Mark Gerard O'Callaghan, M.D.
Neuroradiology Physician · Tacoma, WA
Mark Gerard O'Callaghan, M.D. is a neuroradiology physician with a practice address in Tacoma, Washington, and NPI 1023180890, issued on Nov 15, 2006. Check the license (Washington MD00047091, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Mark Gerard O'Callaghan
- Credential
- M.D.
- Primary taxonomy
- Neuroradiology Physician 2085N0700X
- License number
- MD00047091 WA
Self-reported in NPPES; status is on the state search - Practice location
- 209 Martin Luther King JR Way, Tacoma, WA 98405
- Phone
- (253) 596-3300
- Enumerated
- Nov 15, 2006
- Record last updated
- Apr 28, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid ID
- 8469579 WA
- Medicare enrollment
- Enrolled (PECOS I20070112000138); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest neuroradiology physician records → All 46 in Washington → Look up another NPI →
Also registered at 209 Martin Luther King JR Way
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alireza Abdolmohammadi, MDMedical Oncology Physician1871816207
- Karen Ackerman, M.D.Diagnostic Radiology Physician1164574554
- Natasha Alciso, PA-CPhysician Assistant1982299400
- Fahad Alroumi, M.D.Critical Care Medicine (Internal Medicine) Physician1295010676
- Michael Alston, MDPediatrics Physician1023403193
- Charles Anderson, M.D.Pulmonary Disease Physician1225004120
Verify Mark Gerard O'Callaghan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00047091Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- Kaiser Foundation Health Plan OF WashingtonTacoma, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Gerard O'Callaghan among 46 neuroradiology physician records in Washington
Mark Gerard O'Callaghan, M.D. is one of 46 neuroradiology physician records with a practice address in Washington. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 52% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 65% of these records are
- Graduated1993 · median 2001 among the 30 with a school on file
- Record last updated2021 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085N0700X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Neuroradiology Physician providers in Washington
There are 46 neuroradiology physician records in Washington.
All 46 in Washington → Every provider in Tacoma → Neuroradiology Physician nationwide →
The 8 neuroradiology physician records with the nearest ZIP codes
- Drew Lambert, M.D.Tacoma, WA 984051427100627
- Kenneth Zirinsky, M.D.Tacoma, WA 984051245397835
- Malcolm Whitaker, M.D.Tacoma, WA 984311811977267
- Stephen Yoest, M.D.Tacoma, WA 984311093787202
- Mitchell Kok, MDOlympia, WA 985061831175421
- Alan Williams, MDBlaine, WA 982301770519753
- Norman BeauchampSeattle, WA 981951649358003
- Jayson Benjert, D.O.Seattle, WA 981951407025562
Common questions
What is Mark Gerard O'Callaghan, M.D.'s NPI number?
Mark Gerard O'Callaghan, M.D.'s National Provider Identifier (NPI) is 1023180890, issued on Nov 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark Gerard O'Callaghan, M.D. located?
The NPPES record lists a practice address at 209 Martin Luther King JR Way, Tacoma, WA, 98405. Phone: (253) 596-3300. Providers update this record themselves, so call before visiting.
How can I verify Mark Gerard O'Callaghan, M.D.'s license?
NPPES lists Washington license number MD00047091, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.