NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1730475955 D.O.
Verify on CMS → Ernest James Kahn, D.O.
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 · 519 beneficiaries · Internal Medicine Physician avg: 3K
Industry payments
$267.71
13 payments · CMS Open Payments (Sunshine Act)
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Ernest James Kahn, D.O. filed 6,942 Medicare Part D claims in 2023 as a Internal Medicine Physician in Austin, Texas.
- 7K
- Part D claims, 2023
- 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.
Ernest James Kahn, D.O.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
6,942 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)
Ernest James Kahn, D.O. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 3 hospital affiliations - 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 Ernest James Kahn, D.O.?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
6,942 156% 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).
Ernest James Kahn, D.O. appears in the CMS NPPES registry as a Internal Medicine Physician provider holding D.O. credentials at 7000 N MO PAC EXPY, Austin, TX, 78731, with a listed phone of (512) 482-0045. NPI 1730475955 was issued on 06/27/2011.
Medicare Part D records for calendar year 2023 show 6,942 prescription claims written by this provider, covering 519 Medicare beneficiaries and totaling roughly $490K in drug spend, with an opioid prescribing rate of 7.3%.
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 | 1730475955 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | D.O. |
| Gender | Male |
| NPI Issued | 06/27/2011 |
Hospital and facility affiliations
Facilities where Ernest James Kahn, D.O. 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.
According to CMS billing records, Ernest James Kahn, D.O. is affiliated with 3 Medicare-billing facilities.
Hospital Internists OF Texas LLC
Austin, TX
Hospitalist Medicine Physicians OF Texas PLLC
Frederickburg, TX
Privia Medical Group Gulf Coast PLLC
Austin, 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).
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 Ernest James Kahn, D.O.. Source: openpaymentsdata.cms.gov.
Total received
$268
Largest payer
Novo Nordisk 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 Ernest James Kahn, D.O.. To verify Ernest James Kahn, D.O.'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
6,942
Total Claims
$490K
Total Drug Cost
519
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 7,011
- Total Day Supply
- 129,415
- Generic Drug Cost
- $129K
- Opioid Claims
- 505 (7.3% rate)
- Antibiotic Claims
- 323
Patient Demographics
- Average Patient Age
- 73.5 years
- Avg HCC Risk Score
- 1.52
- Gender Split
- 55% female / 45% male
- Age Distribution
- <65: 32, 65-74: 259, 75-84: 199, 85+: 29
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ernest James Kahn, D.O. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
329 claims
- Ondansetron Odt
Ondansetron Odt
285 claims
- Amlodipine Besylate
Amlodipine Besylate
262 claims
- Celecoxib
Celecoxib
214 claims
- Lisinopril
Lisinopril
211 claims
- Pantoprazole Sodium
Pantoprazole Sodium
179 claims
- Tramadol Hcl
Tramadol Hcl
162 claims
- Trazodone Hcl
Trazodone Hcl
138 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 329 |
| Ondansetron Odt Ondansetron | 285 |
| Amlodipine Besylate | 262 |
| Celecoxib | 214 |
| Lisinopril | 211 |
| Pantoprazole Sodium | 179 |
| Tramadol Hcl | 162 |
| Trazodone Hcl | 138 |
| Donepezil Hcl | 131 |
| Gabapentin | 131 |
* 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 Ernest James Kahn, D.O. 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
Ernest James Kahn, D.O.'s 6,942 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 Kahn.
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
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Understanding Medicare Claims Data
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Frequently Asked Questions
What is Ernest James Kahn, D.O.'s specialty? ▼
Ernest James Kahn, D.O. specializes in Internal Medicine Physician and practices in Austin, Texas. Credentials: D.O..
How much does Ernest James Kahn, D.O. prescribe under Medicare Part D? ▼
In 2023, Ernest James Kahn, D.O. wrote 6,942 Medicare Part D claims totaling $490K in drug costs for 519 beneficiaries.
Where is Ernest James Kahn, D.O. located? ▼
Ernest James Kahn, D.O. is located at 7000 N MO PAC EXPY, Austin, TX, 78731. Phone: (512) 482-0045.
What is Ernest James Kahn, D.O.'s NPI number? ▼
Ernest James Kahn, D.O.'s National Provider Identifier (NPI) is 1730475955, issued on 06/27/2011.
Does Ernest James Kahn, D.O. prescribe opioids? ▼
Yes, Ernest James Kahn, D.O. had 505 opioid claims in 2023 with an opioid prescribing rate of 7.3%.
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 Ernest James Kahn, D.O. prescribe most often? ▼
Based on 2023 Medicare Part D data, Ernest James Kahn, D.O.'s most frequently prescribed drugs include Atorvastatin Calcium, Ondansetron Odt, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ernest James Kahn, D.O. accept Medicare? ▼
Ernest James Kahn, D.O. appears in CMS Medicare data with 6,942 Part D claims and 519 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ernest James Kahn, D.O.'s credentials? ▼
Ernest James Kahn, D.O.'s NPI is 1730475955 with credentials D.O.. 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.