John C. Sun, M.D.
Otolaryngology Physician · Laguna Hills, CA
John C. Sun, M.D. is an otolaryngology physician with a practice address in Laguna Hills, California, and NPI 1578664025, issued on Sep 26, 2006. Check the license (California A78064, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John C. Sun
- Credential
- M.D.
- Primary taxonomy
- Otolaryngology Physician 207Y00000X
- License numbers
- A78064 CA
BS6046901 CA
Self-reported in NPPES; status is on the state search - Practice location
- 24411 Health Center Dr Ste 600, Laguna Hills, CA 92653
- Phone
- (949) 305-8000
- Enumerated
- Sep 26, 2006
- Record last updated
- Aug 16, 2019 (not updated in 7 years: call before relying on the address or phone)
- Fax
- (949) 305-8001
- Medicaid ID
- GR0104480 CA
- Medicare enrollment
- Enrolled (PECOS I20100407000448); accepts Medicare assignment
- Medical or professional school
- Washington University School Of Medicine, 1995
- Entity
- Type 1 · individual
8 nearest otolaryngology physician records → All 1,212 in California → Look up another NPI →
Also registered at 24411 Health Center Dr Ste 600
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Sun, M.D.Otolaryngology Physician1861599193
- Christopher Yian, M.D.Otolaryngology Physician1003913336
Verify John C. Sun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A78064Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
13% more Medicare Part D claims than the average otolaryngology physician in 2024
614 Medicare Part D claims for 276 beneficiaries, against an average of 541 among the 8,339 providers of this specialty who prescribed in Part D. 11 claims were for opioids.
Most prescribed
- Fluticasone Propionate144 claims
- Azelastine Hcl95 claims
- Ipratropium Bromide83 claims
- Mometasone Furoate75 claims
- Montelukast Sodium42 claims
- Ofloxacin32 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.
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: $349.35
17 payments; by number, the most common kind was food and beverage; the largest payer was Genzyme Corporation. The 6,429 providers of this specialty with any payment received $1,922.50 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
- Orange County Ear Nose And ThroatLaguna Hills, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John C. Sun among 1,212 otolaryngology physician records in California
John C. Sun, M.D. is one of 1,212 otolaryngology physician records with a practice address in California. 80% 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 · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1995 · median 2004 among the 818 with a school on file
- Record last updated2019 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Y00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Otolaryngology Physician providers in California
There are 1,212 otolaryngology physician records in California.
All 1,212 in California → Every provider in Laguna Hills → Otolaryngology Physician nationwide →
The 8 otolaryngology physician records with the nearest ZIP codes
- Ashley Balaker, M.D.Laguna Hills, CA 926531427387547
- Scott Roof, M.D.Laguna Hills, CA 926531669867123
- Paul Sun, M.D.Laguna Hills, CA 926531861599193
- Christopher Yian, M.D.Laguna Hills, CA 926531003913336
- Sarah Vakkalanka, MDHuntington Beach, CA 926481427029883
- Sherman Don, MDHuntington Beach, CA 926471316139280
- Nghia Nguyen, M.D.Huntington Beach, CA 926471831194539
- Leslie Bain, MDNewport Beach, CA 926601306906128
Common questions
What is John C. Sun, M.D.'s NPI number?
John C. Sun, M.D.'s National Provider Identifier (NPI) is 1578664025, issued on Sep 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John C. Sun, M.D. located?
The NPPES record lists a practice address at 24411 Health Center Dr Ste 600, Laguna Hills, CA, 92653. Phone: (949) 305-8000. Providers update this record themselves, so call before visiting.
How can I verify John C. Sun, M.D.'s license?
NPPES lists California license number A78064, 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 C. Sun, M.D. prescribe under Medicare Part D?
In 2024, John C. Sun, M.D. had 614 Medicare Part D claims for 276 beneficiaries; the average among otolaryngology physician prescribers was 541. Part D covers Medicare prescriptions only.
What is John C. Sun, M.D.'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.