NPI registry status
Active
2026 NPPES data Allergy & Immunology (Internal Medicine) Physician NPI 1689753105 MD
Verify on CMS → Huy Dang, MD
Allergy & Immunology (Internal Medicine) Physician in Massillon, Ohio.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 517 in Allergy & Immunology (Internal Medicine) 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
585
Medicare Part D claims · 192 beneficiaries · Allergy & Immunology (Internal Medicine) Physician avg: 798
Generic prescribing
82%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$59.18
3 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Huy Dang, MD filed 585 Medicare Part D claims in 2023 as an Allergy & Immunology (Internal Medicine) Physician in Massillon, Ohio, prescribing 82% generic.
- 585
- Part D claims, 2023
- 82%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥66th
- 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 Huy Dang, MD
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 1689753105), first enumerated 11/03/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 585 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
$59.18 in reported industry payments (3 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
Ohio statewide board action statistics are published annually — these figures describe aggregate state activity, not Huy Dang, MD's individual license status. Verify directly with the state medical board.
Source: OMB 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 1689753105 · Allergy & Immunology (Internal Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1689753105
- ENUM-LEGACY 2006
- TAX-NARROW 517
- RX-LIGHT 585
- BOOK-THIN 13 in Ohio
- PHOTO-ENUM Sylvette Nazario · 2006
Huy Dang, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
585 ≥ 66th percentile 66% of 1,370,886 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 · 2023
✓
Board certification likely (heuristic, not verified)
Huy Dang, MD 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 Huy Dang, MD?
Quality data not reportedPrimary specialty
Allergy & Immunology (Internal Medicine) Physician
Medicare Part D claims
585 27% vs specialty avg
Specialty distribution in Ohio
How Allergy & Immunology (Internal Medicine) Physician compares to other specialties among Ohio 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 Allergy & Immunology (Internal Medicine) 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 | 1689753105 |
|---|---|
| Specialty | Allergy & Immunology (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/03/2006 |
Hospital and facility affiliations
Facilities where Huy Dang, MD 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.
Usacs Integrated Acute Care Services OF Ohio LLC
Akron, OH
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 Huy Dang, MD. Source: openpaymentsdata.cms.gov.
Total received
$59
Largest payer
PFIZER 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 - Ohio OMB 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 ~48K Ohio medical licensees in 2023 - they are NOT specific to Huy Dang, MD. To verify Huy Dang, MD's current license status, search the OMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
158
Total board actions, Ohio 2023
Across 154 cases
3.29
Actions per 1,000 licensees
Ohio statewide rate
probation
Most common action type
56 cases
OMB 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 Ohio disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Huy Dang, MD - brand share 15.0%
Allergy & Immunology (Internal Medicine) Physician average
15% brand-name claims vs 82% generic, on 585 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.
585
Total Claims
$52K
Total Drug Cost
192
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 672
- Total Day Supply
- 16,353
- Brand vs Generic
- 15% brand / 82% generic
- Brand Drug Cost
- $46K
- Generic Drug Cost
- $5K
- Opioid Claims
- 24 (4.1% rate)
- Antibiotic Claims
- 61
Patient Demographics
- Average Patient Age
- 71.5 years
- Avg HCC Risk Score
- 2.75
- Gender Split
- 47% female / 53% male
- Age Distribution
- <65: 36, 65-74: 76, 75-84: 56, 85+: 24
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Huy Dang, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisone
Prednisone
38 claims
- Metoprolol Succinate
Metoprolol Succinate
32 claims
- Spironolactone
Spironolactone
32 claims
- Pantoprazole Sodium
Pantoprazole Sodium
27 claims
- Amlodipine Besylate
Amlodipine Besylate
25 claims
- Atorvastatin Calcium
Atorvastatin Calcium
24 claims
- Eliquis
Eliquis
23 claims
- Metoprolol Tartrate
Metoprolol Tartrate
18 claims
| Drug | Claims |
|---|---|
| Prednisone | 38 |
| Metoprolol Succinate | 32 |
| Spironolactone | 32 |
| Pantoprazole Sodium | 27 |
| Amlodipine Besylate | 25 |
| Atorvastatin Calcium | 24 |
| Eliquis Apixaban | 23 |
| Metoprolol Tartrate | 18 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 17 |
| Oxycodone Hcl | 17 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Allergy & Immunology (Internal Medicine) Physician in OH →
All providers in Ohio →
Compare specialties →
Allergy & Immunology (Internal Medicine) Physician Overview
How Huy Dang, MD fits within the Allergy & Immunology (Internal Medicine) Physician landscape nationally.
517
Allergy & Immunology (Internal Medicine) Physician Providers in US
47
States with Allergy & Immunology (Internal Medicine) Physician
798
Avg Claims per Provider
Huy Dang, MD's 585 claims are below the specialty average of 798.
Nationwide Allergy & Immunology (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Dang, both outside Ohio so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Allergy & Immunology (Internal Medicine) Physician Providers in Ohio
Other clinicians with the same primary specialty enrolled in Ohio, drawn from the same CMS NPPES roster as Dang.
One of 13 Allergy & Immunology (Internal Medicine) Physician providers enrolled in Ohio, 5 are shown here.
Frequently Asked Questions
What is Huy Dang, MD's specialty? ▼
Huy Dang, MD specializes in Allergy & Immunology (Internal Medicine) Physician and practices in Massillon, Ohio. Credentials: MD.
How much does Huy Dang, MD prescribe under Medicare Part D? ▼
In 2023, Huy Dang, MD wrote 585 Medicare Part D claims totaling $52K in drug costs for 192 beneficiaries.
Where is Huy Dang, MD located? ▼
Huy Dang, MD is located at 400 AUSTIN AVE NW, Massillon, OH, 44646. Phone: (330) 848-7943.
What is Huy Dang, MD's NPI number? ▼
Huy Dang, MD's National Provider Identifier (NPI) is 1689753105, issued on 11/03/2006.
Does Huy Dang, MD prescribe more brand-name or generic drugs? ▼
Huy Dang, MD's prescribing is 15% brand-name and 82% generic drugs by claim count, with $46K in brand drug costs.
Does Huy Dang, MD prescribe opioids? ▼
Yes, Huy Dang, MD had 24 opioid claims in 2023 with an opioid prescribing rate of 4.1%.
How many Allergy & Immunology (Internal Medicine) Physician providers are there in the US? ▼
There are 517 Allergy & Immunology (Internal Medicine) Physician providers across 47 states in the US. The average Allergy & Immunology (Internal Medicine) Physician provider writes 798 Medicare Part D claims per year.
What drugs does Huy Dang, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Huy Dang, MD's most frequently prescribed drugs include Prednisone, Metoprolol Succinate, Spironolactone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Huy Dang, MD accept Medicare? ▼
Huy Dang, MD appears in CMS Medicare data with 585 Part D claims and 192 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Huy Dang, MD's credentials? ▼
Huy Dang, MD's NPI is 1689753105 with credentials MD. 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
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.