NPI registry status
Active
2026 NPPES data Optometrist NPI 1003902883 O.D.
Verify on CMS → Henry Chaung, O.D.
Optometrist in New York, New York.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 60,484 in Optometrist, 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
320
Medicare Part D claims · 61 beneficiaries · Optometrist avg: 257
Generic prescribing
29%
generic claims · 71% 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
Henry Chaung, O.D. filed 320 Medicare Part D claims in 2023 as a Optometrist in New York, New York, prescribing 29% generic.
- 320
- Part D claims, 2023
- 29%
- 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.
Henry Chaung, O.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
320 Top 43% higher than 57% 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 Henry Chaung, O.D.?
Quality data not reportedPrimary specialty
Optometrist
Medicare Part D claims
320 25% vs specialty avg
Specialty distribution in New York
How Optometrist compares to other specialties among New York 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 Optometrist. 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).
Henry Chaung, O.D. appears in the CMS NPPES registry as an Optometrist provider holding O.D. credentials at 153A HESTER ST, New York, NY, 10013, with a listed phone of (212) 431-8446. NPI 1003902883 was issued on 10/05/2006.
Medicare Part D records for calendar year 2023 show 320 prescription claims written by this provider, covering 61 Medicare beneficiaries and totaling roughly $166K in drug spend, split 71% brand-name and 29% generic by claim count.
Optometrist is a high-volume specialty nationwide, with 60,484 enrolled providers across 56 states and an average of 257 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 | 1003902883 |
|---|---|
| Specialty | Optometrist |
| Credentials | O.D. |
| Gender | Male |
| NPI Issued | 10/05/2006 |
Hospital and facility affiliations
Facilities where Henry Chaung, O.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Physician Affiliate Group OF New York PC
New York, NY
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
License & disciplinary context - New York NYSBPMC 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~100K New York medical licensees in 2023 - they are NOT specific to Henry Chaung, O.D.. To verify Henry Chaung, O.D.'s current license status, search the NYSBPMC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
312
Total board actions, New York 2023
Across 302 cases
3.12
Actions per 1,000 licensees
New York statewide rate
probation
Most common action type
89 cases
NYSBPMC publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the New York disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Brand-heavy
Henry Chaung, O.D. - brand share 71.0%
Optometrist average
71% brand-name claims vs 29% generic, on 320 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.
320
Total Claims
$166K
Total Drug Cost
61
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 434
- Total Day Supply
- 12,632
- Brand vs Generic
- 71% brand / 29% generic
- Brand Drug Cost
- $163K
- Generic Drug Cost
- $4K
Patient Demographics
- Average Patient Age
- 74.2 years
- Avg HCC Risk Score
- 1.29
- Gender Split
- 57% female / 43% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Henry Chaung, O.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Restasis
Restasis
130 claims
- Bepotastine Besilate 34
Bepotastine Besilate
34 claims
- Lumigan 32
Lumigan
32 claims
- Olopatadine Hcl 29
Olopatadine Hcl
29 claims
- Dorzolamide-Timolol 13
Dorzolamide-Timolol
13 claims
- Latanoprost 13
Latanoprost
13 claims
- Azelastine Hcl 12
Azelastine Hcl
12 claims
| Drug | Claims |
|---|---|
| Restasis Cyclosporine | 130 |
| Bepotastine Besilate | 34 |
| Lumigan Bimatoprost | 32 |
| Olopatadine Hcl | 29 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 13 |
| Latanoprost | 13 |
| Azelastine Hcl | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Optometrist Overview
How Henry Chaung, O.D. fits within the Optometrist landscape nationally.
60,484
Optometrist Providers in US
56
States with Optometrist
257
Avg Claims per Provider
Henry Chaung, O.D.'s 320 claims are above the specialty average of 257.
Nearby Optometrist Providers in New York
Other clinicians with the same primary specialty enrolled in New York, drawn from the same CMS NPPES roster as Chaung.
Dr. Annmary Abadir
O.D.
Harrison, NY
Dr. Edita Abazaga
OD
Syracuse, NY
Dr. Mirjeta Abazaga
O.D.
Syracuse, NY
Dr. Syeda Abbas
OD
White Plains, NY
Dr. Thomas Abbott
O.D.
Horseheads, NY
Compare Optometrist 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 New York medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Optometrist 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 Henry Chaung, O.D.'s specialty? ▼
Henry Chaung, O.D. specializes in Optometrist and practices in New York, New York. Credentials: O.D..
How much does Henry Chaung, O.D. prescribe under Medicare Part D? ▼
In 2023, Henry Chaung, O.D. wrote 320 Medicare Part D claims totaling $166K in drug costs for 61 beneficiaries.
Where is Henry Chaung, O.D. located? ▼
Henry Chaung, O.D. is located at 153A HESTER ST, New York, NY, 10013. Phone: (212) 431-8446.
What is Henry Chaung, O.D.'s NPI number? ▼
Henry Chaung, O.D.'s National Provider Identifier (NPI) is 1003902883, issued on 10/05/2006.
Does Henry Chaung, O.D. prescribe more brand-name or generic drugs? ▼
Henry Chaung, O.D.'s prescribing is 71% brand-name and 29% generic drugs by claim count, with $163K in brand drug costs.
How many Optometrist providers are there in the US? ▼
There are 60,484 Optometrist providers across 56 states in the US. The average Optometrist provider writes 257 Medicare Part D claims per year.
What drugs does Henry Chaung, O.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Henry Chaung, O.D.'s most frequently prescribed drugs include Restasis, Bepotastine Besilate, Lumigan. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Henry Chaung, O.D. accept Medicare? ▼
Henry Chaung, O.D. appears in CMS Medicare data with 320 Part D claims and 61 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Henry Chaung, O.D.'s credentials? ▼
Henry Chaung, O.D.'s NPI is 1003902883 with credentials O.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
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.