NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1487752911 M.D.
Verify on CMS → Charles Mardis, M.D.
Internal Medicine Physician in Atlanta, Georgia.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 172,737 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
2K
Medicare Part D claims · 182 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
60%
generic claims · 39% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Charles Mardis, M.D. filed 1,617 Medicare Part D claims in 2023 as an Internal Medicine Physician in Atlanta, Georgia, prescribing 60% generic.
- 2K
- Part D claims, 2023
- 60%
- 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 Mardis, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,617 Top 18% higher than 82% 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 Mardis, 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 Mardis, M.D.?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
1,617 40% vs specialty avg
Specialty distribution in Georgia
How Internal Medicine Physician compares to other specialties among Georgia 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 Mardis, M.D. appears in the CMS NPPES registry as an Internal Medicine Physician provider holding M.D. credentials at 1438 W PEACHTREE ST NW, Atlanta, GA, 30309, with a listed phone of (470) 283-7349. NPI 1487752911 was issued on 09/20/2006.
Medicare Part D records for calendar year 2023 show 1,617 prescription claims written by this provider, covering 182 Medicare beneficiaries and totaling roughly $1.7 million in drug spend, split 39% brand-name and 60% generic by claim count.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 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 | 1487752911 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 09/20/2006 |
Brand vs generic prescribing mix · Above average
Charles Mardis, M.D. - brand share 39.0%
Internal Medicine Physician average
39% brand-name claims vs 60% generic, on 1,617 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.
1,617
Total Claims
$1.7M
Total Drug Cost
182
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,943
- Total Day Supply
- 56,775
- Brand vs Generic
- 39% brand / 60% generic
- Brand Drug Cost
- $1.7M
- Generic Drug Cost
- $33K
- Antibiotic Claims
- 11
Patient Demographics
- Average Patient Age
- 59.7 years
- Avg HCC Risk Score
- 1.59
- Gender Split
- 30% female / 70% male
- Age Distribution
- <65: 111, 65-74: 62, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Charles Mardis, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
93 claims
- Biktarvy
Biktarvy
82 claims
- Tivicay
Tivicay
73 claims
- Amlodipine Besylate
Amlodipine Besylate
64 claims
- Descovy
Descovy
53 claims
- Odefsey
Odefsey
43 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
43 claims
- Symtuza
Symtuza
43 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 93 |
| Biktarvy Bictegrav/Emtricit/Tenofov Ala | 82 |
| Tivicay Dolutegravir Sodium | 73 |
| Amlodipine Besylate | 64 |
| Descovy Emtricitabine/Tenofov Alafenam | 53 |
| Odefsey Emtricitab/Rilpiviri/Tenof Ala | 43 |
| Rosuvastatin Calcium | 43 |
| Symtuza Darunavir/Cob/Emtri/Tenof Alaf | 43 |
| Dovato Dolutegravir Sodium/Lamivudine | 37 |
| Lisinopril | 37 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Internal Medicine Physician Overview
How Charles Mardis, M.D. fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Charles Mardis, M.D.'s 1,617 claims are below the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Georgia
Other clinicians with the same primary specialty enrolled in Georgia, drawn from the same CMS NPPES roster as Mardis.
Dr. Ugochi Abazie
M.D
Riverdale, GA
Dr. Muhammad Abbasi
M.D.
Covington, GA
Rahat Abbasi
Augusta, GA
Dr. Diane Abby Burr
D.O.
Carrollton, GA
Dr. Bsmah Abdalslam
M.D
Austell, GA
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 Georgia 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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Frequently Asked Questions
What is Charles Mardis, M.D.'s specialty? ▼
Charles Mardis, M.D. specializes in Internal Medicine Physician and practices in Atlanta, Georgia. Credentials: M.D..
How much does Charles Mardis, M.D. prescribe under Medicare Part D? ▼
In 2023, Charles Mardis, M.D. wrote 1,617 Medicare Part D claims totaling $1.7M in drug costs for 182 beneficiaries.
Where is Charles Mardis, M.D. located? ▼
Charles Mardis, M.D. is located at 1438 W PEACHTREE ST NW, Atlanta, GA, 30309. Phone: (470) 283-7349.
What is Charles Mardis, M.D.'s NPI number? ▼
Charles Mardis, M.D.'s National Provider Identifier (NPI) is 1487752911, issued on 09/20/2006.
Does Charles Mardis, M.D. prescribe more brand-name or generic drugs? ▼
Charles Mardis, M.D.'s prescribing is 39% brand-name and 60% generic drugs by claim count, with $1.7M in brand drug costs.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,737 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.
What drugs does Charles Mardis, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Charles Mardis, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Biktarvy, Tivicay. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Charles Mardis, M.D. accept Medicare? ▼
Charles Mardis, M.D. appears in CMS Medicare data with 1,617 Part D claims and 182 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Charles Mardis, M.D.'s credentials? ▼
Charles Mardis, M.D.'s NPI is 1487752911 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
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.