Quick answers
- Does Dennis H. Nguyen accept Medicare assignment?
- Yes. Medicare's clinician data says Dennis H. Nguyen accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Dennis H. Nguyen see?
- In 2024, CMS data shows 542 Original Medicare patients and 2,074 services for Dennis H. Nguyen. This counts Original Medicare only and measures volume, not quality.
- What is Dennis H. Nguyen's NPI number?
- 1740482603. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Dennis H. Nguyen, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 542 |
|---|---|
| Services billed to Medicare | 2,074 |
| Different services or procedures | 66 |
| Participating Medicare provider | Yes |
| Average age of these patients | 77 |
Most frequent services
- Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, 1-5 tissue blocks (17311)478 services
- Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, each additional stage, 1-5 tissue blocks (17312)425 services
- Complicated repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet, 2.6-7.5 cm (13132)200 services
- Removal and microscopic exam of growth of trunk, arms, or legs, 1-5 tissue blocks (17313)147 services
- Complicated repair of wound of scalp, arms, or legs, 2.6-7.5 cm (13121)145 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High cholesterol75%
- High blood pressure70%
- Arthritis46%
- Ischemic heart disease25%
- Diabetes22%
- Chronic kidney disease20%
Practice locations
Addresses where Dennis H. Nguyen is enrolled with Medicare (CMS data updated October 2, 2026). The first 5 of 7; the Medicare profile lists all.
- 16960 Bastanchury Rd, Suite IYorba Linda, CA 92886 (714) 524‑9700
- 1820 Fullerton Ave, Suite 360Corona, CA 92881 (951) 270‑4494
- 18800 Main St, Suite 111Huntington Beach, CA 92648 (714) 951‑9119
- 210 S Grand Ave, Suite 208Glendora, CA 91741 (626) 914‑3675
- 245 Fair Oaks AveSouth Pasadena, CA 91030 (626) 333‑7773
Group practices
Medicare enrollment lists Dennis H. Nguyen as a member of these groups (CMS data updated October 2, 2026).
- Island Dermatology, Inc.27 clinicians in the group
- Comprehensive Dermatology of Long Beach PC6 clinicians in the group
- Malcolm Ke MD a Professional Corporation5 clinicians in the group
- Agape Dermatology PC4 clinicians in the group
- Phillip H A Lee MD and Center for Advanced Dermatology4 clinicians in the group
- MPZ Dermatology3 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in Yorba Linda
Clinicians with the same Medicare primary specialty in Yorba Linda, CA — not a recommendation.
Other clinicians in Island Dermatology, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of California, San Francisco School Of Medicine |
| Graduation year | 2004 (22 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1740482603 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians