Medicare Enrolled
Dr. Derek Nguyen, MD
Dermatology · Riverside, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Nguyen from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Nguyen
Dr. Derek Nguyen is a dermatology specialist in Riverside, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Nguyen performed 7,209 Medicare services in 2023. These records do not provide a deduplicated patient total.
Between the years covered by Open Payments, Dr. Nguyen received a total of $4,942 from 45 pharmaceutical and/or device companies across 311 payment records. A record can group multiple payments. These transfers are publicly reported through CMS Open Payments. Disclosure alone does not establish their effect on care. A reliable breakdown by payment category is not available in this snapshot. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Nguyen is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 20 years of NPI registration
▲ Top 15% volume in CA
$4,942 industry payments
Medicare Practice Summary — 2023
Medicare Utilization ↗7,209
Medicare services
Top 15% in CA for dermatology
Not available
Unique patients (not deduplicated)
$95
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Nursing facility visit, moderate complexity A follow-up visit by a healthcare provider at a nursing facility for an established patient. The visit involves moderate medical decision making and takes at least 30 minutes. |
2,730 | $88 | $345 |
| Nursing facility visit, high complexity A follow-up visit by a healthcare provider at a nursing facility for an established patient. The visit involves a high level of medical decision making and takes at least 45 minutes. |
1,195 | $124 | $420 |
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
858 | $98 | $320 |
| Advance care planning consultation, first 30 min A session focused on discussing and documenting future healthcare preferences and goals. This service covers the initial 30 minutes of the planning discussion. |
450 | $61 | $259 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
368 | $99 | $409 |
| 2-day continuous ECG with professional review A two-day continuous electrocardiogram recording that includes a review by a healthcare professional. |
246 | $15 | $91 |
| Initial nursing facility care, high complexity An initial visit by a healthcare provider to a patient in a nursing facility involving a high level of medical decision making, lasting at least 45 minutes. |
202 | $147 | $515 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
175 | $142 | $508 |
| Hospital discharge management, 30+ min This service covers the care provided by a physician or qualified healthcare professional on the day a patient is discharged from the hospital. It requires more than 30 minutes of total time spent on the day of discharge. |
152 | $95 | $340 |
| Home visit, established patient, moderate complexity A home visit for an established patient involving moderate medical decision making. The visit requires at least 40 minutes of time if time is used to determine the level of service. |
99 | $105 | $467 |
| Nursing facility discharge management, more than 30 minutes This service involves care coordination and management activities performed by a healthcare professional to prepare a patient for discharge from a nursing facility. It requires more than 30 minutes of time spent on these activities. |
88 | $107 | $287 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
84 | $146 | $544 |
| Chronic care management, first 20 min/month This service covers the first 20 minutes of clinical staff time directed by a healthcare professional each calendar month to manage chronic conditions. |
75 | $51 | $182 |
| Home visit, established patient, low complexity A physician visits an existing patient at their residence to provide care involving a low level of medical decision making. The visit lasts at least 30 minutes. |
72 | $62 | $356 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
46 | $74 | $280 |
| Home visit, established patient, high complexity A home visit for an established patient involving high-level medical decision making, lasting at least 60 minutes. |
43 | $154 | $466 |
| Influenza vaccine, quadrivalent, 0.5 ml dosage | 39 | $20 | $48 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
38 | $32 | $40 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
37 | $126 | $144 |
