NPI registry status
Active
2026 NPPES data Critical Care Medicine (Internal Medicine) Physician NPI 1326083288 MD
Verify on CMS → Louis Hamer, MD
Critical Care Medicine (Internal Medicine) Physician in Pasadena, 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 6,631 in Critical Care Medicine (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
1K
Medicare Part D claims · 295 beneficiaries · Critical Care Medicine (Internal Medicine) Physician avg: 1K
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Louis Hamer, MD filed 1,398 Medicare Part D claims in 2023 as a Critical Care Medicine (Internal Medicine) Physician in Pasadena, Texas.
- 1K
- Part D claims, 2023
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.
Louis Hamer, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,398 Top 21% higher than 79% 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)
Louis Hamer, 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 Louis Hamer, MD?
Quality data not reportedPrimary specialty
Critical Care Medicine (Internal Medicine) Physician
Medicare Part D claims
1,398 31% vs specialty avg
Specialty distribution in Texas
How Critical Care Medicine (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 Critical Care Medicine (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).
Louis Hamer, MD appears in the CMS NPPES registry as a Critical Care Medicine (Internal Medicine) Physician provider holding MD credentials at 5010 CRENSHAW, Pasadena, TX, 77505, with a listed phone of (832) 399-0399. NPI 1326083288 was issued on 06/17/2006.
Medicare Part D records for calendar year 2023 show 1,398 prescription claims written by this provider, covering 295 Medicare beneficiaries and totaling roughly $567K in drug spend.
Critical Care Medicine (Internal Medicine) Physician is a mid-sized specialty nationwide, with 6,631 enrolled providers across 53 states and an average of 1,069 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 | 1326083288 |
|---|---|
| Specialty | Critical Care Medicine (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 06/17/2006 |
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 Louis Hamer, MD. To verify Louis Hamer, 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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
1,398
Total Claims
$567K
Total Drug Cost
295
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,326
- Total Day Supply
- 61,385
- Generic Drug Cost
- $90K
- Antibiotic Claims
- 171
Patient Demographics
- Average Patient Age
- 72.5 years
- Avg HCC Risk Score
- 1.97
- Gender Split
- 63% female / 37% male
- Age Distribution
- <65: 40, 65-74: 131, 75-84: 99, 85+: 25
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Louis Hamer, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Albuterol Sulfate …
Albuterol Sulfate Hfa
272 claims
- Prednisone
Prednisone
158 claims
- Trelegy Ellipta
Trelegy Ellipta
122 claims
- Symbicort 98
Symbicort
98 claims
- Azithromycin 79
Azithromycin
79 claims
- Cefdinir 67
Cefdinir
67 claims
- Fluticasone Propio… 67
Fluticasone Propionate
67 claims
- Breo Ellipta 62
Breo Ellipta
62 claims
| Drug | Claims |
|---|---|
| Albuterol Sulfate Hfa Albuterol Sulfate | 272 |
| Prednisone | 158 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 122 |
| Symbicort Budesonide/Formoterol Fumarate | 98 |
| Azithromycin | 79 |
| Cefdinir | 67 |
| Fluticasone Propionate | 67 |
| Breo Ellipta Fluticasone/Vilanterol | 62 |
| Combivent Respimat Ipratropium/Albuterol Sulfate | 41 |
| Pantoprazole Sodium | 38 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Critical Care Medicine (Internal Medicine) Physician in TX →
All providers in Texas →
Compare specialties →
Critical Care Medicine (Internal Medicine) Physician Overview
How Louis Hamer, MD fits within the Critical Care Medicine (Internal Medicine) Physician landscape nationally.
6,631
Critical Care Medicine (Internal Medicine) Physician Providers in US
53
States with Critical Care Medicine (Internal Medicine) Physician
1,069
Avg Claims per Provider
Louis Hamer, MD's 1,398 claims are above the specialty average of 1,069.
Nearby Critical Care Medicine (Internal Medicine) Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Hamer.
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 Critical Care Medicine (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.
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Frequently Asked Questions
What is Louis Hamer, MD's specialty? ▼
Louis Hamer, MD specializes in Critical Care Medicine (Internal Medicine) Physician and practices in Pasadena, Texas. Credentials: MD.
How much does Louis Hamer, MD prescribe under Medicare Part D? ▼
In 2023, Louis Hamer, MD wrote 1,398 Medicare Part D claims totaling $567K in drug costs for 295 beneficiaries.
Where is Louis Hamer, MD located? ▼
Louis Hamer, MD is located at 5010 CRENSHAW, Pasadena, TX, 77505. Phone: (832) 399-0399.
What is Louis Hamer, MD's NPI number? ▼
Louis Hamer, MD's National Provider Identifier (NPI) is 1326083288, issued on 06/17/2006.
How many Critical Care Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 6,631 Critical Care Medicine (Internal Medicine) Physician providers across 53 states in the US. The average Critical Care Medicine (Internal Medicine) Physician provider writes 1,069 Medicare Part D claims per year.
What drugs does Louis Hamer, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Louis Hamer, MD's most frequently prescribed drugs include Albuterol Sulfate Hfa, Prednisone, Trelegy Ellipta. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Louis Hamer, MD accept Medicare? ▼
Louis Hamer, MD appears in CMS Medicare data with 1,398 Part D claims and 295 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Louis Hamer, MD's credentials? ▼
Louis Hamer, MD's NPI is 1326083288 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.