Catherine Maikhanh Nguyen, MD
Dermatology Physician · Orange, CA
Catherine Maikhanh Nguyen, MD is a dermatology physician with a practice address in Orange, California, and NPI 1295199552, issued on Apr 12, 2016. Check the license (California A168431, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Catherine Maikhanh Nguyen
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- A168431 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2501 E Chapman Ave Ste 407, Orange, CA 92869
- Phone
- (714) 628-3230
- Enumerated
- Apr 12, 2016
- Record last updated
- Nov 9, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20201116003052); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Verify Catherine Maikhanh Nguyen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A168431Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
About as many Medicare Part D claims as the average dermatology physician in 2024
795 Medicare Part D claims for 319 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 7% of claims.
Most prescribed
- Clobetasol Propionate122 claims
- Ketoconazole122 claims
- Triamcinolone Acetonide86 claims
- Fluorouracil76 claims
- Ciclopirox45 claims
- Hydrocortisone44 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: $1,449.54
59 payments; by number, the most common kind was food and beverage; the largest payer was Genzyme Corporation. 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 one group practice
- Providence Medical FoundationFullerton, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Catherine Maikhanh Nguyen among 2,083 dermatology physician records in California
Catherine Maikhanh Nguyen, MD 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 2016, is newer than 80% of them.
- NPI issued2016 · 80% of these records are older, 17% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2016 · median 2006 among the 1,450 with a school on file
- Record last updated2021 · 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 Orange → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Nilanthi Gunawardane, M.D.Orange, CA 928691124351051
- Tanya Nino, M.DOrange, CA 928691194973529
- Elizabeth Cavalier, M.D.Orange, CA 928681932373701
- Sidharth ChandOrange, CA 928681992449466
- Andrew Creadore, MDOrange, CA 928681477139327
- Brooke Cui, MDOrange, CA 928681649706441
- Xiying Fan, MD, PHDOrange, CA 928681447811104
- Allene FonsecaOrange, CA 928681487008025
Common questions
What is Catherine Maikhanh Nguyen, MD's NPI number?
Catherine Maikhanh Nguyen, MD's National Provider Identifier (NPI) is 1295199552, issued on Apr 12, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Maikhanh Nguyen, MD located?
The NPPES record lists a practice address at 2501 E Chapman Ave Ste 407, Orange, CA, 92869. Phone: (714) 628-3230. Providers update this record themselves, so call before visiting.
How can I verify Catherine Maikhanh Nguyen, MD's license?
NPPES lists California license number A168431, 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 Catherine Maikhanh Nguyen, MD prescribe under Medicare Part D?
In 2024, Catherine Maikhanh Nguyen, MD had 795 Medicare Part D claims for 319 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.