NPI registry status
Active
2026 NPPES data Otolaryngology Physician NPI 1043205974 M.D., M.P.H.
Verify on CMS → Cathy Chong, M.D., M.P.H.
Otolaryngology Physician in Weymouth, Massachusetts.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 11,060 in Otolaryngology Physician, 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
837
Medicare Part D claims · 232 beneficiaries · Otolaryngology Physician avg: 536
Generic prescribing
98%
generic claims · 2% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$34.49
2 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Cathy Chong, M.D., M.P.H. filed 837 Medicare Part D claims in 2024 as an Otolaryngology Physician in Weymouth, Massachusetts, prescribing 98% generic.
- 837
- Part D claims, 2024
- 98%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥72nd
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Cathy Chong, M.D., M.P.H.
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1043205974), first enumerated 09/16/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 837 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$34.49 in reported industry payments (2 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
Massachusetts statewide board action statistics are published annually — these figures describe aggregate state activity, not Cathy Chong, M.D., M.P.H.'s individual license status. Verify directly with the state medical board.
Source: BORIM annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1043205974 · Otolaryngology Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1043205974
- ENUM-LEGACY 2005
- TAX-MID 11K Otolaryngology Physician
- RX-LIGHT 837
- BOOK-THIN 368 in Massachusetts
- PHOTO-ENUM James Denneny · 2005
Cathy Chong, M.D., M.P.H.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
837 ≥ 72nd percentile 72% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Cathy Chong, M.D., M.P.H. 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 Cathy Chong, M.D., M.P.H.?
Quality data not reportedPrimary specialty
Otolaryngology Physician
Medicare Part D claims
837 56% vs specialty avg
Specialty distribution in Massachusetts
How Otolaryngology Physician compares to other specialties among Massachusetts 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 Otolaryngology Physician. 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).
Practice Address
Provider Details
| NPI | 1043205974 |
|---|---|
| Specialty | Otolaryngology Physician |
| Credentials | M.D., M.P.H. |
| Gender | Female |
| NPI Issued | 09/16/2005 |
Hospital and facility affiliations
Facilities where Cathy Chong, M.D., M.P.H. 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.
Massachusetts Eye And Ear Associates, Inc
Duxbury, 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 Cathy Chong, M.D., M.P.H.. Source: openpaymentsdata.cms.gov.
Total received
$34
Largest payer
Acera Surgical, 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 Cathy Chong, M.D., M.P.H.. To verify Cathy Chong, M.D., M.P.H.'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 · Generic-heavy
Cathy Chong, M.D., M.P.H. - brand share 2.0%
Otolaryngology Physician average
2% brand-name claims vs 98% generic, on 837 2024 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 2024.
837
Total Claims
$19K
Total Drug Cost
232
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,126.7
- Total Day Supply
- 26,739
- Brand vs Generic
- 2% brand / 98% generic
- Brand Drug Cost
- $2K
- Generic Drug Cost
- $17K
- Opioid Claims
- 27 (3.2% rate)
- Antibiotic Claims
- 127
Patient Demographics
- Average Patient Age
- 73.1 years
- Avg HCC Risk Score
- 1.01
- Gender Split
- 61% female / 39% male
- Age Distribution
- <65: 24, 65-74: 104, 75-84: 87, 85+: 17
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Cathy Chong, M.D., M.P.H. prescribes most
Top Medicare Part D drugs by claim count, 2024
- Famotidine
Famotidine
85 claims
- Omeprazole
Omeprazole
78 claims
- Fluticasone Propio…
Fluticasone Propionate
73 claims
- Prednisone
Prednisone
55 claims
- Azelastine Hcl
Azelastine Hcl
39 claims
- Ciprofloxacin-Dexa… 30
Ciprofloxacin-Dexamethasone
30 claims
- Clonazepam 30
Clonazepam
30 claims
- Ipratropium Bromide 28
Ipratropium Bromide
28 claims
| Drug | Claims |
|---|---|
| Famotidine | 85 |
| Omeprazole | 78 |
| Fluticasone Propionate | 73 |
| Prednisone | 55 |
| Azelastine Hcl | 39 |
| Ciprofloxacin-Dexamethasone Ciprofloxacin Hcl/Dexameth | 30 |
| Clonazepam | 30 |
| Ipratropium Bromide | 28 |
| Cefdinir | 24 |
| Mupirocin | 24 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Otolaryngology Physician Overview
How Cathy Chong, M.D., M.P.H. fits within the Otolaryngology Physician landscape nationally.
11,060
Otolaryngology Physician Providers in US
54
States with Otolaryngology Physician
536
Avg Claims per Provider
Cathy Chong, M.D., M.P.H.'s 837 claims are above the specialty average of 536.
Nationwide Otolaryngology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Chong, both outside Massachusetts so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Otolaryngology Physician Providers in Massachusetts
Other clinicians with the same primary specialty enrolled in Massachusetts, drawn from the same CMS NPPES roster as Chong.
One of 368 Otolaryngology Physician providers enrolled in Massachusetts, 5 are shown here.
Dr. Dunia Abdul-Aziz
MD
Boston, MA
Dr. Usama Aboelkheir
MD
Boston, MA
Dr. Nicholas Abt
MD
Mashpee, MA
Dr. Jihad Achkar
M.D.
Boston, MA
Dr. Dara Adams
MD
Boston, MA
Compare Otolaryngology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Cathy Chong, M.D., M.P.H.'s specialty? ▼
Cathy Chong, M.D., M.P.H. specializes in Otolaryngology Physician and practices in Weymouth, Massachusetts. Credentials: M.D., M.P.H..
How much does Cathy Chong, M.D., M.P.H. prescribe under Medicare Part D? ▼
In 2024, Cathy Chong, M.D., M.P.H. wrote 837 Medicare Part D claims totaling $19K in drug costs for 232 beneficiaries.
Where is Cathy Chong, M.D., M.P.H. located? ▼
Cathy Chong, M.D., M.P.H. is located at 825 MAIN ST, Weymouth, MA, 02190. Phone: (781) 337-3424.
What is Cathy Chong, M.D., M.P.H.'s NPI number? ▼
Cathy Chong, M.D., M.P.H.'s National Provider Identifier (NPI) is 1043205974, issued on 09/16/2005.
Does Cathy Chong, M.D., M.P.H. prescribe more brand-name or generic drugs? ▼
Cathy Chong, M.D., M.P.H.'s prescribing is 2% brand-name and 98% generic drugs by claim count, with $2K in brand drug costs.
Does Cathy Chong, M.D., M.P.H. prescribe opioids? ▼
Yes, Cathy Chong, M.D., M.P.H. had 27 opioid claims in 2024 with an opioid prescribing rate of 3.2%.
How many Otolaryngology Physician providers are there in the US? ▼
There are 11,060 Otolaryngology Physician providers across 54 states in the US. The average Otolaryngology Physician provider writes 536 Medicare Part D claims per year.
What drugs does Cathy Chong, M.D., M.P.H. prescribe most often? ▼
Based on 2024 Medicare Part D data, Cathy Chong, M.D., M.P.H.'s most frequently prescribed drugs include Famotidine, Omeprazole, Fluticasone Propionate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Cathy Chong, M.D., M.P.H. accept Medicare? ▼
Cathy Chong, M.D., M.P.H. appears in CMS Medicare data with 837 Part D claims and 232 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Cathy Chong, M.D., M.P.H.'s credentials? ▼
Cathy Chong, M.D., M.P.H.'s NPI is 1043205974 with credentials M.D., M.P.H.. 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.