2026 NPPES data Ophthalmology Physician NPI 1942281134
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AUDREY CHAN

Ophthalmology Physician in WEST YARMOUTH, Massachusetts. 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
2K
Medicare Part D claims · 804 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
43%
generic claims · 57% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$243.17
7 payments · CMS Open Payments (Sunshine Act)

What the federal data shows

AUDREY CHAN filed 2,382 Medicare Part D claims in 2023 as a Ophthalmology Physician in WEST YARMOUTH, Massachusetts, prescribing 43% generic.

2K
Part D claims, 2023
43%
generic prescribing
Likely
board-certified (heuristic)

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.

AUDREY CHAN's Medicare Part D volume vs every U.S. prescriber

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

2,382 Top 14% higher than 86% 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%). Below this entry. 800–1,000: 40,919 prescribers (3%). Below this entry. 1,000–1,200: 31,827 prescribers (2%). Below this entry. 1,200–1,400: 26,224 prescribers (2%). Below this entry. 1,400–1,600: 21,710 prescribers (2%). Below this entry. 1,600–1,800: 19,072 prescribers (1%). Below this entry. 1,800–2,000: 16,451 prescribers (1%). Below this entry. 2,000–2,200: 213,991 prescribers (16%). This entry sits in this band. 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 certification likely (heuristic — not verified)

AUDREY CHAN practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation — signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).

What does the federal data show about AUDREY CHAN?

Quality data not reported

NPI registry status

Active

Issued 11/07/2005

NPI 1942281134

Primary specialty

Ophthalmology Physician

Mid-sized

22,090 US NPIs in this specialty

Medicare Part D claims

2,382 68% vs specialty avg

2023 prescription claims

Specialty avg: 1,420

Specialty distribution in Massachusetts

How Ophthalmology Physician compares to other specialties among Massachusetts providers

Massachusetts providers

Ophthalmology Physician share within Massachusetts

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

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).

AUDREY CHAN is a Ophthalmology Physician provider practicing in WEST YARMOUTH, Massachusetts, according to the CMS National Plan and Provider Enumeration System (NPPES). NPI: 1942281134. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

AUDREY CHAN appears in the CMS NPPES registry as a Ophthalmology Physician provider at 88 ANSEL HALLET RD, WEST YARMOUTH, MA, 02673, with a listed phone of (508) 771-4848. NPI 1942281134 was issued on 11/07/2005. 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 2,382 prescription claims written by this provider, covering 804 Medicare beneficiaries and totaling roughly $798K in drug spend, split 57% brand-name and 43% 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

88 ANSEL HALLET RD
WEST YARMOUTH, MA 02673

Provider Details

NPI 1942281134
Specialty Ophthalmology Physician
Gender Female
NPI Issued 11/07/2005

Hospital and facility affiliations

Facilities where AUDREY CHAN 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.

OPHTHALMIC CONSULTANTS OF BOSTON INC
WEST YARMOUTH, MA

Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).

Industry payments received (2024) — CMS Open Payments transparency data

The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for AUDREY CHAN. Source: openpaymentsdata.cms.gov.

Total received

$243

Largest payer

RxSight Inc

Most common payment type

Food and Beverage

Industry payments are not necessarily indicators of bias — they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.

License & disciplinary context — Massachusetts BORIM 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 ~38K Massachusetts medical licensees in 2023 — they are NOT specific to AUDREY CHAN. To verify AUDREY CHAN's current license status, search the BORIM public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.

80
Total board actions, Massachusetts 2023
Across 78 cases
2.11
Actions per 1,000 licensees
Massachusetts statewide rate
probation
Most common action type
29 cases

BORIM 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 Massachusetts disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.

Brand vs generic prescribing mix · Brand-heavy

AUDREY CHAN — brand share 57.0%
Specialty average (est.)

57% brand-name claims vs 43% generic, on 2,382 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.

2,382
Total Claims
$798K
Total Drug Cost
804
Medicare Beneficiaries

Prescribing Breakdown

30-Day Fills
3,733
Total Day Supply
97,829
Brand vs Generic
57% brand / 43% generic
Brand Drug Cost
$746K
Generic Drug Cost
$52K
Antibiotic Claims
44

Patient Demographics

Average Patient Age
76.2 years
Avg HCC Risk Score
1.02
Gender Split
72% female / 28% male
Age Distribution
<65: 28, 65-74: 310, 75-84: 353, 85+: 113

Top Prescribed Drugs (Medicare Part D)

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

Drug Claims
Prednisolone Acetate
500
Moxifloxacin
Moxifloxacin Hcl
322
Restasis
Cyclosporine
295
Xiidra
Lifitegrast
123
Erythromycin
Erythromycin Base
114
Valacyclovir
Valacyclovir Hcl
105
Ketorolac Tromethamine
102
Neomycin-Polymyxin-Dexameth
Neomycin/Polymyxin B/Dexametha
81
Latanoprost
76
Cyclosporine
69

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

Ophthalmology Physician Overview

How AUDREY CHAN 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

AUDREY CHAN's 2,382 claims are above the specialty average of 1,420.

Nearby Ophthalmology Physician Providers in Massachusetts

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

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

Frequently Asked Questions

What is AUDREY CHAN's specialty?
AUDREY CHAN specializes in Ophthalmology Physician and practices in WEST YARMOUTH, Massachusetts.
How much does AUDREY CHAN prescribe under Medicare Part D?
In 2023, AUDREY CHAN wrote 2,382 Medicare Part D claims totaling $798K in drug costs for 804 beneficiaries.
Where is AUDREY CHAN located?
AUDREY CHAN is located at 88 ANSEL HALLET RD, WEST YARMOUTH, MA, 02673. Phone: (508) 771-4848.
What is AUDREY CHAN's NPI number?
AUDREY CHAN's National Provider Identifier (NPI) is 1942281134, issued on 11/07/2005.
Does AUDREY CHAN prescribe more brand-name or generic drugs?
AUDREY CHAN's prescribing is 57% brand-name and 43% generic drugs by claim count, with $746K 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 AUDREY CHAN prescribe most often?
Based on 2023 Medicare Part D data, AUDREY CHAN's most frequently prescribed drugs include Prednisolone Acetate, Moxifloxacin, Restasis. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does AUDREY CHAN accept Medicare?
AUDREY CHAN appears in CMS Medicare data with 2,382 Part D claims and 804 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify AUDREY CHAN's credentials?
AUDREY CHAN's NPI is 1942281134. 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