NPI registry status
Active
2026 NPPES data Ph.D. Medical Genetics NPI 1962614768
Verify on CMS → Denis Chan
Ph.D. Medical Genetics in Waipahu, Hawaii.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 357 in Ph.D. Medical Genetics, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
665
Medicare Part D claims · 45 beneficiaries · Ph.D. Medical Genetics avg: 984
Generic prescribing
90%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Denis Chan filed 665 Medicare Part D claims in 2023 as a Ph.D. Medical Genetics in Waipahu, Hawaii, prescribing 90% generic.
- 665
- Part D claims, 2023
- 90%
- generic prescribing
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Denis Chan's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
665 Top 31% higher than 69% of 1,370,886 prescribers
Each bar is a band; taller bars hold more prescribers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Medicare Part D Prescriber Public Use File · 2023
What does the federal data show about Denis Chan?
Quality data not reportedPrimary specialty
Ph.D. Medical Genetics
Medicare Part D claims
665 32% vs specialty avg
Specialty distribution in Hawaii
How Ph.D. Medical Genetics compares to other specialties among Hawaii providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Ph.D. Medical Genetics. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Denis Chan appears in the CMS NPPES registry as a Ph.D. Medical Genetics provider at 94-748 HIKIMOE ST STE B, Waipahu, HI, 96797, with a listed phone of (808) 671-7155. NPI 1962614768 was issued on 05/04/2007.
Medicare Part D records for calendar year 2023 show 665 prescription claims written by this provider, covering 45 Medicare beneficiaries and totaling roughly $27K in drug spend, split 10% brand-name and 90% generic by claim count.
Ph.D. Medical Genetics is a narrow specialty nationwide, with 357 enrolled providers across 46 states and an average of 984 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1962614768 |
|---|---|
| Specialty | Ph.D. Medical Genetics |
| Gender | Male |
| NPI Issued | 05/04/2007 |
Brand vs generic prescribing mix · Typical
Denis Chan - brand share 10.0%
Ph.D. Medical Genetics average
10% brand-name claims vs 90% generic, on 665 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
665
Total Claims
$27K
Total Drug Cost
45
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,247
- Total Day Supply
- 33,450
- Brand vs Generic
- 10% brand / 90% generic
- Brand Drug Cost
- $12K
- Generic Drug Cost
- $15K
- Antibiotic Claims
- 46
Patient Demographics
- Average Patient Age
- 72.4 years
- Avg HCC Risk Score
- 0.88
- Gender Split
- 40% female / 60% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Denis Chan prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
82 claims
- Amlodipine Besylate
Amlodipine Besylate
70 claims
- Ibuprofen
Ibuprofen
56 claims
- Lisinopril
Lisinopril
35 claims
- Losartan Potassium 32
Losartan Potassium
32 claims
- Albuterol Sulfate … 29
Albuterol Sulfate Hfa
29 claims
- Betamethasone Vale… 29
Betamethasone Valerate
29 claims
- Azithromycin 27
Azithromycin
27 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 82 |
| Amlodipine Besylate | 70 |
| Ibuprofen | 56 |
| Lisinopril | 35 |
| Losartan Potassium | 32 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 29 |
| Betamethasone Valerate | 29 |
| Azithromycin | 27 |
| Metformin Hcl | 26 |
| Metoprolol Succinate | 23 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ph.D. Medical Genetics Overview
How Denis Chan fits within the Ph.D. Medical Genetics landscape nationally.
357
Ph.D. Medical Genetics Providers in US
46
States with Ph.D. Medical Genetics
984
Avg Claims per Provider
Denis Chan's 665 claims are below the specialty average of 984.
Nearby Ph.D. Medical Genetics Providers in Hawaii
Other clinicians with the same primary specialty enrolled in Hawaii, drawn from the same CMS NPPES roster as Chan.
Compare Ph.D. Medical Genetics nationally: see state-by-state distribution →
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Hawaii medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Ph.D. Medical Genetics peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Denis Chan's specialty? ▼
Denis Chan specializes in Ph.D. Medical Genetics and practices in Waipahu, Hawaii.
How much does Denis Chan prescribe under Medicare Part D? ▼
In 2023, Denis Chan wrote 665 Medicare Part D claims totaling $27K in drug costs for 45 beneficiaries.
Where is Denis Chan located? ▼
Denis Chan is located at 94-748 HIKIMOE ST STE B, Waipahu, HI, 96797. Phone: (808) 671-7155.
What is Denis Chan's NPI number? ▼
Denis Chan's National Provider Identifier (NPI) is 1962614768, issued on 05/04/2007.
Does Denis Chan prescribe more brand-name or generic drugs? ▼
Denis Chan's prescribing is 10% brand-name and 90% generic drugs by claim count, with $12K in brand drug costs.
How many Ph.D. Medical Genetics providers are there in the US? ▼
There are 357 Ph.D. Medical Genetics providers across 46 states in the US. The average Ph.D. Medical Genetics provider writes 984 Medicare Part D claims per year.
What drugs does Denis Chan prescribe most often? ▼
Based on 2023 Medicare Part D data, Denis Chan's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Ibuprofen. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Denis Chan accept Medicare? ▼
Denis Chan appears in CMS Medicare data with 665 Part D claims and 45 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Denis Chan's credentials? ▼
Denis Chan's NPI is 1962614768. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.