Jon Warren Loo, MD
Diagnostic Radiology Physician · Laguna Hills, CA
Jon Warren Loo, MD is a diagnostic radiology physician with a practice address in Laguna Hills, California, and NPI 1871755017, issued on Jun 30, 2008. Check the license (California A123551, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Jon Warren Loo
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License numbers
- A123551 CA
PG167394 OR
Self-reported in NPPES; status is on the state search - Practice location
- 24451 Health Center Dr, Laguna Hills, CA 92653
- Phone
- (949) 452-3573
- Enumerated
- Jun 30, 2008
- Record last updated
- Apr 4, 2025
- Medicaid ID
- 0A1235510 CA
- Medicare enrollment
- Enrolled (PECOS I20130617000354); accepts Medicare assignment
- Medical or professional school
- Medical College Of Wisconsin, 2008
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 4,500 in California → Look up another NPI →
Also registered at 24451 Health Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jessica Alva, R.N.F.A.Registered Nurse First Assistant1265848733
- Jordan Amato, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1154279511
- Dwight Arakaki, M.DEmergency Medicine Physician1376653360
- Saryna Bahadarakhann, RNRegistered Nurse1861775116
- Joshua Bobko, MDEmergency Medicine Physician1235397621
- Brianna Brown, LCSWClinical Social Worker1144982000
Verify Jon Warren Loo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A123551Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $75.43
2 payments; by number, the most common kind was food and beverage; the largest payer was Biosense Webster, Inc. The 8,048 providers of this specialty with any payment received $2,488.38 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Memorialcare Medical FoundationLong Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jon Warren Loo among 4,500 diagnostic radiology physician records in California
Jon Warren Loo, MD is one of 4,500 diagnostic radiology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 59% of them.
- NPI issued2008 · 59% of these records are older, 36% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2008 · median 2004 among the 3,130 with a school on file
- Record last updated2025 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Diagnostic Radiology Physician providers in California
There are 4,500 diagnostic radiology physician records in California.
All 4,500 in California → Every provider in Laguna Hills → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
- Nancy Bucciarelli, M.D.Laguna Hills, CA 926531801948302
- Gretchen Conroy, M.D.Laguna Hills, CA 926531922272103
- William Fields, MDLaguna Hills, CA 926531184781080
- Samantha Kubaska, M.D.Laguna Hills, CA 926531235174111
- Benjamin Lee, M.D.Laguna Hills, CA 926531538299334
- Gary Levine, M.D.Laguna Hills, CA 926531689614224
- Andrew Malatskey, MDLaguna Hills, CA 926531881747756
- Lauralyn Markle, M.D.Laguna Hills, CA 926531396744793
Common questions
What is Jon Warren Loo, MD's NPI number?
Jon Warren Loo, MD's National Provider Identifier (NPI) is 1871755017, issued on Jun 30, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Jon Warren Loo, MD located?
The NPPES record lists a practice address at 24451 Health Center Dr, Laguna Hills, CA, 92653. Phone: (949) 452-3573. Providers update this record themselves, so call before visiting.
How can I verify Jon Warren Loo, MD's license?
NPPES lists California license number A123551, 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 Jon Warren Loo, MD's MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.