Physician Profile
Unclaimed ProfileAbout O'CALLAGHAN
Based in Tacoma, WA, Mark Gerard O'Callaghan, M.D. is listed in the NPI registry under diagnostic radiology. Mark is also listed as specialising in nuclear medicine.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Common questions
What kind of doctor is Dr. O'Callaghan?
Dr. O'Callaghan is a diagnostic radiology in Tacoma, WA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “DIAGNOSTIC RADIOLOGY”.
NPI registry
What is Dr. O'Callaghan's address?
Dr. O'Callaghan is listed at 209 MARTIN LUTHER KING JR WAY, Tacoma, WA 98405. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. O'Callaghan?
The number on file is (253) 596-3300. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. O'Callaghan's NPI number?
Dr. O'Callaghan's National Provider Identifier is 1023180890. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. O'Callaghan train?
Dr. O'Callaghan attended Other, graduating in 1993. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. O'Callaghan been practising?
Dr. O'Callaghan has 33 years experience. Calculated from a graduation year of 1993, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. O'Callaghan perform?
According to Medicare billing data, Dr. O'Callaghan performs imaging including x-ray of lower and sacral spine, 2-3 views and x-ray of chest, 2 views. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. O'Callaghan confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. O'Callaghan. If this is you, claiming it is free.
Guide.md
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (253) 596-3300
- Email not available
Practice Locations
209 MARTIN LUTHER KING JR WAY
Tacoma, WA 98405
Procedures Most Often Billed to Medicare
41 services · 41 patients · 2 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| X-ray of lower and sacral spine, 2-3 views | Imaging | 72100 |
21 |
| X-ray of chest, 2 views | Imaging | 71046 |
20 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other diagnostic radiology specialists at this location 4
Same specialty, same street address — most likely the same department or group.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other diagnostic radiology specialists in Tacoma 7
Same specialty, same city.
More connections — 23 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1993 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs X-ray of lower and sacral spine, 2-3 views 7
Providers in WA who bill this service to Medicare most often.
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.