NPI registry status
Active
2026 NPPES data Adult Medicine Physician NPI 1649659178 M.D.
Verify on CMS → Charles Clements, M.D.
Adult Medicine Physician in San Antonio, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 2,481 in Adult 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
1K
Medicare Part D claims · 77 beneficiaries · Adult Medicine Physician avg: 3K
Generic prescribing
84%
generic claims · 15% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$59.8
3 payments · CMS Open Payments (Sunshine Act)
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 Clements, M.D. filed 1,179 Medicare Part D claims in 2023 as a Adult Medicine Physician in San Antonio, Texas, prescribing 84% generic.
- 1K
- Part D claims, 2023
- 84%
- generic prescribing
- $59.8
- industry payments (Sunshine Act)
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 Clements, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,179 Top 23% higher than 77% 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 Clements, 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 Clements, M.D.?
Quality data not reportedPrimary specialty
Adult Medicine Physician
Medicare Part D claims
1,179 58% vs specialty avg
Specialty distribution in Texas
How Adult Medicine Physician compares to other specialties among Texas 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 Adult 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 Clements, M.D. appears in the CMS NPPES registry as a Adult Medicine Physician provider holding M.D. credentials at 8203 FREDERICKSBURG RD, San Antonio, TX, 78229, with a listed phone of (210) 592-4144. NPI 1649659178 was issued on 05/29/2015.
Medicare Part D records for calendar year 2023 show 1,179 prescription claims written by this provider, covering 77 Medicare beneficiaries and totaling roughly $223K in drug spend, split 15% brand-name and 84% generic by claim count, with an opioid prescribing rate of 1.8%.
Adult Medicine Physician is a narrow specialty nationwide, with 2,481 enrolled providers across 52 states and an average of 2,807 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 | 1649659178 |
|---|---|
| Specialty | Adult Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 05/29/2015 |
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Charles Clements, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$60
Largest payer
ABBVIE INC.
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - Texas TMB 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 ~77K Texas medical licensees in 2023 - they are NOT specific to Charles Clements, M.D.. To verify Charles Clements, M.D.'s current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB 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 Texas disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Charles Clements, M.D. - brand share 15.0%
Adult Medicine Physician average
15% brand-name claims vs 84% generic, on 1,179 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.
1,179
Total Claims
$223K
Total Drug Cost
77
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,446
- Total Day Supply
- 68,606
- Brand vs Generic
- 15% brand / 84% generic
- Brand Drug Cost
- $201K
- Generic Drug Cost
- $21K
- Opioid Claims
- 21 (1.8% rate)
- Antibiotic Claims
- 73
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 0.99
- Gender Split
- 53% female / 47% 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 Clements, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
48 claims
- Alprazolam
Alprazolam
37 claims
- Omeprazole
Omeprazole
36 claims
- Hydrochlorothiazide
Hydrochlorothiazide
29 claims
- Levothyroxine Sodium
Levothyroxine Sodium
29 claims
- Rosuvastatin Calcium
Rosuvastatin Calcium
27 claims
- Clonazepam
Clonazepam
24 claims
- Escitalopram Oxalate
Escitalopram Oxalate
24 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 48 |
| Alprazolam | 37 |
| Omeprazole | 36 |
| Hydrochlorothiazide | 29 |
| Levothyroxine Sodium | 29 |
| Rosuvastatin Calcium | 27 |
| Clonazepam | 24 |
| Escitalopram Oxalate | 24 |
| Ondansetron Odt Ondansetron | 22 |
| Trulicity Dulaglutide | 22 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Adult Medicine Physician Overview
How Charles Clements, M.D. fits within the Adult Medicine Physician landscape nationally.
2,481
Adult Medicine Physician Providers in US
52
States with Adult Medicine Physician
2,807
Avg Claims per Provider
Charles Clements, M.D.'s 1,179 claims are below the specialty average of 2,807.
Nearby Adult Medicine Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Clements.
Dr. Francisco Acebo
M.D.
Corpus Christi, TX
Dr. Vasantha Agusala
M.D
Odessa, TX
Dr. Michael Ainsworth
MD
Galveston, TX
Dr. Shannon Allmann-Benoit
APRN-C
Beaumont, TX
Dr. Jesus Alonzo
MD
El Paso, TX
Compare Adult 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 Texas medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Adult 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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How insurance networks affect your costs
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Frequently Asked Questions
What is Charles Clements, M.D.'s specialty? ▼
Charles Clements, M.D. specializes in Adult Medicine Physician and practices in San Antonio, Texas. Credentials: M.D..
How much does Charles Clements, M.D. prescribe under Medicare Part D? ▼
In 2023, Charles Clements, M.D. wrote 1,179 Medicare Part D claims totaling $223K in drug costs for 77 beneficiaries.
Where is Charles Clements, M.D. located? ▼
Charles Clements, M.D. is located at 8203 FREDERICKSBURG RD, San Antonio, TX, 78229. Phone: (210) 592-4144.
What is Charles Clements, M.D.'s NPI number? ▼
Charles Clements, M.D.'s National Provider Identifier (NPI) is 1649659178, issued on 05/29/2015.
Does Charles Clements, M.D. prescribe more brand-name or generic drugs? ▼
Charles Clements, M.D.'s prescribing is 15% brand-name and 84% generic drugs by claim count, with $201K in brand drug costs.
Does Charles Clements, M.D. prescribe opioids? ▼
Yes, Charles Clements, M.D. had 21 opioid claims in 2023 with an opioid prescribing rate of 1.8%.
How many Adult Medicine Physician providers are there in the US? ▼
There are 2,481 Adult Medicine Physician providers across 52 states in the US. The average Adult Medicine Physician provider writes 2,807 Medicare Part D claims per year.
What drugs does Charles Clements, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Charles Clements, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Alprazolam, Omeprazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Charles Clements, M.D. accept Medicare? ▼
Charles Clements, M.D. appears in CMS Medicare data with 1,179 Part D claims and 77 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Charles Clements, M.D.'s credentials? ▼
Charles Clements, M.D.'s NPI is 1649659178 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.