| Transitional care management, high complexity Coordination of care for a patient transitioning from a short-term hospital stay or other facility to home or another care setting. This service addresses a high-complexity medical problem. |
35 | $231 | $880 |
| Telephone medical discussion, 21-30 minutes A telephone conversation with a physician lasting between 21 and 30 minutes. This code covers the time spent discussing medical matters over the phone. |
25 | $71 | $320 |
| Home health plan of care certification Certification by a physician or allowed practitioner for Medicare-covered home health services under a home health plan of care. This includes contacting the home health agency and reviewing reports of patient status required by physicians. |
23 | $44 | $173 |
| Destruction of skin growths (warts/lesions), 1-14 This procedure involves the removal or destruction of one to fourteen skin growths. It is a minor surgical intervention performed on the skin surface. |
22 | $98 | $379 |
| Destruction of precancerous skin growth, 1 Removal of a single precancerous skin growth. This procedure destroys abnormal skin cells to prevent them from developing into cancer. |
18 | $56 | $236 |
| New patient office visit, complex (60-74 min) | 16 | $161 | $722 |
| Telephone medical discussion, 11-20 minutes A phone conversation with a physician lasting between 11 and 20 minutes. |
16 | $50 | $200 |
| Home health plan of care re-certification A physician reviews the patient's status and contacts the home health agency to re-certify the plan of care without the patient being present. |
16 | $31 | $130 |
| Destruction of precancerous skin growths, 2-14 This procedure involves the removal or destruction of two to fourteen precancerous skin lesions. It is performed to eliminate abnormal skin cells that have the potential to develop into cancer. |
15 | $6 | $196 |
| Home visit, established patient, straightforward decision making A home visit for an established patient involving straightforward medical decision making. The visit lasts at least 15 minutes when time is used to determine the level of service. |
15 | $37 | $300 |
| New patient office visit (45-59 min) An initial office visit for a new patient lasting between 45 and 59 minutes. This code covers the total time spent by the physician or qualified healthcare professional on the date of the encounter. |
11 | $126 | $575 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. These counts do not measure clinical quality or years of experience.
Industry Payment Transparency
Open Payments through 2024 ↗$4,942
Total received (2018-2024)
Avg $706/year across 7 years
Top 29% in CA for dermatology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
45
Companies
311
Payment records
Payments are publicly reported; disclosure does not establish legality · Not evidence of wrongdoing · How to interpret →
Payment categories are unavailable while the source breakdown is being rebuilt. Company and year totals do not identify how much belongs to each category.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$778
2023
$785
2022
$448
2021
$545
2020
$360
2019
$786
2018
$1,241
Payments by company (2024)
AstraZeneca Pharmaceuticals LP
$229
Janssen Pharmaceuticals, Inc
$109
Exact Sciences Corporation
$75
Lundbeck LLC
$59
Novo Nordisk Inc
$57
ABBVIE INC.
$43
Otsuka America Pharmaceutical, Inc.
$41
Novartis Pharmaceuticals Corporation
$38
Boehringer Ingelheim Pharmaceuticals, Inc.
$34
Amgen Inc.
$30
Paratek Pharmaceuticals, Inc.
$19
SCILEX PHARMACEUTICALS INC.
$17
CeQur Corporation
$14
Teva Pharmaceuticals USA, Inc.
$14
Top 3 companies account for 53.0% of 2024 payments
All-time payments by company (2018-2024) ›
AstraZeneca Pharmaceuticals LP
$896
Novo Nordisk Inc
$525
Janssen Pharmaceuticals, Inc
$489
GlaxoSmithKline, LLC.
$311
Novartis Pharmaceuticals Corporation
$262
ABBVIE INC.
$255
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$198
Takeda Pharmaceuticals U.S.A., Inc.
$189
E.R. Squibb & Sons, L.L.C.
$175
Boehringer Ingelheim Pharmaceuticals, Inc.
$151
PFIZER INC.
$148
Allergan, Inc.
$107
Lundbeck LLC
$102
COMSORT, Inc
$100
Exact Sciences Corporation
$95
Otsuka America Pharmaceutical, Inc.
$94
AbbVie Inc.
$88
Abbott Laboratories
$73
SANOFI-AVENTIS U.S. LLC
$68
Allergan Inc.
$62
Bayer HealthCare Pharmaceuticals Inc.
$50
Synergy Pharmaceuticals Inc
$38
NESTLE HEALTHCARE NUTRITION INC.
$35
Mylan Specialty L.P.
$34
Sunovion Pharmaceuticals Inc.
$33
Amgen Inc.
$30
DEXCOM, INC.
$29
Eisai Inc.
$26
Biogen, Inc.
$24
Bayer Healthcare LLC
$24
Astellas Pharma US Inc
$20
Paratek Pharmaceuticals, Inc.
