Mary Sun, M.D.
Emergency Medicine Physician · Torrance, CA
Mary Sun, M.D. is an emergency medicine physician with a practice address in Torrance, California, and NPI 1033352232, issued on Apr 17, 2009. Check the license (California A115556, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary Sun
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- A115556 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3330 Lomita Blvd, Torrance, CA 90505
- Phone
- (310) 717-6381
- Enumerated
- Apr 17, 2009
- Record last updated
- Feb 17, 2016 (not updated in 10 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 3330 Lomita Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Mary Sun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A115556Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% fewer Medicare Part D claims than the average emergency medicine physician in 2024
50 Medicare Part D claims for 38 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen13 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.
Industry payments in 2024: $276.32
2 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 12,335 providers of this specialty with any payment received $953.79 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.
Mary Sun among 7,751 emergency medicine physician records in California
Mary Sun, M.D. is one of 7,751 emergency medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 54% of them.
- NPI issued2009 · 54% of these records are older, 42% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 59% of these records are
- Record last updated2016 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
197 emergency medicine physician records list a practice address in Torrance
They are 197 of the 8,901 NPPES records with a practice address in Torrance, and 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Torrance → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Elisa Anhalt, MDTorrance, CA 905051194773424
- Ellen BakerTorrance, CA 905051588612477
- Michael Baker, MDTorrance, CA 905051922030238
- Darren Bedolla, MDTorrance, CA 905051114956299
- Mark Gellman, DOTorrance, CA 905051669493375
- Robert Gibbs, MDTorrance, CA 905051043326366
- Kane Kuo, M.D.Torrance, CA 905051588600993
- Brett Lorber, MDTorrance, CA 905051225148042
Common questions
What is Mary Sun, M.D.'s NPI number?
Mary Sun, M.D.'s National Provider Identifier (NPI) is 1033352232, issued on Apr 17, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mary Sun, M.D. located?
The NPPES record lists a practice address at 3330 Lomita Blvd, Torrance, CA, 90505. Phone: (310) 717-6381. Providers update this record themselves, so call before visiting.
How can I verify Mary Sun, M.D.'s license?
NPPES lists California license number A115556, 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 Mary Sun, M.D. prescribe under Medicare Part D?
In 2024, Mary Sun, M.D. had 50 Medicare Part D claims for 38 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
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.