NPI registry status
Active
2026 NPPES data Internal Medicine Physician NPI 1437224912 MD
Verify on CMS → Aaron Maxwell, 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 172,737 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
6K
Medicare Part D claims · 540 beneficiaries · Internal Medicine Physician avg: 3K
Generic prescribing
89%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$57.55
3 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
Aaron Maxwell, MD filed 5,601 Medicare Part D claims in 2023 as a Internal Medicine Physician in Austin, Texas, prescribing 89% generic.
- 6K
- Part D claims, 2023
- 89%
- generic prescribing
- $57.55
- industry payments (Sunshine Act)
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.
Aaron Maxwell, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
5,601 Top 5% higher than 95% 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)
Aaron Maxwell, MD 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 Aaron Maxwell, MD?
Quality data not reportedPrimary specialty
Internal Medicine Physician
Medicare Part D claims
5,601 106% 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).
Aaron Maxwell, MD appears in the CMS NPPES registry as an Internal Medicine Physician provider holding MD credentials at 1004 W 32ND ST STE 400, Austin, TX, 78705, with a listed phone of (512) 454-5171. NPI 1437224912 was issued on 11/21/2006.
Medicare Part D records for calendar year 2023 show 5,601 prescription claims written by this provider, covering 540 Medicare beneficiaries and totaling roughly $428K in drug spend, split 10% brand-name and 89% generic by claim count, with an opioid prescribing rate of 0.4%.
Internal Medicine Physician is a high-volume specialty nationwide, with 172,737 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 | 1437224912 |
|---|---|
| Specialty | Internal Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 11/21/2006 |
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 Aaron Maxwell, MD. Source: openpaymentsdata.cms.gov.
Total received
$58
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 Aaron Maxwell, MD. To verify Aaron Maxwell, 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 · Typical
Aaron Maxwell, MD - brand share 10.0%
Internal Medicine Physician average
10% brand-name claims vs 89% generic, on 5,601 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.
5,601
Total Claims
$428K
Total Drug Cost
540
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 13,061
- Total Day Supply
- 384,188
- Brand vs Generic
- 10% brand / 89% generic
- Brand Drug Cost
- $329K
- Generic Drug Cost
- $98K
- Opioid Claims
- 24 (0.4% rate)
- Antibiotic Claims
- 115
Patient Demographics
- Average Patient Age
- 75.3 years
- Avg HCC Risk Score
- 0.90
- Gender Split
- 48% female / 52% male
- Age Distribution
- <65: 11, 65-74: 258, 75-84: 203, 85+: 68
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Aaron Maxwell, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
608 claims
- Levothyroxine Sodium
Levothyroxine Sodium
353 claims
- Amlodipine Besylate
Amlodipine Besylate
334 claims
- Lisinopril 232
Lisinopril
232 claims
- Escitalopram Oxalate 198
Escitalopram Oxalate
198 claims
- Trazodone Hcl 179
Trazodone Hcl
179 claims
- Rosuvastatin Calcium 178
Rosuvastatin Calcium
178 claims
- Losartan Potassium 140
Losartan Potassium
140 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 608 |
| Levothyroxine Sodium | 353 |
| Amlodipine Besylate | 334 |
| Lisinopril | 232 |
| Escitalopram Oxalate | 198 |
| Trazodone Hcl | 179 |
| Rosuvastatin Calcium | 178 |
| Losartan Potassium | 140 |
| Tamsulosin Hcl | 133 |
| Omeprazole | 122 |
* 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 Aaron Maxwell, MD fits within the Internal Medicine Physician landscape nationally.
172,737
Internal Medicine Physician Providers in US
56
States with Internal Medicine Physician
2,716
Avg Claims per Provider
Aaron Maxwell, MD's 5,601 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 Maxwell.
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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Understanding Medicare Claims Data
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How insurance networks affect your costs
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Frequently Asked Questions
What is Aaron Maxwell, MD's specialty? ▼
Aaron Maxwell, MD specializes in Internal Medicine Physician and practices in Austin, Texas. Credentials: MD.
How much does Aaron Maxwell, MD prescribe under Medicare Part D? ▼
In 2023, Aaron Maxwell, MD wrote 5,601 Medicare Part D claims totaling $428K in drug costs for 540 beneficiaries.
Where is Aaron Maxwell, MD located? ▼
Aaron Maxwell, MD is located at 1004 W 32ND ST STE 400, Austin, TX, 78705. Phone: (512) 454-5171.
What is Aaron Maxwell, MD's NPI number? ▼
Aaron Maxwell, MD's National Provider Identifier (NPI) is 1437224912, issued on 11/21/2006.
Does Aaron Maxwell, MD prescribe more brand-name or generic drugs? ▼
Aaron Maxwell, MD's prescribing is 10% brand-name and 89% generic drugs by claim count, with $329K in brand drug costs.
Does Aaron Maxwell, MD prescribe opioids? ▼
Yes, Aaron Maxwell, MD had 24 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 172,737 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 Aaron Maxwell, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Aaron Maxwell, MD's most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Aaron Maxwell, MD accept Medicare? ▼
Aaron Maxwell, MD appears in CMS Medicare data with 5,601 Part D claims and 540 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Aaron Maxwell, MD's credentials? ▼
Aaron Maxwell, MD's NPI is 1437224912 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.