NPI registry status
Active
2026 NPPES data Clinical Nurse Specialist NPI 1013979947 CNS/ANP
Verify on CMS → Ann Sienkiel, CNS/ANP
Clinical Nurse Specialist in Temple, 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
119
Medicare Part D claims · 62 beneficiaries · Clinical Nurse Specialist avg: 953
Generic prescribing
66%
generic claims · 34% brand-name · higher generic rates reduce patient out-of-pocket costs
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
Ann Sienkiel, CNS/ANP filed 119 Medicare Part D claims in 2023 as a Clinical Nurse Specialist in Temple, Texas, prescribing 66% generic.
- 119
- Part D claims, 2023
- 66%
- generic prescribing
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.
Ann Sienkiel, CNS/ANP's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
119 35th percentile higher than 35% 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 Ann Sienkiel, CNS/ANP?
Quality data not reportedPrimary specialty
Clinical Nurse Specialist
Medicare Part D claims
119 88% 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).
Ann Sienkiel, CNS/ANP appears in the CMS NPPES registry as a Clinical Nurse Specialist provider holding CNS/ANP credentials at 2401 S 31ST ST, Temple, TX, 76508, with a listed phone of (254) 724-2111. NPI 1013979947 was issued on 04/05/2006.
Medicare Part D records for calendar year 2023 show 119 prescription claims written by this provider, covering 62 Medicare beneficiaries and totaling roughly $38K in drug spend, split 34% brand-name and 66% generic by claim count.
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 | 1013979947 |
|---|---|
| Specialty | Clinical Nurse Specialist |
| Credentials | CNS/ANP |
| Gender | Female |
| NPI Issued | 04/05/2006 |
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 Ann Sienkiel, CNS/ANP. To verify Ann Sienkiel, CNS/ANP'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 · Above average
Ann Sienkiel, CNS/ANP - brand share 34.0%
Clinical Nurse Specialist average
34% brand-name claims vs 66% generic, on 119 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.
119
Total Claims
$38K
Total Drug Cost
62
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 269
- Total Day Supply
- 8,082
- Brand vs Generic
- 34% brand / 66% generic
- Brand Drug Cost
- $35K
- Generic Drug Cost
- $3K
Patient Demographics
- Average Patient Age
- 77.5 years
- Avg HCC Risk Score
- 1.88
- Gender Split
- 56% female / 44% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Eliquis Apixaban | 38 |
| Metoprolol Succinate | 18 |
* 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 Ann Sienkiel, CNS/ANP 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
Ann Sienkiel, CNS/ANP's 119 claims are below 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 Sienkiel.
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.
Healthcare Guides
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Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
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How insurance networks affect your costs
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Frequently Asked Questions
What is Ann Sienkiel, CNS/ANP's specialty? ▼
Ann Sienkiel, CNS/ANP specializes in Clinical Nurse Specialist and practices in Temple, Texas. Credentials: CNS/ANP.
How much does Ann Sienkiel, CNS/ANP prescribe under Medicare Part D? ▼
In 2023, Ann Sienkiel, CNS/ANP wrote 119 Medicare Part D claims totaling $38K in drug costs for 62 beneficiaries.
Where is Ann Sienkiel, CNS/ANP located? ▼
Ann Sienkiel, CNS/ANP is located at 2401 S 31ST ST, Temple, TX, 76508. Phone: (254) 724-2111.
What is Ann Sienkiel, CNS/ANP's NPI number? ▼
Ann Sienkiel, CNS/ANP's National Provider Identifier (NPI) is 1013979947, issued on 04/05/2006.
Does Ann Sienkiel, CNS/ANP prescribe more brand-name or generic drugs? ▼
Ann Sienkiel, CNS/ANP's prescribing is 34% brand-name and 66% generic drugs by claim count, with $35K in brand drug costs.
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 Ann Sienkiel, CNS/ANP prescribe most often? ▼
Based on 2023 Medicare Part D data, Ann Sienkiel, CNS/ANP's most frequently prescribed drugs include Eliquis, Metoprolol Succinate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ann Sienkiel, CNS/ANP accept Medicare? ▼
Ann Sienkiel, CNS/ANP appears in CMS Medicare data with 119 Part D claims and 62 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ann Sienkiel, CNS/ANP's credentials? ▼
Ann Sienkiel, CNS/ANP's NPI is 1013979947 with credentials CNS/ANP. 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.