NPI registry status
Active
2026 NPPES data Nephrology Physician NPI 1235136565 M.D.
Verify on CMS → Charles Carter, M.D.
Nephrology Physician in Tucson, Arizona.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 10,569 in Nephrology 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
561
Medicare Part D claims · 133 beneficiaries · Nephrology Physician avg: 1K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Charles Carter, M.D. filed 561 Medicare Part D claims in 2023 as a Nephrology Physician in Tucson, Arizona.
- 561
- Part D claims, 2023
- 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.
Charles Carter, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
561 Top 34% higher than 66% 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 certification likely (heuristic, not verified)
Charles Carter, M.D. 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 Charles Carter, M.D.?
Quality data not reportedPrimary specialty
Nephrology Physician
Medicare Part D claims
561 61% vs specialty avg
Specialty distribution in Arizona
How Nephrology Physician compares to other specialties among Arizona 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 Nephrology 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 Carter, M.D. appears in the CMS NPPES registry as a Nephrology Physician provider holding M.D. credentials at 4511 N CAMPBELL AVE STE 100, Tucson, AZ, 85718, with a listed phone of (520) 529-6500. NPI 1235136565 was issued on 07/01/2005.
Medicare Part D records for calendar year 2023 show 561 prescription claims written by this provider, covering 133 Medicare beneficiaries and totaling roughly $43K in drug spend.
Nephrology Physician is a mid-sized specialty nationwide, with 10,569 enrolled providers across 55 states and an average of 1,454 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 | 1235136565 |
|---|---|
| Specialty | Nephrology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/01/2005 |
Hospital and facility affiliations
Facilities where Charles Carter, M.D. 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.
Akdhc LLC
Tucson, AZ
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
561
Total Claims
$43K
Total Drug Cost
133
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,249
- Total Day Supply
- 36,589
- Generic Drug Cost
- $12K
- Antibiotic Claims
- 31
Patient Demographics
- Average Patient Age
- 71.3 years
- Avg HCC Risk Score
- 2.15
- Gender Split
- 56% female / 44% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Charles Carter, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Lisinopril
Lisinopril
61 claims
- Losartan Potassium
Losartan Potassium
45 claims
- Amlodipine Besylate
Amlodipine Besylate
38 claims
- Metoprolol Succinate
Metoprolol Succinate
32 claims
- Calcitriol
Calcitriol
26 claims
- Furosemide
Furosemide
26 claims
- Hydralazine Hcl
Hydralazine Hcl
26 claims
- Prednisone
Prednisone
26 claims
| Drug | Claims |
|---|---|
| Lisinopril | 61 |
| Losartan Potassium | 45 |
| Amlodipine Besylate | 38 |
| Metoprolol Succinate | 32 |
| Calcitriol | 26 |
| Furosemide | 26 |
| Hydralazine Hcl | 26 |
| Prednisone | 26 |
| Tamsulosin Hcl | 24 |
| Potassium Chloride | 19 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Nephrology Physician Overview
How Charles Carter, M.D. fits within the Nephrology Physician landscape nationally.
10,569
Nephrology Physician Providers in US
55
States with Nephrology Physician
1,454
Avg Claims per Provider
Charles Carter, M.D.'s 561 claims are below the specialty average of 1,454.
Nearby Nephrology Physician Providers in Arizona
Other clinicians with the same primary specialty enrolled in Arizona, drawn from the same CMS NPPES roster as Carter.
Dr. Abubakr Abdelaziz
M.D
Kingman, AZ
Dr. Sohail Abdul Salim
MD
Phoenix, AZ
Mhd Majed Abdul Wahab
Peoria, AZ
Dr. Manuel Abrante
M.D.
Mesa, AZ
Dr. Chirag Acharya
MD
Sun City, AZ
Compare Nephrology 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 Arizona medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Nephrology 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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Frequently Asked Questions
What is Charles Carter, M.D.'s specialty? ▼
Charles Carter, M.D. specializes in Nephrology Physician and practices in Tucson, Arizona. Credentials: M.D..
How much does Charles Carter, M.D. prescribe under Medicare Part D? ▼
In 2023, Charles Carter, M.D. wrote 561 Medicare Part D claims totaling $43K in drug costs for 133 beneficiaries.
Where is Charles Carter, M.D. located? ▼
Charles Carter, M.D. is located at 4511 N CAMPBELL AVE STE 100, Tucson, AZ, 85718. Phone: (520) 529-6500.
What is Charles Carter, M.D.'s NPI number? ▼
Charles Carter, M.D.'s National Provider Identifier (NPI) is 1235136565, issued on 07/01/2005.
How many Nephrology Physician providers are there in the US? ▼
There are 10,569 Nephrology Physician providers across 55 states in the US. The average Nephrology Physician provider writes 1,454 Medicare Part D claims per year.
What drugs does Charles Carter, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Charles Carter, M.D.'s most frequently prescribed drugs include Lisinopril, Losartan Potassium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Charles Carter, M.D. accept Medicare? ▼
Charles Carter, M.D. appears in CMS Medicare data with 561 Part D claims and 133 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Charles Carter, M.D.'s credentials? ▼
Charles Carter, M.D.'s NPI is 1235136565 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.