Grace Shou-En Sun, M.D.
Dermatology Physician · Oxnard, CA
Grace Shou-En Sun, M.D. is a dermatology physician with a practice address in Oxnard, California, and NPI 1396056735, issued on Jun 30, 2010. Check the license (California A124906, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Grace Shou-En Sun
- Credential
- M.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A124906 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2811 N Ventura RD, Oxnard, CA 93036
- Phone
- (805) 983-0343
- Enumerated
- Jun 30, 2010
- Record last updated
- Apr 23, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20140929000533); accepts Medicare assignment
- Medical or professional school
- Baylor College Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 2811 N Ventura RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Andrew Cattano, M.D.Dermatology Physician1861527855
- Victoria Chiu, M.D.Dermatology Physician1982806105
- Jacob Lau, M.D.Dermatology Physician1285769182
- Paul Rehder, M.D.Dermatology Physician1376563445
Verify Grace Shou-En Sun in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A124906Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% more Medicare Part D claims than the average dermatology physician in 2024
1,036 Medicare Part D claims for 302 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Triamcinolone Acetonide128 claims
- Clobetasol Propionate110 claims
- Ketoconazole86 claims
- Hydrocortisone56 claims
- Fluocinonide48 claims
- Fluorouracil43 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: $1,549.11
60 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Biotech, Inc. The 10,250 providers of this specialty with any payment received $8,544.61 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 2 group practices
- Community Memorial Health SystemVentura, CA
- Dermatology Medical Group OF Oxnard And CamarilloOxnard, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Grace Shou-En Sun among 2,083 dermatology physician records in California
Grace Shou-En Sun, M.D. is one of 2,083 dermatology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 64% of them.
- NPI issued2010 · 64% of these records are older, 33% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2009 · median 2006 among the 1,450 with a school on file
- Record last updated2015 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in Oxnard → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Andrew Cattano, M.D.Oxnard, CA 930361861527855
- Victoria Chiu, M.D.Oxnard, CA 930361982806105
- Jacob Lau, M.D.Oxnard, CA 930361285769182
- Paul Rehder, M.D.Oxnard, CA 930361376563445
- Joel Siegel, M.D.Oxnard, CA 930301528056868
- Patricia Walker, M.D. PH.D.Carpinteria, CA 930131619173200
- Lingyun DuCamarillo, CA 930101730541707
- Ross Kaplan, MDCamarillo, CA 930101982600011
Common questions
What is Grace Shou-En Sun, M.D.'s NPI number?
Grace Shou-En Sun, M.D.'s National Provider Identifier (NPI) is 1396056735, issued on Jun 30, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Grace Shou-En Sun, M.D. located?
The NPPES record lists a practice address at 2811 N Ventura RD, Oxnard, CA, 93036. Phone: (805) 983-0343. Providers update this record themselves, so call before visiting.
How can I verify Grace Shou-En Sun, M.D.'s license?
NPPES lists California license number A124906, 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 Grace Shou-En Sun, M.D. prescribe under Medicare Part D?
In 2024, Grace Shou-En Sun, M.D. had 1,036 Medicare Part D claims for 302 beneficiaries; the average among dermatology physician prescribers was 797. 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.