$19
Nevro Corp.
$19
Bayer Healthcare Pharmaceuticals Inc.
$18
SCILEX PHARMACEUTICALS INC.
$17
Genentech USA, Inc.
$14
Currax Pharmaceuticals LLC
$14
Melinta Therapeutics, Inc.
$14
Melinta Therapeutics, LLC
$14
CeQur Corporation
$14
Teva Pharmaceuticals USA, Inc.
$14
Scilex Pharmaceuticals Inc.
$14
BOSTON SCIENTIFIC CORPORATION
$14
Lilly USA, LLC
$13
VIVUS, Inc.
$12
Top 3 companies account for 38.7% of all-time payments
Associated products mentioned in payments ›
ADUHELM · ADVAIR · AIRSUPRA · ANORO · ANORO ELLIPTA · APTIOM · AREXVY · Amitiza · Austedo XR · BOTOX · BOTOX COSMETIC · BREO · BREZTRI · BRILINTA · BYSTOLIC · CHANTIX · COLOGUARD DNA CAPTURE REAGENTS · CONTRAVE · CeQur Simplicity · Cologuard Collection Kit · DEXCOM G6 TRANSMITTER · Dayvigo · ELIQUIS · ENTRESTO · FARXIGA · FREESTYLE LIBRE 2 · FreeStyle Libre · FreeStyle Libre 2 · FreeStyle Libre blood glucose Flash Monitoring System · GENERAL PAIN MANAGEMENT · INVOKANA · JARDIANCE · Kerendia · LATUDA · LEQVIO · LOKELMA · LYRICA · MEDRAD Stellant CT Injection System · NUZYRA · Omnia · Orbactiv · Otezla · Ozempic · PANCREAZE · QULIPTA · REXULTI · RYBELSUS · Rybelsus · SAMSCA · SHINGRIX · SIVEXTRO · SPIRIVA RESPIMAT · STIOLTO RESPIMAT · SYMBICORT · TEFLARO · TOUJEO · TRELEGY ELLIPTA · TRINTELLIX · TRULICITY · Tresiba · Trintellix · Trulance · UBRELVY · VESICARE · VIIBRYD · VOWST · Verquvo · Victoza · XARELTO · XIFAXAN · Xofluza · Yupelri · ZTLido · ZTLido 30 POUCH in 1 CARTON 1 PATCH in 1 POUCH
Should you be concerned? Industry payments are disclosed through CMS Open Payments. Disclosure alone does not establish their purpose, legality, or effect on care. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Geographic Context
Dermatologists in nearby ZIP areas
62
County median income
$89,672
Nearest hospital to ZIP centroid (approximate)
RIVERSIDE COMMUNITY HOSPITAL
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | NPPES snapshot; verify current record |
| Medicare Enrollment | ✓ PECOS | PECOS snapshot |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not included | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Nguyen is a clinical cardiology specialist, with above-average Medicare volume (top 15% in CA), with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Nguyen experienced with nursing facility visit, moderate complexity?
Based on Medicare claims data, Dr. Nguyen performed 2,730 nursing facility visit, moderate complexity services. These records cover Medicare fee-for-service activity, including eligible younger beneficiaries; they do not measure total practice volume or clinical quality.
Does Dr. Nguyen receive payments from pharmaceutical companies?
Yes. Dr. Nguyen received a total of $4,942 from 45 companies across 311 payment records. A record can group multiple payments. These transfers are publicly disclosed through CMS Open Payments. Disclosure alone does not establish their legality or effect on care. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Nguyen's costs compare to other dermatologists in Riverside?
Dr. Nguyen's average Medicare payment per service is $95. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Nguyen) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating the presence of registry, enrollment, activity or payment records, not verified experience or clinical quality. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Source publication dates and the snapshots loaded on this site can differ. Rebuilding a page does not refresh its source records. Check the Medicare reporting year and the payment interval shown above; consult the linked official sources for newer releases and current registry details. See our data freshness policy →
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About this page
This page combines public CMS records with calculated summaries and explanatory procedure labels. These transformations are not verbatim federal records. Sources: NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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