NPI registry status
Active
2026 NPPES data Specialist NPI 1023016383 M.D.
Verify on CMS → Denny Bales, M.D.
Specialist in Honolulu, Hawaii.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 69,608 in Specialist, 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
789
Medicare Part D claims · 87 beneficiaries · Specialist avg: 1K
Generic prescribing
87%
generic claims · 13% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Denny Bales, M.D. filed 789 Medicare Part D claims in 2023 as a Specialist in Honolulu, Hawaii, prescribing 87% generic.
- 789
- Part D claims, 2023
- 87%
- generic prescribing
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.
Denny Bales, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
789 Top 29% higher than 71% 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
What does the federal data show about Denny Bales, M.D.?
Quality data not reportedPrimary specialty
Specialist
Medicare Part D claims
789 46% vs specialty avg
Specialty distribution in Hawaii
How Specialist compares to other specialties among Hawaii 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 Specialist. 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).
Denny Bales, M.D. appears in the CMS NPPES registry as a Specialist provider holding M.D. credentials at 1380 LUSITANA ST, Honolulu, HI, 96813, with a listed phone of (808) 521-7402. NPI 1023016383 was issued on 07/11/2005.
Medicare Part D records for calendar year 2023 show 789 prescription claims written by this provider, covering 87 Medicare beneficiaries and totaling roughly $162K in drug spend, split 13% brand-name and 87% generic by claim count.
Specialist is a high-volume specialty nationwide, with 69,608 enrolled providers across 55 states and an average of 1,474 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 | 1023016383 |
|---|---|
| Specialty | Specialist |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/11/2005 |
Brand vs generic prescribing mix · Typical
Denny Bales, M.D. - brand share 13.0%
Specialist average
13% brand-name claims vs 87% generic, on 789 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.
789
Total Claims
$162K
Total Drug Cost
87
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,291
- Total Day Supply
- 68,505
- Brand vs Generic
- 13% brand / 87% generic
- Brand Drug Cost
- $132K
- Generic Drug Cost
- $30K
Patient Demographics
- Average Patient Age
- 78.3 years
- Avg HCC Risk Score
- 1.35
- Gender Split
- 36% female / 64% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Denny Bales, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
136 claims
- Amlodipine Besylate
Amlodipine Besylate
115 claims
- Losartan Potassium
Losartan Potassium
87 claims
- Eliquis
Eliquis
57 claims
- Metoprolol Succinate 48
Metoprolol Succinate
48 claims
- Metoprolol Tartrate 40
Metoprolol Tartrate
40 claims
- Ezetimibe 39
Ezetimibe
39 claims
- Rosuvastatin Calcium 21
Rosuvastatin Calcium
21 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 136 |
| Amlodipine Besylate | 115 |
| Losartan Potassium | 87 |
| Eliquis Apixaban | 57 |
| Metoprolol Succinate | 48 |
| Metoprolol Tartrate | 40 |
| Ezetimibe | 39 |
| Rosuvastatin Calcium | 21 |
| Spironolactone | 20 |
| Lisinopril | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Specialist Overview
How Denny Bales, M.D. fits within the Specialist landscape nationally.
69,608
Specialist Providers in US
55
States with Specialist
1,474
Avg Claims per Provider
Denny Bales, M.D.'s 789 claims are below the specialty average of 1,474.
Nearby Specialist Providers in Hawaii
Other clinicians with the same primary specialty enrolled in Hawaii, drawn from the same CMS NPPES roster as Bales.
Dr. Jennifer Aberhart
BSC PT
Kihei, HI
Dr. Bettina Ackermann
MD
Wailuku, HI
Dr. Jhoan Acosta
CNA
Honolulu, HI
Vida Adams
Ewa Beach, HI
Dr. Matthew Adaniya
M.D.
Honolulu, HI
Compare Specialist 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 Hawaii medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Specialist 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
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
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Frequently Asked Questions
What is Denny Bales, M.D.'s specialty? ▼
Denny Bales, M.D. specializes in Specialist and practices in Honolulu, Hawaii. Credentials: M.D..
How much does Denny Bales, M.D. prescribe under Medicare Part D? ▼
In 2023, Denny Bales, M.D. wrote 789 Medicare Part D claims totaling $162K in drug costs for 87 beneficiaries.
Where is Denny Bales, M.D. located? ▼
Denny Bales, M.D. is located at 1380 LUSITANA ST, Honolulu, HI, 96813. Phone: (808) 521-7402.
What is Denny Bales, M.D.'s NPI number? ▼
Denny Bales, M.D.'s National Provider Identifier (NPI) is 1023016383, issued on 07/11/2005.
Does Denny Bales, M.D. prescribe more brand-name or generic drugs? ▼
Denny Bales, M.D.'s prescribing is 13% brand-name and 87% generic drugs by claim count, with $132K in brand drug costs.
How many Specialist providers are there in the US? ▼
There are 69,608 Specialist providers across 55 states in the US. The average Specialist provider writes 1,474 Medicare Part D claims per year.
What drugs does Denny Bales, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Denny Bales, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Losartan Potassium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Denny Bales, M.D. accept Medicare? ▼
Denny Bales, M.D. appears in CMS Medicare data with 789 Part D claims and 87 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Denny Bales, M.D.'s credentials? ▼
Denny Bales, M.D.'s NPI is 1023016383 with credentials M.D.. 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.