Doctor profile · Federal record
Dr. Ross Ondersma, MD
Diagnostic Radiology Physician (CMS: Diagnostic Radiology) · Diagnostic Radiology Physician · Nuclear Medicine Physician · Diagnostic Radiology Physician · Lynnwood, WA
- NPI 1841403110
- Accepts Medicare
- 20 yrs in practice
- Licensed in 3 states
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
19020 33Rd Ave W Ste 210
Lynnwood, WA 980364748
(425) 563-1500
fax (425) 563-1501 - Additional location
-
203 S Western Ave
Tonasket, WA 988558803
(509) 486-2151
fax (509) 223-1640 - Additional location
-
939 Caroline St
Port Angeles, WA 983623909
(360) 417-7735
fax (360) 565-9074
Credentials & registration
- NPI registered
- May 2007 — 19 yrs on file
- Profile last updated
- February 23, 2026
- Year of graduation
- 2006 — 20 yrs since
- Specialty taxonomy
- 2085R0202X — NUCC code
- State licenses (3)
- Washington #MD60292915 · Indiana #01066258A · Michigan #4301088540
- Medicaid
- WA #2022790
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1841403110. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
2,984
Distinct HCPCS
10
Medicare allowed
$339,024
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
78815 |
Nuclear medicine study from skull base to mid-thigh with ct scan | 678 | 627 | $114 | |
78306 |
Nuclear medicine study of bone and/or joint whole body | 279 | 255 | $41 | |
78815 |
Nuclear medicine study from skull base to mid-thigh with ct scan | 265 | 256 | $476 | |
71045 |
X-ray of chest, 1 view | 243 | 234 | $9 | |
74177 |
Ct scan of abdomen and pelvis with contrast | 82 | 82 | $88 | |
78816 |
Nuclear medicine study whole body with ct scan | 79 | 75 | $116 | |
78264 |
Nuclear medicine study of stomach to assess emptying | 61 | 61 | $38 | |
71260 |
Ct scan of chest with contrast | 60 | 60 | $53 | |
78452 |
Nuclear medicine studies of heart muscle at rest and with stress and spect | 56 | 56 | $79 | |
78803 |
Nuclear medicine study, spect imaging, 1 area or single acquisition, single day imaging | 56 | 56 | $51 |
In context: peer comparison
Among 49 peers in this city , average services per provider: 186. This provider delivers 16× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Ross Ondersma's medical specialty?
Dr. Ross Ondersma practices Diagnostic Radiology Physician in Lynnwood, WA.
Where does Dr. Ross Ondersma practice?
Dr. Ross Ondersma practices at 19020 33Rd Ave W Ste 210, Lynnwood, WA 980364748. Office phone: 4255631500.
What is Dr. Ross Ondersma's NPI?
Dr. Ross Ondersma's National Provider Identifier (NPI) is 1841403110, issued by NPPES.
Does Dr. Ross Ondersma accept Medicare assignment?
Yes. Dr. Ross Ondersma accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ross Ondersma commonly perform?
Top Medicare-reported procedures in 2023: Nuclear medicine study from skull base to mid-thigh with ct scan (HCPCS 78815); Nuclear medicine study of bone and/or joint whole body (HCPCS 78306); Nuclear medicine study from skull base to mid-thigh with ct scan (HCPCS 78815). Source: CMS Medicare Physician & Other Practitioners file.