NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1033551114 PA-C
Verify on CMS → Karissa Zimmer, PA-C
Physician Assistant in Sioux Falls, South Dakota.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 150,974 in Physician Assistant, 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
48
Medicare Part D claims · Physician Assistant avg: 790
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Karissa Zimmer, PA-C filed 48 Medicare Part D claims in 2023 as a Physician Assistant in Sioux Falls, South Dakota.
- 48
- Part D claims, 2023
- ≥0th
- 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.
CMS NPPES provider registry desk
NPI 1033551114 · Physician Assistant
NPI-10 · ENUM-MID · TAX-MEGA · RX-TRACE · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1033551114
- ENUM-MID 2013
- TAX-MEGA 151K Physician Assistant
- RX-TRACE 48
- BOOK-LIGHT 628 in South Dakota
- PHOTO-ENUM Brian Robinson · 2013
Karissa Zimmer, PA-C's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
48 ≥ 0th percentile 0% of 1,370,886 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 · 2023
What does the federal data show about Karissa Zimmer, PA-C?
Quality data not reportedPrimary specialty
Physician Assistant
Medicare Part D claims
48 94% vs specialty avg
Specialty distribution in South Dakota
How Physician Assistant compares to other specialties among South Dakota 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 Physician Assistant. 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 | 1033551114 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA-C |
| Gender | Female |
| NPI Issued | 07/18/2013 |
Hospital and facility affiliations
Facilities where Karissa Zimmer, PA-C 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.
Avera Mckennan
Sioux Falls, SD
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
48
Total Claims
$454
Total Drug Cost
N/A
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 60
- Total Day Supply
- 1,692
- Brand Drug Cost
- $0
- Generic Drug Cost
- $454
Patient Demographics
- Average Patient Age
- 67.0 years
- Avg HCC Risk Score
- 0.91
Physician Assistant Overview
How Karissa Zimmer, PA-C fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Karissa Zimmer, PA-C's 48 claims are below the specialty average of 790.
Nationwide Physician Assistant peers with similar MIPS or enrollment year
Two federal-record peer sets for Zimmer, both outside South Dakota so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2013)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Physician Assistant Providers in South Dakota
Other clinicians with the same primary specialty enrolled in South Dakota, drawn from the same CMS NPPES roster as Zimmer.
One of 628 Physician Assistant providers enrolled in South Dakota, 5 are shown here.
Dr. Michael Aanderud
PA-C
Rapid City, SD
Dr. Benjamin Abbey
PA-C
Mitchell, SD
Dr. Julia Abraham
PA-C
Dell Rapids, SD
Riley Ackerman
Rapid City, SD
Dr. Amanda Adams
PA-C
Huron, SD
Compare Physician Assistant nationally: see state-by-state distribution →
Frequently Asked Questions
What is Karissa Zimmer, PA-C's specialty? ▼
Karissa Zimmer, PA-C specializes in Physician Assistant and practices in Sioux Falls, South Dakota. Credentials: PA-C.
How much does Karissa Zimmer, PA-C prescribe under Medicare Part D? ▼
In 2023, Karissa Zimmer, PA-C wrote 48 Medicare Part D claims totaling $454 in drug costs for N/A beneficiaries.
Where is Karissa Zimmer, PA-C located? ▼
Karissa Zimmer, PA-C is located at 2315 W. 57TH STREET, Sioux Falls, SD, 57108. Phone: (615) 271-5441.
What is Karissa Zimmer, PA-C's NPI number? ▼
Karissa Zimmer, PA-C's National Provider Identifier (NPI) is 1033551114, issued on 07/18/2013.
How many Physician Assistant providers are there in the US? ▼
There are 150,974 Physician Assistant providers across 56 states in the US. The average Physician Assistant provider writes 790 Medicare Part D claims per year.
Does Karissa Zimmer, PA-C accept Medicare? ▼
Karissa Zimmer, PA-C appears in CMS Medicare data with 48 Part D claims and N/A Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Karissa Zimmer, PA-C's credentials? ▼
Karissa Zimmer, PA-C's NPI is 1033551114 with credentials PA-C. 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
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.