John James Hollowed, MD
Interventional Cardiology Physician · Laguna Hills, CA
John James Hollowed, MD is an interventional cardiology physician with a practice address in Laguna Hills, California, and NPI 1891115572, issued on Apr 22, 2014. Check the license (California A142140, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John James Hollowed
- Credential
- MD
- Primary taxonomy
- Interventional Cardiology Physician 207RI0011X
- License number
- A142140 CA
Self-reported in NPPES; status is on the state search - Practice location
- 24022 Calle DE LA Plata Ste 500, Laguna Hills, CA 92653
- Phone
- (714) 389-1843
- Enumerated
- Apr 22, 2014
- Record last updated
- May 18, 2026
- Fax
- (714) 445-0245
- Medicare enrollment
- Enrolled (PECOS I20210407002311); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 2014
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest interventional cardiology physician records → All 632 in California → Look up another NPI →
Also registered at 24022 Calle DE LA Plata Ste 500
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cheng-Han Chen, M.D., PH.D.Interventional Cardiology Physician1215181722
- Christopher ChenClinical Cardiac Electrophysiology Physician1700312840
- Khyati Pandya, M.D.Pediatric Cardiology Physician1982803524
- George Tadros, M.D.Interventional Cardiology Physician1588623144
Verify John James Hollowed in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A142140Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average interventional cardiology physician in 2024
1,410 Medicare Part D claims for 314 beneficiaries, against an average of 3,179 among the 6,605 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Metoprolol Succinate170 claims
- Atorvastatin Calcium155 claims
- Rosuvastatin Calcium111 claims
- Amlodipine Besylate101 claims
- Eliquis87 claims
- Ezetimibe82 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 86.1 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).
Industry payments in 2024: $370.12
4 payments; by number, the most common kind was food and beverage; the largest payer was ShockWave Medical, Inc. The 6,394 providers of this specialty with any payment received $7,062.29 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
- The Regents OF The University OF CaliforniaSanta Monica, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John James Hollowed among 632 interventional cardiology physician records in California
John James Hollowed, MD is one of 632 interventional cardiology physician records with a practice address in California. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2014, is newer than 84% of them.
- NPI issued2014 · 84% of these records are older, 12% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 83% of these records are
- Graduated2014 · median 2001 among the 526 with a school on file
- Record last updated2026 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RI0011X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Interventional Cardiology Physician providers in California
There are 632 interventional cardiology physician records in California.
All 632 in California → Every provider in Laguna Hills → Interventional Cardiology Physician nationwide →
The 8 interventional cardiology physician records with the nearest ZIP codes
- Amarpal Chana, M.D.Laguna Hills, CA 926531669763447
- Cheng-Han Chen, M.D., PH.D.Laguna Hills, CA 926531215181722
- Milan Patel, M.D.Laguna Hills, CA 926531952447476
- Ramin Rabbani, MDLaguna Hills, CA 926531518962539
- George Tadros, M.D.Laguna Hills, CA 926531588623144
- Hohai Van, MDLaguna Hills, CA 926531780761965
- Daniel Walters, MDLaguna Hills, CA 926531659665461
- Richard Caso, M.D.Aliso Viejo, CA 926561407822141
Common questions
What is John James Hollowed, MD's NPI number?
John James Hollowed, MD's National Provider Identifier (NPI) is 1891115572, issued on Apr 22, 2014. An NPI identifies a provider in billing; it is not a license.
Where is John James Hollowed, MD located?
The NPPES record lists a practice address at 24022 Calle DE LA Plata Ste 500, Laguna Hills, CA, 92653. Phone: (714) 389-1843. Providers update this record themselves, so call before visiting.
How can I verify John James Hollowed, MD's license?
NPPES lists California license number A142140, 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.
How much does John James Hollowed, MD prescribe under Medicare Part D?
In 2024, John James Hollowed, MD had 1,410 Medicare Part D claims for 314 beneficiaries; the average among interventional cardiology physician prescribers was 3,179. Part D covers Medicare prescriptions only.
What is John James Hollowed, MD's MIPS final score?
The 2023 MIPS final score is 86.1 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.