 76 | $11 | |
76937 |
Ultrasonic guidance for blood vessel access | 58 | 50 | $13 | |
76706 |
Ultrasound scan of abdominal aorta | 50 | 50 | $25 | |
93970 |
Ultrasound study of arm or leg veins with compression and maneuvers | 32 | 32 | $31 | |
93922 |
Ultrasound study of arm and leg arteries | 24 | 24 | $11 | |
93926 |
Ultrasound of one leg arteries or artery grafts | 22 | 22 | $21 | |
76775 |
Limited ultrasound scan behind abdominal cavity | 20 | 20 | $26 | |
76942 |
Ultrasonic guidance for needle placement | 20 | 19 | $29 |
In context: peer comparison
Among 15 peers in Green Bay Diagnostic Radiology Physician, average services per provider: 117. This provider delivers 5.9× the peer median.Open Payments
Industry payments received
All-time total
$8,397
Transactions
30
Manufacturers
5
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Penumbra, INC. | 11 | $7,569.79 | |
| Inari Medical, INC. | 13 | $418.93 | |
| W. L. Gore & Associates, INC. | 4 | $366.38 | |
| Boston Scientific Corporation | 1 | $24.39 | |
| Surmodics, INC. | 1 | $17.96 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
39
Patients
0
Total drug cost
$11,203
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Clopidogrel (Clopidogrel Bisulfate) | Brand | 22 | 0 | $241 |
| Eliquis (Apixaban) | Brand | 17 | 0 | $10,962 |
Frequently asked questions
What is Dr. Mark Welnick's medical specialty?
Dr. Mark Welnick practices Diagnostic Radiology Physician in Green Bay, WI.
Where does Dr. Mark Welnick practice?
Dr. Mark Welnick practices at 744 S Webster Ave, Green Bay, WI 543013505. Office phone: 9204336084.
What is Dr. Mark Welnick's NPI?
Dr. Mark Welnick's National Provider Identifier (NPI) is 1255698221, issued by NPPES.
Does Dr. Mark Welnick accept Medicare assignment?
Yes. Dr. Mark Welnick accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Welnick commonly perform?
Top Medicare-reported procedures in 2023: Ultrasound of both sides of head and neck blood flow (HCPCS 93880); Ultrasound study of one arm or leg veins with compression and maneuvers (HCPCS 93971); Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older) (HCPCS 99152). Source: CMS Medicare Physician & Other Practitioners file.