NPI registry status
Active
2026 NPPES data Adult Medicine Physician NPI 1003960519 M.D.
Verify on CMS → Richard Chengson, M.D.
Adult Medicine Physician in Abilene, 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
944
Medicare Part D claims · 53 beneficiaries · Adult Medicine Physician avg: 3K
Generic prescribing
93%
generic claims · 4% brand-name · higher generic rates reduce patient out-of-pocket costs
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
Richard Chengson, M.D. filed 944 Medicare Part D claims in 2023 as a Adult Medicine Physician in Abilene, Texas, prescribing 93% generic.
- 944
- Part D claims, 2023
- 93%
- 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.
Richard Chengson, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
944 Top 25% higher than 75% 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)
Richard Chengson, 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 Richard Chengson, M.D.?
Quality data not reportedPrimary specialty
Adult Medicine Physician
Medicare Part D claims
944 66% 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).
Richard Chengson, M.D. appears in the CMS NPPES registry as a Adult Medicine Physician provider holding M.D. credentials at 2501 MAPLE ST, Abilene, TX, 79602, with a listed phone of (325) 795-3412. NPI 1003960519 was issued on 01/22/2007.
Medicare Part D records for calendar year 2023 show 944 prescription claims written by this provider, covering 53 Medicare beneficiaries and totaling roughly $83K in drug spend, split 4% brand-name and 93% generic by claim count.
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 | 1003960519 |
|---|---|
| Specialty | Adult Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 01/22/2007 |
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 Richard Chengson, M.D.. To verify Richard Chengson, 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 · Generic-heavy
Richard Chengson, M.D. - brand share 4.0%
Adult Medicine Physician average
4% brand-name claims vs 93% generic, on 944 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.
944
Total Claims
$83K
Total Drug Cost
53
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 976
- Total Day Supply
- 21,631
- Brand vs Generic
- 4% brand / 93% generic
- Brand Drug Cost
- $24K
- Generic Drug Cost
- $59K
Patient Demographics
- Average Patient Age
- 58.8 years
- Avg HCC Risk Score
- 2.11
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 32, 65-74: 17, 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 Richard Chengson, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Montelukast Sodium
Montelukast Sodium
80 claims
- Levetiracetam
Levetiracetam
76 claims
- Esomeprazole Magne…
Esomeprazole Magnesium
68 claims
- Levothyroxine Sodium
Levothyroxine Sodium
63 claims
- Clozapine 26
Clozapine
26 claims
- Metoprolol Tartrate 25
Metoprolol Tartrate
25 claims
- Phenobarbital 23
Phenobarbital
23 claims
- Zonisamide 22
Zonisamide
22 claims
| Drug | Claims |
|---|---|
| Montelukast Sodium | 80 |
| Levetiracetam | 76 |
| Esomeprazole Magnesium | 68 |
| Levothyroxine Sodium | 63 |
| Clozapine | 26 |
| Metoprolol Tartrate | 25 |
| Phenobarbital | 23 |
| Zonisamide | 22 |
| Lorazepam | 21 |
| Quetiapine Fumarate | 21 |
* 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 Richard Chengson, 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
Richard Chengson, M.D.'s 944 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 Chengson.
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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Frequently Asked Questions
What is Richard Chengson, M.D.'s specialty? ▼
Richard Chengson, M.D. specializes in Adult Medicine Physician and practices in Abilene, Texas. Credentials: M.D..
How much does Richard Chengson, M.D. prescribe under Medicare Part D? ▼
In 2023, Richard Chengson, M.D. wrote 944 Medicare Part D claims totaling $83K in drug costs for 53 beneficiaries.
Where is Richard Chengson, M.D. located? ▼
Richard Chengson, M.D. is located at 2501 MAPLE ST, Abilene, TX, 79602. Phone: (325) 795-3412.
What is Richard Chengson, M.D.'s NPI number? ▼
Richard Chengson, M.D.'s National Provider Identifier (NPI) is 1003960519, issued on 01/22/2007.
Does Richard Chengson, M.D. prescribe more brand-name or generic drugs? ▼
Richard Chengson, M.D.'s prescribing is 4% brand-name and 93% generic drugs by claim count, with $24K in brand drug costs.
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 Richard Chengson, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Richard Chengson, M.D.'s most frequently prescribed drugs include Montelukast Sodium, Levetiracetam, Esomeprazole Magnesium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Richard Chengson, M.D. accept Medicare? ▼
Richard Chengson, M.D. appears in CMS Medicare data with 944 Part D claims and 53 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Richard Chengson, M.D.'s credentials? ▼
Richard Chengson, M.D.'s NPI is 1003960519 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.