NPI registry status
Active
2026 NPPES data Gastroenterology Physician NPI 1518997477 M.D.
Verify on CMS → John Clemmons, M.D.
Gastroenterology Physician in Houston, 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 16,567 in Gastroenterology 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
5K
Medicare Part D claims · 738 beneficiaries · Gastroenterology Physician avg: 833
Generic prescribing
86%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
78.5/100
▼ 5 pts below national avg 83.1 · Above neutral
Industry payments
$1.2K
72 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
John Clemmons, M.D. reported a CMS MIPS final score of 78.5/100 - below the 83.1 national average - and filed 4,892 Medicare Part D claims in 2023.
- 78.5/100
- MIPS score · -5 vs avg
- 5K
- Part D claims, 2023
- 86%
- generic prescribing
- 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.
John Clemmons, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
79 27th percentile higher than 27% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. 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 Merit-based Incentive Payment System (MIPS) · 2023
Where John Clemmons, M.D. sits
This provider among gastroenterology physician peers
Across the 5,957 gastroenterology physician providers who report both Medicare Part D prescribing and a MIPS quality score, John Clemmons, M.D. writes more Part D claims than 99% of them and scores higher on MIPS quality than 27% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one gastroenterology physician peer from a representative sample of 60; the gold marker is John Clemmons, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
John Clemmons, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - 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 John Clemmons, M.D.?
Near national averagePrimary specialty
Gastroenterology Physician
Medicare Part D claims
4,892 6× vs specialty avg
MIPS final score
78.5/100 4.6 pts vs avg
Specialty distribution in Texas
How Gastroenterology Physician compares to other specialties among Texas providers
Medicare quality performance, MIPS
John Clemmons, M.D.'s 2023 MIPS final score plotted against the Gastroenterology Physician national average
- MIPS Final Score
- 78.5/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Gastroenterology Physician) - 78.5/100 vs national avg 83.1
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).
John Clemmons, M.D. appears in the CMS NPPES registry as a Gastroenterology Physician provider holding M.D. credentials at 1213 HERMANN DR STE 220, Houston, TX, 77004, with a listed phone of (713) 528-6562. NPI 1518997477 was issued on 07/04/2006.
Medicare Part D records for calendar year 2023 show 4,892 prescription claims written by this provider, covering 738 Medicare beneficiaries and totaling roughly $642K in drug spend, split 14% brand-name and 86% generic by claim count, with an opioid prescribing rate of 0.7%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 78.5/100 for the 2023 performance year (Quality 49.1, Cost 80.1), compared with the national average of 83.1.
Gastroenterology Physician is a mid-sized specialty nationwide, with 16,567 enrolled providers across 54 states and an average of 833 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 | 1518997477 |
|---|---|
| Specialty | Gastroenterology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/04/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
78.5188
Final Score
Avg: 83.1
49.1015
Quality
80.058
Cost
Reporting: Individual
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 John Clemmons, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$1.2K
Largest payer
Salix Pharmaceuticals, a division of Bausch Health US, LLC
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 John Clemmons, M.D.. To verify John Clemmons, 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
John Clemmons, M.D. - brand share 14.0%
Gastroenterology Physician average
14% brand-name claims vs 86% generic, on 4,892 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.
4,892
Total Claims
$642K
Total Drug Cost
738
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,843
- Total Day Supply
- 250,231
- Brand vs Generic
- 14% brand / 86% generic
- Brand Drug Cost
- $483K
- Generic Drug Cost
- $157K
- Opioid Claims
- 36 (0.7% rate)
- Antibiotic Claims
- 130
Patient Demographics
- Average Patient Age
- 72.8 years
- Avg HCC Risk Score
- 1.52
- Gender Split
- 56% female / 44% male
- Age Distribution
- <65: 74, 65-74: 379, 75-84: 214, 85+: 71
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Clemmons, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Pantoprazole Sodium
Pantoprazole Sodium
536 claims
- Atorvastatin Calcium
Atorvastatin Calcium
243 claims
- Amlodipine Besylate
Amlodipine Besylate
233 claims
- Dicyclomine Hcl 142
Dicyclomine Hcl
142 claims
- Omeprazole 128
Omeprazole
128 claims
- Levothyroxine Sodium 89
Levothyroxine Sodium
89 claims
- Losartan-Hydrochlo… 86
Losartan-Hydrochlorothiazide
86 claims
- Potassium Chloride 78
Potassium Chloride
78 claims
| Drug | Claims |
|---|---|
| Pantoprazole Sodium | 536 |
| Atorvastatin Calcium | 243 |
| Amlodipine Besylate | 233 |
| Dicyclomine Hcl | 142 |
| Omeprazole | 128 |
| Levothyroxine Sodium | 89 |
| Losartan-Hydrochlorothiazide Losartan/Hydrochlorothiazide | 86 |
| Potassium Chloride | 78 |
| Sucralfate | 71 |
| Gabapentin | 67 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Gastroenterology Physician Overview
How John Clemmons, M.D. fits within the Gastroenterology Physician landscape nationally.
16,567
Gastroenterology Physician Providers in US
54
States with Gastroenterology Physician
833
Avg Claims per Provider
John Clemmons, M.D.'s 4,892 claims are above the specialty average of 833.
Nearby Gastroenterology Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Clemmons.
Ali Aamar
Houston, TX
Abdullah Abdussalam
Mansfield, TX
Dr. Olufemi Abiodun
MD
Arlington, TX
Dr. Bincy Abraham
MD
Houston, TX
Dr. Cherian Abraham
M.D.
North Richland Hills, TX
Compare Gastroenterology 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 Gastroenterology 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 John Clemmons, M.D.'s specialty? ▼
John Clemmons, M.D. specializes in Gastroenterology Physician and practices in Houston, Texas. Credentials: M.D..
How much does John Clemmons, M.D. prescribe under Medicare Part D? ▼
In 2023, John Clemmons, M.D. wrote 4,892 Medicare Part D claims totaling $642K in drug costs for 738 beneficiaries.
What is John Clemmons, M.D.'s Medicare quality score? ▼
John Clemmons, M.D. has a CMS MIPS Final Score of 78.5/100 (Quality: 49.1, Cost: 80.1). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is John Clemmons, M.D. located? ▼
John Clemmons, M.D. is located at 1213 HERMANN DR STE 220, Houston, TX, 77004. Phone: (713) 528-6562.
What is John Clemmons, M.D.'s NPI number? ▼
John Clemmons, M.D.'s National Provider Identifier (NPI) is 1518997477, issued on 07/04/2006.
Does John Clemmons, M.D. prescribe more brand-name or generic drugs? ▼
John Clemmons, M.D.'s prescribing is 14% brand-name and 86% generic drugs by claim count, with $483K in brand drug costs.
Does John Clemmons, M.D. prescribe opioids? ▼
Yes, John Clemmons, M.D. had 36 opioid claims in 2023 with an opioid prescribing rate of 0.7%.
How many Gastroenterology Physician providers are there in the US? ▼
There are 16,567 Gastroenterology Physician providers across 54 states in the US. The average Gastroenterology Physician provider writes 833 Medicare Part D claims per year.
What drugs does John Clemmons, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, John Clemmons, M.D.'s most frequently prescribed drugs include Pantoprazole Sodium, Atorvastatin Calcium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Clemmons, M.D. accept Medicare? ▼
John Clemmons, M.D. appears in CMS Medicare data with 4,892 Part D claims and 738 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Clemmons, M.D.'s credentials? ▼
John Clemmons, M.D.'s NPI is 1518997477 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.