2026 NPPES data Allergy & Immunology (Internal Medicine) Physician NPI 1689753105 MD
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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 520 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)
Compiled from official public sources by the PlainDoctor editorial team.

What the federal data shows

Huy Dang, MD filed 585 Medicare Part D claims in 2023 as a Allergy & Immunology (Internal Medicine) Physician in Massillon, Ohio, prescribing 82% generic.

585
Part D claims, 2023
82%
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.

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 Top 34% higher than 66% 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%). This entry sits in this band. 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 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 reported

NPI registry status

Active

Issued 11/03/2006

NPI 1689753105

Primary specialty

Allergy & Immunology (Internal Medicine) Physician

Niche

520 US NPIs in this specialty

Medicare Part D claims

585 27% vs specialty avg

2023 prescription claims

Specialty avg: 798

Specialty distribution in Ohio

How Allergy & Immunology (Internal Medicine) Physician compares to other specialties among Ohio providers

Ohio providers

Largest specialties in Ohio (% of in-state providers)

Case Manager/Care Coordinator - 10.9%Case Manager/Care Coordinator10.9%Student in an Organized Health Care Education/Training Program - 4.7%Student in an Organized Health Care Education/Training Program4.7%Licensed Practical Nurse - 4%Licensed Practical Nurse4%Addiction (Substance Use Disorder) Counselor - 3.5%Addiction (Substance Use Disorder) Counselor3.5%Registered Nurse - 3.4%Registered Nurse3.4%Pharmacist - 3.4%Pharmacist3.4%Allergy & Immunology (Internal Medicine) Physician - 0%Allergy & Immunology (Internal Medicine) Physician0%
Largest specialties in Ohio (% of in-state providers)

Specialty board-certification context

Estimated specialty board-certified rate - Allergy & Immunology (Internal Medicine) Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Allergy & Immunology (Internal Medicine) Physician ABMS/AOA estimate

Est. board-certified rate (Allergy & Immunology (Internal Medicine) Physician) - ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Allergy & Immunology (Internal Medicine) 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).

Huy Dang, MD appears in the CMS NPPES registry as a Allergy & Immunology (Internal Medicine) Physician provider holding MD credentials at 400 AUSTIN AVE NW, Massillon, OH, 44646, with a listed phone of (330) 848-7943. NPI 1689753105 was issued on 11/03/2006. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what Dang 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 585 prescription claims written by this provider, covering 192 Medicare beneficiaries and totaling roughly $52K in drug spend, split 15% brand-name and 82% generic by claim count, with an opioid prescribing rate of 4.1%. 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.

Allergy & Immunology (Internal Medicine) Physician is a narrow specialty nationwide, with 520 enrolled providers across 48 states and an average of 798 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

400 AUSTIN AVE NW
Massillon, OH 44646

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

claims
Source CMS Medicare Part D Prescriber Public Use File As of 2023
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.

Allergy & Immunology (Internal Medicine) Physician Overview

How Huy Dang, MD fits within the Allergy & Immunology (Internal Medicine) Physician landscape nationally.

520
Allergy & Immunology (Internal Medicine) Physician Providers in US
48
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.

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.

Compare Allergy & Immunology (Internal Medicine) Physician 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 Ohio medical board, federal registration is not a license check. Credential verification guide
  • Weigh a second option: compare this provider with a nearby Allergy & Immunology (Internal Medicine) Physician 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.

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 520 Allergy & Immunology (Internal Medicine) Physician providers across 48 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

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.