NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1164664637 M.D.
Verify on CMS → Charles Arena, M.D.
Internal Medicine Physician in Salt Lake City, Utah.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,858 in 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
58
Medicare Part D claims · 14 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
78%
generic claims · 22% 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
Charles Arena, M.D. filed 58 Medicare Part D claims in 2023 as a Internal Medicine Physician in Salt Lake City, Utah, prescribing 78% generic.
- 58
- Part D claims, 2023
- 78%
- 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.
Charles Arena, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
58 0th percentile higher than 0% 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)
Charles Arena, M.D. 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 Charles Arena, M.D.?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
58 98% vs specialty avg
Specialty distribution in Utah
How Internal Medicine Physician compares to other specialties among Utah 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 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).
Charles Arena, M.D. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding M.D. credentials at 6065 FASHION BLVD, Salt Lake City, UT, 84107, with a listed phone of (801) 268-1610. NPI 1164664637 was issued on 03/30/2009.
Medicare Part D records for calendar year 2023 show 58 prescription claims written by this provider, covering 14 Medicare beneficiaries and totaling roughly $15K in drug spend, split 22% brand-name and 78% generic by claim count.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 enrolled providers across 56 states and an average of 2,716 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 | 1164664637 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 03/30/2009 |
Brand vs generic prescribing mix · Typical
Charles Arena, M.D. - brand share 22.0%
Internal Medicine Physician average
22% brand-name claims vs 78% generic, on 58 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.
58
Total Claims
$15K
Total Drug Cost
14
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 147
- Total Day Supply
- 4,330
- Brand vs Generic
- 22% brand / 78% generic
- Brand Drug Cost
- $14K
- Generic Drug Cost
- $1K
Patient Demographics
- Average Patient Age
- 73.2 years
- Avg HCC Risk Score
- 1.33
- Age Distribution
- <65: 0, 65-74: N/A, 75-84: N/A, 85+: 0
Internal Medicine Physician Overview
How Charles Arena, M.D. fits within the Internal Medicine Physician landscape nationally.
172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Charles Arena, M.D.'s 58 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Utah
Other clinicians with the same primary specialty enrolled in Utah, drawn from the same CMS NPPES roster as Arena.
Dr. Zameer Abedin
MD
Salt Lake City, UT
Dr. Scott Aberegg
MD
Murray, UT
Dr. Anu Abraham
MD
Salt Lake City, UT
Dr. Abdulelah Abu Qare
MD
Layton, UT
Dr. Conrad Addison
MD
Salt Lake City, UT
Compare 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 Utah medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby 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.
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Understanding Medicare Claims Data
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Frequently Asked Questions
What is Charles Arena, M.D.'s specialty? ▼
Charles Arena, M.D. specializes in Internal Medicine Physician and practices in Salt Lake City, Utah. Credentials: M.D..
How much does Charles Arena, M.D. prescribe under Medicare Part D? ▼
In 2023, Charles Arena, M.D. wrote 58 Medicare Part D claims totaling $15K in drug costs for 14 beneficiaries.
Where is Charles Arena, M.D. located? ▼
Charles Arena, M.D. is located at 6065 FASHION BLVD, Salt Lake City, UT, 84107. Phone: (801) 268-1610.
What is Charles Arena, M.D.'s NPI number? ▼
Charles Arena, M.D.'s National Provider Identifier (NPI) is 1164664637, issued on 03/30/2009.
Does Charles Arena, M.D. prescribe more brand-name or generic drugs? ▼
Charles Arena, M.D.'s prescribing is 22% brand-name and 78% generic drugs by claim count, with $14K in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,858 Internal Medicine Physician providers across 56 states in the US. The average Internal Medicine Physician provider writes 2,716 Medicare Part D claims per year.
Does Charles Arena, M.D. accept Medicare? ▼
Charles Arena, M.D. appears in CMS Medicare data with 58 Part D claims and 14 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Charles Arena, M.D.'s credentials? ▼
Charles Arena, M.D.'s NPI is 1164664637 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.