NPI registry status
Active
2026 NPPES data Critical Care Medicine (Internal Medicine) Physician NPI 1871584540 MD
Verify on CMS → Karin Nicholson, MD
Critical Care Medicine (Internal Medicine) Physician in Fort Hood, 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 6,916 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 · 243 beneficiaries · Critical Care Medicine (Internal Medicine) Physician avg: 1K
Generic prescribing
45%
generic claims · 55% brand-name · higher generic rates reduce patient out-of-pocket costs
Source: CMS Medicare Part D Prescriber Public Use File, 2024
What the federal data shows
Karin Nicholson, MD filed 1,177 Medicare Part D claims in 2024 as a Critical Care Medicine (Internal Medicine) Physician in Fort Hood, Texas, prescribing 45% generic.
- 1K
- Part D claims, 2024
- 45%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥77th
- pct by Part D claim volume (lower-bound band)
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.
Federal trust snapshot
What official records show about Karin Nicholson, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1871584540), first enumerated 11/02/2005.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,177 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- State context
State board disciplinary context
Texas statewide board action statistics are published annually — these figures describe aggregate state activity, not Karin Nicholson, MD's individual license status. Verify directly with the state medical board.
Source: TMB annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1871584540 · Critical Care Medicine (Internal Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-MID · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1871584540
- ENUM-LEGACY 2005
- TAX-MID 7K Critical Care
- RX-MID 1,177
- BOOK-THIN 431 in Texas
- PHOTO-ENUM Joel Kline, MD · 2005
Karin Nicholson, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
1,177 ≥ 77th percentile 77% of 1,416,883 prescribers are in lower value bands
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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2024
✓
Board certification likely (heuristic, not verified)
Karin Nicholson, 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 Karin Nicholson, MD?
Quality data not reportedPrimary specialty
Critical Care Medicine (Internal Medicine) Physician
Medicare Part D claims
1,177 7% 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).
Practice Address
Provider Details
| NPI | 1871584540 |
|---|---|
| Specialty | Critical Care Medicine (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Female |
| NPI Issued | 11/02/2005 |
Hospital and facility affiliations
Facilities where Karin Nicholson, 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.
Southern California Permanente Medical Group
Woodland Hills, CA
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 Karin Nicholson, MD. To verify Karin Nicholson, 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 · Brand-heavy
Karin Nicholson, MD - brand share 55.0%
Critical Care Medicine (Internal Medicine) Physician average
55% brand-name claims vs 45% generic, on 1,177 2024 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 2024.
1,177
Total Claims
$354K
Total Drug Cost
243
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,525.633
- Total Day Supply
- 74,193
- Brand vs Generic
- 55% brand / 45% generic
- Brand Drug Cost
- $284K
- Generic Drug Cost
- $70K
- Antibiotic Claims
- 36
Patient Demographics
- Average Patient Age
- 76.9 years
- Avg HCC Risk Score
- 1.99
- Gender Split
- 54% female / 46% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Karin Nicholson, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Albuterol Sulfate …
Albuterol Sulfate Hfa
276 claims
- Alvesco
Alvesco
144 claims
- Wixela Inhub 104
Wixela Inhub
104 claims
- Breyna 98
Breyna
98 claims
- Prednisone 96
Prednisone
96 claims
- Spiriva Respimat 93
Spiriva Respimat
93 claims
- Stiolto Respimat 63
Stiolto Respimat
63 claims
- Ipratropium Bromide 42
Ipratropium Bromide
42 claims
| Drug | Claims |
|---|---|
| Albuterol Sulfate Hfa Albuterol Sulfate | 276 |
| Alvesco Ciclesonide | 144 |
| Wixela Inhub Fluticasone Propion/Salmeterol | 104 |
| Breyna Budesonide/Formoterol Fumarate | 98 |
| Prednisone | 96 |
| Spiriva Respimat Tiotropium Bromide | 93 |
| Stiolto Respimat Tiotropium Br/Olodaterol Hcl | 63 |
| Ipratropium Bromide | 42 |
| Trelegy Ellipta Fluticasone/Umeclidin/Vilanter | 29 |
| Azithromycin | 27 |
* 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 Karin Nicholson, MD fits within the Critical Care Medicine (Internal Medicine) Physician landscape nationally.
6,916
Critical Care Medicine (Internal Medicine) Physician Providers in US
53
States with Critical Care Medicine (Internal Medicine) Physician
1,103
Avg Claims per Provider
Karin Nicholson, MD's 1,177 claims are above the specialty average of 1,103.
Nationwide Critical Care Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Nicholson, both outside Texas so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
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 Nicholson.
One of 431 Critical Care Medicine (Internal Medicine) Physician providers enrolled in Texas, 5 are shown here.
Frequently Asked Questions
What is Karin Nicholson, MD's specialty? ▼
Karin Nicholson, MD specializes in Critical Care Medicine (Internal Medicine) Physician and practices in Fort Hood, Texas. Credentials: MD.
How much does Karin Nicholson, MD prescribe under Medicare Part D? ▼
In 2024, Karin Nicholson, MD wrote 1,177 Medicare Part D claims totaling $354K in drug costs for 243 beneficiaries.
Where is Karin Nicholson, MD located? ▼
Karin Nicholson, MD is located at 36000 DARNALL LOOP, Fort Hood, TX, 76544. Phone: (254) 288-8921.
What is Karin Nicholson, MD's NPI number? ▼
Karin Nicholson, MD's National Provider Identifier (NPI) is 1871584540, issued on 11/02/2005.
Does Karin Nicholson, MD prescribe more brand-name or generic drugs? ▼
Karin Nicholson, MD's prescribing is 55% brand-name and 45% generic drugs by claim count, with $284K in brand drug costs.
How many Critical Care Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 6,916 Critical Care Medicine (Internal Medicine) Physician providers across 53 states in the US. The average Critical Care Medicine (Internal Medicine) Physician provider writes 1,103 Medicare Part D claims per year.
What drugs does Karin Nicholson, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Karin Nicholson, MD's most frequently prescribed drugs include Albuterol Sulfate Hfa, Alvesco, Wixela Inhub. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Karin Nicholson, MD accept Medicare? ▼
Karin Nicholson, MD appears in CMS Medicare data with 1,177 Part D claims and 243 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Karin Nicholson, MD's credentials? ▼
Karin Nicholson, MD's NPI is 1871584540 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 (2024). 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 August 2026 (NPPES) / 2024 (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
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 August 2026.