2026 NPPES data Ophthalmology Physician NPI 1982661161 M.D.
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STEPHEN CLASON, M.D.

Ophthalmology Physician in HONOLULU, 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
328
Medicare Part D claims · 83 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
46%
generic claims · 54% brand-name · higher generic rates reduce patient out-of-pocket costs

What the federal data shows

STEPHEN CLASON, M.D. filed 328 Medicare Part D claims in 2023 as a Ophthalmology Physician in HONOLULU, Hawaii, prescribing 46% generic.

328
Part D claims, 2023
46%
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.

STEPHEN CLASON, M.D.'s Medicare Part D volume vs every U.S. prescriber

Total Medicare Part D claims, 2023 — across all CMS prescribers nationally

328 Top 43% higher than 57% of 1,370,886 prescribers

0–200: 670,926 prescribers (49%). Below this entry. 200–400: 182,923 prescribers (13%). This entry sits in this band. 400–600: 90,619 prescribers (7%). Above this entry. 600–800: 56,224 prescribers (4%). Above this entry. 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

Board-eligible specialty (heuristic — not verified)

STEPHEN CLASON, M.D. practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about STEPHEN CLASON, M.D.?

Quality data not reported

NPI registry status

Active

Issued 04/30/2006

NPI 1982661161

Primary specialty

Ophthalmology Physician

Mid-sized

22,090 US NPIs in this specialty

Medicare Part D claims

328 77% vs specialty avg

2023 prescription claims

Specialty avg: 1,420

Specialty distribution in Hawaii

How Ophthalmology Physician compares to other specialties among Hawaii providers

Hawaii providers

Ophthalmology Physician share within Hawaii

1. Ophthalmology Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Ophthalmology Physician share within Hawaii

Specialty board-certification context

Estimated specialty board-certified rate — Ophthalmology Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Ophthalmology Physician ABMS/AOA estimate

Est. board-certified rate (Ophthalmology Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Ophthalmology Physician) — 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).

STEPHEN CLASON, M.D. appears in the CMS NPPES registry as a Ophthalmology Physician provider holding M.D. credentials at 615 PIIKOI ST, HONOLULU, HI, 96814, with a listed phone of (808) 591-9393. NPI 1982661161 was issued on 04/30/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CLASON 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 328 prescription claims written by this provider, covering 83 Medicare beneficiaries and totaling roughly $58K in drug spend, split 54% brand-name and 46% 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.

Ophthalmology Physician is a mid-sized specialty nationwide, with 22,090 enrolled providers across 56 states and an average of 1,420 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

615 PIIKOI ST
HONOLULU, HI 96814

Provider Details

NPI 1982661161
Specialty Ophthalmology Physician
Credentials M.D.
Gender Male
NPI Issued 04/30/2006

Brand vs generic prescribing mix · Brand-heavy

STEPHEN CLASON, M.D. — brand share 54.0%
Specialty average (est.)

54% brand-name claims vs 46% generic, on 328 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.

328
Total Claims
$58K
Total Drug Cost
83
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
696
Total Day Supply
19,873
Brand vs Generic
54% brand / 46% generic
Brand Drug Cost
$53K
Generic Drug Cost
$5K

Patient Demographics

Average Patient Age
80.1 years
Avg HCC Risk Score
1.37
Gender Split
49% female / 51% male
Age Distribution
<65: 0, 65-74: 25, 75-84: 30, 85+: 28

Top Prescribed Drugs (Medicare Part D)

Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.

What STEPHEN CLASON, M.D. 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
Latanoprost
95
Timolol Maleate
59
Dorzolamide-Timolol
Dorzolamide Hcl/Timolol Maleat
55
Vyzulta
Latanoprostene Bunod
26
Neomycin-Polymyxin-Dexameth
Neomycin/Polymyxin B/Dexametha
20
Alphagan P
Brimonidine Tartrate
11
Prednisolone Acetate
11

* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.

Ophthalmology Physician Overview

How STEPHEN CLASON, M.D. fits within the Ophthalmology Physician landscape nationally.

22,090
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider

STEPHEN CLASON, M.D.'s 328 claims are below the specialty average of 1,420.

Nearby Ophthalmology Physician Providers in Hawaii

Other clinicians with the same primary specialty enrolled in Hawaii, drawn from the same CMS NPPES roster as CLASON.

Compare Ophthalmology Physician nationally: see state-by-state distribution →

Frequently Asked Questions

What is STEPHEN CLASON, M.D.'s specialty?
STEPHEN CLASON, M.D. specializes in Ophthalmology Physician and practices in HONOLULU, Hawaii. Credentials: M.D..
How much does STEPHEN CLASON, M.D. prescribe under Medicare Part D?
In 2023, STEPHEN CLASON, M.D. wrote 328 Medicare Part D claims totaling $58K in drug costs for 83 beneficiaries.
Where is STEPHEN CLASON, M.D. located?
STEPHEN CLASON, M.D. is located at 615 PIIKOI ST, HONOLULU, HI, 96814. Phone: (808) 591-9393.
What is STEPHEN CLASON, M.D.'s NPI number?
STEPHEN CLASON, M.D.'s National Provider Identifier (NPI) is 1982661161, issued on 04/30/2006.
Does STEPHEN CLASON, M.D. prescribe more brand-name or generic drugs?
STEPHEN CLASON, M.D.'s prescribing is 54% brand-name and 46% generic drugs by claim count, with $53K in brand drug costs.
How many Ophthalmology Physician providers are there in the US?
There are 22,090 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does STEPHEN CLASON, M.D. prescribe most often?
Based on 2023 Medicare Part D data, STEPHEN CLASON, M.D.'s most frequently prescribed drugs include Latanoprost, Timolol Maleate, Dorzolamide-Timolol. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does STEPHEN CLASON, M.D. accept Medicare?
STEPHEN CLASON, M.D. appears in CMS Medicare data with 328 Part D claims and 83 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify STEPHEN CLASON, M.D.'s credentials?
STEPHEN CLASON, M.D.'s NPI is 1982661161 with credentials M.D.. 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