NPI registry status
Active
2026 NPPES data Otology & Neurotology Physician NPI 1508849845 MD
Verify on CMS → Hana Bui, MD
Otology & Neurotology Physician in Fullerton, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 334 in Otology & Neurotology 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
698
Medicare Part D claims · 219 beneficiaries · Otology & Neurotology Physician avg: 401
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Hana Bui, MD filed 698 Medicare Part D claims in 2023 as a Otology & Neurotology Physician in Fullerton, California.
- 698
- Part D claims, 2023
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.
Hana Bui, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
698 Top 31% higher than 69% 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
◑
Board-eligible specialty (heuristic, not verified)
Hana Bui, MD practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Hana Bui, MD?
Quality data not reportedPrimary specialty
Otology & Neurotology Physician
Medicare Part D claims
698 74% vs specialty avg
Specialty distribution in California
How Otology & Neurotology Physician compares to other specialties among California 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 Otology & Neurotology 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).
Hana Bui, MD appears in the CMS NPPES registry as an Otology & Neurotology Physician provider holding MD credentials at 1321 N HARBOR BLVD, Fullerton, CA, 92835, with a listed phone of (714) 870-4822. NPI 1508849845 was issued on 11/21/2005.
Medicare Part D records for calendar year 2023 show 698 prescription claims written by this provider, covering 219 Medicare beneficiaries and totaling roughly $22K in drug spend.
Otology & Neurotology Physician is a narrow specialty nationwide, with 334 enrolled providers across 46 states and an average of 401 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 | 1508849845 |
|---|---|
| Specialty | Otology & Neurotology Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 11/21/2005 |
License & disciplinary context - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Hana Bui, MD. To verify Hana Bui, MD's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
698
Total Claims
$22K
Total Drug Cost
219
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,468
- Total Day Supply
- 41,866
- Generic Drug Cost
- $19K
- Antibiotic Claims
- 61
Patient Demographics
- Average Patient Age
- 77.5 years
- Avg HCC Risk Score
- 1.51
- Gender Split
- 65% female / 35% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Hana Bui, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Montelukast Sodium
Montelukast Sodium
205 claims
- Fluticasone Propio…
Fluticasone Propionate
108 claims
- Ipratropium Bromide 57
Ipratropium Bromide
57 claims
- Azelastine Hcl 49
Azelastine Hcl
49 claims
- Mometasone Furoate 33
Mometasone Furoate
33 claims
- Amoxicillin-Clavul… 32
Amoxicillin-Clavulanate Potass
32 claims
- Omeprazole 31
Omeprazole
31 claims
- Fluocinolone Aceto… 25
Fluocinolone Acetonide Oil
25 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 205 |
| Fluticasone Propionate | 108 |
| Ipratropium Bromide | 57 |
| Azelastine Hcl | 49 |
| Mometasone Furoate | 33 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 32 |
| Omeprazole | 31 |
| Fluocinolone Acetonide Oil | 25 |
| Triamterene-Hydrochlorothiazid Triamterene/Hydrochlorothiazid | 25 |
| Meclizine Hcl | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Otology & Neurotology Physician Overview
How Hana Bui, MD fits within the Otology & Neurotology Physician landscape nationally.
334
Otology & Neurotology Physician Providers in US
46
States with Otology & Neurotology Physician
401
Avg Claims per Provider
Hana Bui, MD's 698 claims are above the specialty average of 401.
Nearby Otology & Neurotology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Bui.
Dr. Sumit Agrawal
M.D.
Stanford, CA
Dr. Sameer Ahmed
M.D.
Downey, CA
Dr. Juan Andrade
MD
Huntington Park, CA
Dr. James Andrews
M.D.
Northridge, CA
Dr. Ashley Balaker
M.D.
Laguna Hills, CA
Compare Otology & Neurotology 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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Otology & Neurotology 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore California
Frequently Asked Questions
What is Hana Bui, MD's specialty? ▼
Hana Bui, MD specializes in Otology & Neurotology Physician and practices in Fullerton, California. Credentials: MD.
How much does Hana Bui, MD prescribe under Medicare Part D? ▼
In 2023, Hana Bui, MD wrote 698 Medicare Part D claims totaling $22K in drug costs for 219 beneficiaries.
Where is Hana Bui, MD located? ▼
Hana Bui, MD is located at 1321 N HARBOR BLVD, Fullerton, CA, 92835. Phone: (714) 870-4822.
What is Hana Bui, MD's NPI number? ▼
Hana Bui, MD's National Provider Identifier (NPI) is 1508849845, issued on 11/21/2005.
How many Otology & Neurotology Physician providers are there in the US? ▼
There are 334 Otology & Neurotology Physician providers across 46 states in the US. The average Otology & Neurotology Physician provider writes 401 Medicare Part D claims per year.
What drugs does Hana Bui, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Hana Bui, MD's most frequently prescribed drugs include Montelukast Sodium, Fluticasone Propionate, Ipratropium Bromide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Hana Bui, MD accept Medicare? ▼
Hana Bui, MD appears in CMS Medicare data with 698 Part D claims and 219 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Hana Bui, MD's credentials? ▼
Hana Bui, MD's NPI is 1508849845 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
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.