NPI registry status
Active
2026 NPPES data Clinical Nurse Specialist NPI 1699370346 APRN-CNS
Verify on CMS → Karsyn Stark, APRN-CNS
Clinical Nurse Specialist in Bastrop, 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 1,715 in Clinical Nurse Specialist, 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
3K
Medicare Part D claims · 479 beneficiaries · Clinical Nurse Specialist avg: 953
Generic prescribing
88%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$1.5K
73 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
Karsyn Stark, APRN-CNS filed 2,893 Medicare Part D claims in 2023 as a Clinical Nurse Specialist in Bastrop, Texas, prescribing 88% generic.
- 3K
- Part D claims, 2023
- 88%
- generic prescribing
- $1.5K
- 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.
Karsyn Stark, APRN-CNS's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
2,893 Top 12% higher than 88% 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
What does the federal data show about Karsyn Stark, APRN-CNS?
Quality data not reportedPrimary specialty
Clinical Nurse Specialist
Medicare Part D claims
2,893 204% vs specialty avg
Specialty distribution in Texas
How Clinical Nurse Specialist 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 Clinical Nurse Specialist. 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).
Karsyn Stark, APRN-CNS appears in the CMS NPPES registry as a Clinical Nurse Specialist provider holding APRN-CNS credentials at 3101 HIGHWAY 71 E STE 101, Bastrop, TX, 78602, with a listed phone of (512) 301-0300. NPI 1699370346 was issued on 12/01/2020.
Medicare Part D records for calendar year 2023 show 2,893 prescription claims written by this provider, covering 479 Medicare beneficiaries and totaling roughly $273K in drug spend, split 11% brand-name and 88% generic by claim count, with an opioid prescribing rate of 0.5%.
Clinical Nurse Specialist is a narrow specialty nationwide, with 1,715 enrolled providers across 49 states and an average of 953 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 | 1699370346 |
|---|---|
| Specialty | Clinical Nurse Specialist |
| Credentials | APRN-CNS |
| Gender | Female |
| NPI Issued | 12/01/2020 |
Hospital and facility affiliations
Facilities where Karsyn Stark, APRN-CNS 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.
South Austin Family Practice Clinic, PLLC
Bastrop, 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 Karsyn Stark, APRN-CNS. Source: openpaymentsdata.cms.gov.
Total received
$1.5K
Largest payer
Boehringer Ingelheim Pharmaceuticals, 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 Karsyn Stark, APRN-CNS. To verify Karsyn Stark, APRN-CNS'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
Karsyn Stark, APRN-CNS - brand share 11.0%
Clinical Nurse Specialist average
11% brand-name claims vs 88% generic, on 2,893 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.
2,893
Total Claims
$273K
Total Drug Cost
479
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 6,150
- Total Day Supply
- 170,066
- Brand vs Generic
- 11% brand / 88% generic
- Brand Drug Cost
- $217K
- Generic Drug Cost
- $55K
- Opioid Claims
- 14 (0.5% rate)
- Antibiotic Claims
- 257
Patient Demographics
- Average Patient Age
- 72.1 years
- Avg HCC Risk Score
- 1.22
- Gender Split
- 71% female / 29% male
- Age Distribution
- <65: 50, 65-74: 247, 75-84: 145, 85+: 37
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Karsyn Stark, APRN-CNS prescribes most
Top Medicare Part D drugs by claim count, 2023
- Rosuvastatin Calcium
Rosuvastatin Calcium
178 claims
- Levothyroxine Sodium
Levothyroxine Sodium
159 claims
- Methylprednisolone
Methylprednisolone
125 claims
- Amlodipine Besylate
Amlodipine Besylate
121 claims
- Atorvastatin Calcium
Atorvastatin Calcium
115 claims
- Lisinopril
Lisinopril
109 claims
- Losartan Potassium
Losartan Potassium
89 claims
- Hydrochlorothiazide
Hydrochlorothiazide
80 claims
| Drug | Claims |
|---|---|
| Rosuvastatin Calcium | 178 |
| Levothyroxine Sodium | 159 |
| Methylprednisolone | 125 |
| Amlodipine Besylate | 121 |
| Atorvastatin Calcium | 115 |
| Lisinopril | 109 |
| Losartan Potassium | 89 |
| Hydrochlorothiazide | 80 |
| Doxycycline Hyclate | 79 |
| Gabapentin | 71 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Clinical Nurse Specialist Overview
How Karsyn Stark, APRN-CNS fits within the Clinical Nurse Specialist landscape nationally.
1,715
Clinical Nurse Specialist Providers in US
49
States with Clinical Nurse Specialist
953
Avg Claims per Provider
Karsyn Stark, APRN-CNS's 2,893 claims are above the specialty average of 953.
Nearby Clinical Nurse Specialist Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Stark.
Dr. Lori Allums
ANP-C
Plano, TX
Dr. Norma Applewhite
CNS, RNFA
Dallas, TX
Dr. Hester Arceneaux
CNS, M-C-H (APN)
Missouri City, TX
Dr. Emily Baker
APRN, CNS
Austin, TX
Dr. Grace Balderas
A.P.R.N. B.C.
San Antonio, TX
Compare Clinical Nurse Specialist 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 Clinical Nurse Specialist 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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Understanding Medicare Claims Data
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Frequently Asked Questions
What is Karsyn Stark, APRN-CNS's specialty? ▼
Karsyn Stark, APRN-CNS specializes in Clinical Nurse Specialist and practices in Bastrop, Texas. Credentials: APRN-CNS.
How much does Karsyn Stark, APRN-CNS prescribe under Medicare Part D? ▼
In 2023, Karsyn Stark, APRN-CNS wrote 2,893 Medicare Part D claims totaling $273K in drug costs for 479 beneficiaries.
Where is Karsyn Stark, APRN-CNS located? ▼
Karsyn Stark, APRN-CNS is located at 3101 HIGHWAY 71 E STE 101, Bastrop, TX, 78602. Phone: (512) 301-0300.
What is Karsyn Stark, APRN-CNS's NPI number? ▼
Karsyn Stark, APRN-CNS's National Provider Identifier (NPI) is 1699370346, issued on 12/01/2020.
Does Karsyn Stark, APRN-CNS prescribe more brand-name or generic drugs? ▼
Karsyn Stark, APRN-CNS's prescribing is 11% brand-name and 88% generic drugs by claim count, with $217K in brand drug costs.
Does Karsyn Stark, APRN-CNS prescribe opioids? ▼
Yes, Karsyn Stark, APRN-CNS had 14 opioid claims in 2023 with an opioid prescribing rate of 0.5%.
How many Clinical Nurse Specialist providers are there in the US? ▼
There are 1,715 Clinical Nurse Specialist providers across 49 states in the US. The average Clinical Nurse Specialist provider writes 953 Medicare Part D claims per year.
What drugs does Karsyn Stark, APRN-CNS prescribe most often? ▼
Based on 2023 Medicare Part D data, Karsyn Stark, APRN-CNS's most frequently prescribed drugs include Rosuvastatin Calcium, Levothyroxine Sodium, Methylprednisolone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Karsyn Stark, APRN-CNS accept Medicare? ▼
Karsyn Stark, APRN-CNS appears in CMS Medicare data with 2,893 Part D claims and 479 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Karsyn Stark, APRN-CNS's credentials? ▼
Karsyn Stark, APRN-CNS's NPI is 1699370346 with credentials APRN-CNS. 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.