NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1851307102 MD
Verify on CMS → Kian Leong, MD
Internal Medicine Physician in Austin, 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 172,858 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
7K
Medicare Part D claims · 558 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
91%
generic claims · 9% 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
Kian Leong, MD filed 6,673 Medicare Part D claims in 2023 as a Internal Medicine Physician in Austin, Texas, prescribing 91% generic.
- 7K
- Part D claims, 2023
- 91%
- 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.
Kian Leong, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
6,673 Top 4% higher than 96% 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 certification likely (heuristic, not verified)
Kian Leong, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - 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 Kian Leong, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
6,673 146% vs specialty avg
Specialty distribution in Texas
How Internal 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 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).
Kian Leong, MD appears in the CMS NPPES registry as a Internal Medicine Physician provider holding MD credentials at 1301 W. 38TH ST. #205, Austin, TX, 78705, with a listed phone of (512) 324-1864. NPI 1851307102 was issued on 07/31/2006.
Medicare Part D records for calendar year 2023 show 6,673 prescription claims written by this provider, covering 558 Medicare beneficiaries and totaling roughly $499K in drug spend, split 9% brand-name and 91% generic by claim count, with an opioid prescribing rate of 0.4%.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,858 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 | 1851307102 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 07/31/2006 |
Hospital and facility affiliations
Facilities where Kian Leong, MD bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
Austin Regional Clinic PA
Manor, TX
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Kian Leong, MD. To verify Kian Leong, MD'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
Kian Leong, MD - brand share 9.0%
Internal Medicine Physician average
9% brand-name claims vs 91% generic, on 6,673 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.
6,673
Total Claims
$499K
Total Drug Cost
558
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 15,702
- Total Day Supply
- 463,906
- Brand vs Generic
- 9% brand / 91% generic
- Brand Drug Cost
- $389K
- Generic Drug Cost
- $108K
- Opioid Claims
- 28 (0.4% rate)
- Antibiotic Claims
- 49
Patient Demographics
- Average Patient Age
- 72.7 years
- Avg HCC Risk Score
- 1.10
- Gender Split
- 45% female / 55% male
- Age Distribution
- <65: 30, 65-74: 316, 75-84: 182, 85+: 30
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Kian Leong, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
477 claims
- Amlodipine Besylate
Amlodipine Besylate
414 claims
- Lisinopril
Lisinopril
288 claims
- Levothyroxine Sodium
Levothyroxine Sodium
274 claims
- Losartan Potassium
Losartan Potassium
201 claims
- Metformin Hcl
Metformin Hcl
195 claims
- Trazodone Hcl
Trazodone Hcl
194 claims
- Rosuvastatin Calcium 172
Rosuvastatin Calcium
172 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 477 |
| Amlodipine Besylate | 414 |
| Lisinopril | 288 |
| Levothyroxine Sodium | 274 |
| Losartan Potassium | 201 |
| Metformin Hcl | 195 |
| Trazodone Hcl | 194 |
| Rosuvastatin Calcium | 172 |
| Gabapentin | 150 |
| Metoprolol Succinate | 137 |
* 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 Kian Leong, MD fits within the Internal Medicine Physician landscape nationally.
172,858
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Kian Leong, MD's 6,673 claims are above the specialty average of 2,716.
Nearby Internal Medicine Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Leong.
Dr. Muhammad A. Sattar
MD
Dallas, TX
Anunaya Aashish
Denton, TX
Dr. Queenie Ann Abad
M.D.
San Antonio, TX
Dr. Fuad Abaleka
M.D
Lubbock, TX
Dr. Carol Abalihi
M.D.
El Paso, TX
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 Texas 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.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
Telehealth Guide
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Frequently Asked Questions
What is Kian Leong, MD's specialty? ▼
Kian Leong, MD specializes in Internal Medicine Physician and practices in Austin, Texas. Credentials: MD.
How much does Kian Leong, MD prescribe under Medicare Part D? ▼
In 2023, Kian Leong, MD wrote 6,673 Medicare Part D claims totaling $499K in drug costs for 558 beneficiaries.
Where is Kian Leong, MD located? ▼
Kian Leong, MD is located at 1301 W. 38TH ST. #205, Austin, TX, 78705. Phone: (512) 324-1864.
What is Kian Leong, MD's NPI number? ▼
Kian Leong, MD's National Provider Identifier (NPI) is 1851307102, issued on 07/31/2006.
Does Kian Leong, MD prescribe more brand-name or generic drugs? ▼
Kian Leong, MD's prescribing is 9% brand-name and 91% generic drugs by claim count, with $389K in brand drug costs.
Does Kian Leong, MD prescribe opioids? ▼
Yes, Kian Leong, MD had 28 opioid claims in 2023 with an opioid prescribing rate of 0.4%.
How many Internal Medicine Physician providers are there in the US? ▼
There are 172,858 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 Kian Leong, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Kian Leong, MD's most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Kian Leong, MD accept Medicare? ▼
Kian Leong, MD appears in CMS Medicare data with 6,673 Part D claims and 558 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Kian Leong, MD's credentials? ▼
Kian Leong, MD's NPI is 1851307102 with credentials MD. 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.