2026 NPPES data Adult Medicine Physician NPI 1649659178 M.D.
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CHARLES CLEMENTS, M.D.

Adult Medicine Physician in SAN ANTONIO, Texas. CMS National Plan and Provider Enumeration System profile including specialty classification, practice address, and Medicare prescribing data when reported.

Federal data — no proprietary rating. PlainDoctor publishes the actual CMS NPPES and Medicare records — NPI registration, specialty, practice location, and prescribing data — without a composite score or editorial opinion on top. Every field traces to a federal source.
Prescribing volume
1K
Medicare Part D claims · 77 beneficiaries · Adult Medicine Physician avg: 3K
Generic prescribing
85%
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)
What the federal data reveals: CHARLES CLEMENTS, M.D. is a Adult Medicine Physician ([object Object]) practicing in SAN ANTONIO, Texas with a Medicare Part D prescribing footprint of 1K claims across 77 beneficiaries — 15% brand-name prescribing . Industry payments of $59.8 across 3 transactions are disclosed under CMS Open Payments (Sunshine Act).

What stands out: CHARLES CLEMENTS, M.D. filed 1,179 Medicare Part D claims in 2023 across SAN ANTONIO, Texas. Every figure on this page comes straight from federal CMS records, with no proprietary rating applied.

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).

CHARLES CLEMENTS, M.D. at a glance

Quality data not reported

NPI registry status

Active

Issued 05/29/2015

NPI 1649659178

Primary specialty

Adult Medicine Physician

Niche

2,481 US NPIs in this specialty

Medicare Part D claims

1,179 58% vs specialty avg

2023 prescription claims

Specialty avg: 2,807

Specialty distribution in Texas

How Adult Medicine Physician compares to other specialties among Texas providers

Texas providers

Adult Medicine Physician share within Texas

1. Adult Medicine Physician42%2. Internal medicine21%3. Family medicine17%4. Surgical12%5. Pediatric8%
Adult Medicine Physician share within Texas

Specialty board-certification context

Estimated specialty board-certified rate — Adult Medicine Physician (ABMS / AOA reference)

Quality data not reported
Est. board-certified rate
78%
Adult Medicine Physician ABMS/AOA estimate

Est. board-certified rate (Adult Medicine Physician) — ABMS / AOA estimate

0%100%78%
Est. board-certified rate (Adult Medicine Physician) — ABMS / AOA estimate

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. is a Adult Medicine Physician provider practicing in SAN ANTONIO, Texas, according to the CMS National Plan and Provider Enumeration System (NPPES). Credentials: M.D.. NPI: 1649659178. This profile includes practice location, specialty classification, and organizational affiliations from the CMS provider registry. Provider information is self-reported to CMS and updated monthly.

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. Because NPPES data is self-reported by the provider and refreshed monthly, the address, phone, and specialty reflect what CLEMENTS most recently submitted to CMS rather than a vetted directory listing, which is why patients should always confirm the practice is still at this location before scheduling.

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 85% generic by claim count, with an opioid prescribing rate of 1.8%. These figures capture only Medicare Part D — commercial insurance, Medicaid, and cash-pay prescriptions are not included, and any drug-beneficiary cell under 11 is suppressed by CMS for patient privacy.

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

8203 FREDERICKSBURG RD
SAN ANTONIO, TX 78229

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%
Specialty average (est.)

15% brand-name claims vs 85% 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 / 85% 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.

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.

Compare Adult Medicine Physician nationally: see state-by-state distribution →

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 85% 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

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