Brian John O'Loughlin, M.D.
Diagnostic Radiology Physician · San Diego, CA
Brian John O'Loughlin, M.D. is a diagnostic radiology physician with a practice address in San Diego, California, and NPI 1972709087, issued on Jun 25, 2007. Check the license (California A120064, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Brian John O'Loughlin
- Credential
- M.D.
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- A120064 CA
Self-reported in NPPES; status is on the state search - Practice location
- 150 W Washington St, San Diego, CA 92103
- Phone
- (619) 295-9729
- Enumerated
- Jun 25, 2007
- Record last updated
- Apr 12, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicaid IDs
- 1972709087 CA
0A1200640 CA - Medicare enrollment
- Enrolled (PECOS I20120615000112); accepts Medicare assignment
- Entity
- Type 1 · individual
Also registered at 150 W Washington St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Gregory Anderson, MDDiagnostic Radiology Physician1841467099
- Lori Baker, M.D.Diagnostic Radiology Physician1063465219
- Michael Booker, M.D.Diagnostic Radiology Physician1669890588
- David Buckley, M.D.Diagnostic Radiology Physician1982657060
- Christine Chen, MDVascular & Interventional Radiology Physician1710243696
- Eric Chou, M.D.Diagnostic Radiology Physician1689627838
Verify Brian John O'Loughlin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A120064Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Ihs Radiology Medical Group IncSan Diego, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Diagnostic Radiology Physician providers in California
There are 4,500 diagnostic radiology physician records in California.
Other diagnostic radiology physician records in California
- Jason Aaronson, MDLos Angeles, CA1023145463
- Brianna Abadie, M.D.Van Nuys, CA1861811291
- Kenric Aban, M.D.Oceanside, CA1336218023
- Pablo Abbona, MDLos Angeles, CA1689856239
- Rashed AbdelaalRiverside, CA1518726090
- Ahmed Abdelhalim, MDRiverside, CA1275162927
- Fatemeh Abdollahi Mofakham, MDLos Angeles, CA1659652915
- Bennett Abe, MDVisalia, CA1184731283
- Stephen Abedon, M.D.Daly City, CA1689628687
- Richard Abello, M.D.La Jolla, CA1245205996
Common questions
What is Brian John O'Loughlin, M.D.'s NPI number?
Brian John O'Loughlin, M.D.'s National Provider Identifier (NPI) is 1972709087, issued on Jun 25, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Brian John O'Loughlin, M.D. located?
The NPPES record lists a practice address at 150 W Washington St, San Diego, CA, 92103. Phone: (619) 295-9729. Providers update this record themselves, so call before visiting.
How can I verify Brian John O'Loughlin, M.D.'s license?
NPPES lists California license number A120064, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Brian John O'Loughlin, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.