2026 NPPES data Ph.D. Medical Genetics NPI 1962614768
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DENIS CHAN

Ph.D. Medical Genetics in WAIPAHU, Hawaii. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
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

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

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). Below this entry. 400–600: 90,619 prescribers (7%). Below this entry. 600–800: 56,224 prescribers (4%). This entry sits in this band. 800–1,000: 40,919 prescribers (3%). Above this entry. 1,000–1,200: 31,827 prescribers (2%). Above this entry. 1,200–1,400: 26,224 prescribers (2%). Above this entry. 1,400–1,600: 21,710 prescribers (2%). Above this entry. 1,600–1,800: 19,072 prescribers (1%). Above this entry. 1,800–2,000: 16,451 prescribers (1%). Above this entry. 2,000–2,200: 213,991 prescribers (16%). Above this entry. This provider 0 2K+ every Part D prescriber (claims/yr), bucketed by value

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 reported

NPI registry status

Active

Issued 05/04/2007

NPI 1962614768

Primary specialty

Ph.D. Medical Genetics

Rare

357 US NPIs in this specialty

Medicare Part D claims

665 32% vs specialty avg

2023 prescription claims

Specialty avg: 984

Specialty distribution in Hawaii

How Ph.D. Medical Genetics compares to other specialties among Hawaii providers

Hawaii providers

Ph.D. Medical Genetics share within Hawaii

1. Ph.D. Medical Genetics42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Ph.D. Medical Genetics share within Hawaii

Specialty board-certification context

Estimated specialty board-certified rate — Ph.D. Medical Genetics (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Ph.D. Medical Genetics ABMS/AOA estimate

Est. board-certified rate (Ph.D. Medical Genetics) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Ph.D. Medical Genetics) — ABMS / AOA estimate

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. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CHAN most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

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. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

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

94-748 HIKIMOE ST STE B
WAIPAHU, HI 96797

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%
Specialty average (est.)

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

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
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 →

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

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