NPI registry status
Active
2026 NPPES data Physician Assistant NPI 1538268016 PA
Verify on CMS → Eileen Kalk, PA
Physician Assistant in Kelseyville, California.
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
246
Medicare Part D claims · 145 beneficiaries · Physician Assistant avg: 790
Generic prescribing
81%
generic claims · 14% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
82.4/100
▼ 1 pts below national avg 83.5 · Above neutral
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Eileen Kalk, PA reported a CMS MIPS final score of 82.4/100 - below the 83.5 national average - and filed 246 Medicare Part D claims in 2023.
- 82.4/100
- MIPS score · -1 vs avg
- 246
- Part D claims, 2023
- 81%
- generic prescribing
- ≥36th
- pct among measured MIPS (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.
Eileen Kalk, PA's MIPS score vs every measured U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure. Clinicians whose score CMS assigned without scoring any category are excluded.
82 ≥ 36th percentile 36% of 454,083 measured providers are in lower value bands
Each bar is a band; taller bars hold more measured providers. 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 whole-score-point band: it counts only measured clinicians in lower score bands. A CMS MIPS metric is not a recommendation or a clinical-quality rating by PlainDoctor. See methodology § corpus placement.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Eileen Kalk, PA sits
This provider among physician assistant peers
Across the 26,497 physician assistant providers who report both Medicare Part D prescribing and a MIPS quality score, Eileen Kalk, PA writes more Part D claims than 51% of them and scores higher on MIPS quality than 36% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one physician assistant peer from a representative sample of 60; the gold marker is Eileen Kalk, PA. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Eileen Kalk, PA?
Near national averagePrimary specialty
Physician Assistant
Medicare Part D claims
246 69% vs specialty avg
MIPS final score
82.4/100 1.1 pts vs avg
Specialty distribution in California
How Physician Assistant compares to other specialties among California providers
Medicare quality performance, MIPS
Eileen Kalk, PA's 2023 MIPS final score plotted against the Physician Assistant national average
- MIPS Final Score
- 82.4/100
- vs 83.5 national avg · 2023 performance year
MIPS final score (Physician Assistant) - 82.4/100 vs national avg 83.5
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).
Eileen Kalk, PA appears in the CMS NPPES registry as a Physician Assistant provider holding PA credentials at 4135 MAIN ST, Kelseyville, CA, 95451, with a listed phone of (707) 279-1888. NPI 1538268016 was issued on 09/21/2006.
Medicare Part D records for calendar year 2023 show 246 prescription claims written by this provider, covering 145 Medicare beneficiaries and totaling roughly $18K in drug spend, split 14% brand-name and 81% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 82.4/100 for the 2023 performance year (Quality 84.6, Cost 30.8), compared with the 83.5 average among clinicians with a measured score.
Physician Assistant is a high-volume specialty nationwide, with 150,974 enrolled providers across 56 states and an average of 790 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 | 1538268016 |
|---|---|
| Specialty | Physician Assistant |
| Credentials | PA |
| Gender | Female |
| NPI Issued | 09/21/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
82.3701
Final Score
Measured-score avg: 83.5
84.588
Quality
30.787
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Eileen Kalk, PA 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.
Sutter Bay Hospitals
Lakeport, CA
Sutter Lakeside Home Medical Services
Lakeport, 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 - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Eileen Kalk, PA. To verify Eileen Kalk, PA's current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Eileen Kalk, PA - brand share 14.0%
Physician Assistant average
14% brand-name claims vs 81% generic, on 246 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.
246
Total Claims
$18K
Total Drug Cost
145
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 391
- Total Day Supply
- 9,424
- Brand vs Generic
- 14% brand / 81% generic
- Brand Drug Cost
- $12K
- Generic Drug Cost
- $6K
- Antibiotic Claims
- 63
Patient Demographics
- Average Patient Age
- 73.2 years
- Avg HCC Risk Score
- 1.19
- Gender Split
- 64% female / 36% 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 |
|---|---|
| Azithromycin | 33 |
| Albuterol Sulfate Hfa Albuterol Sulfate | 12 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Physician Assistant Overview
How Eileen Kalk, PA fits within the Physician Assistant landscape nationally.
150,974
Physician Assistant Providers in US
56
States with Physician Assistant
790
Avg Claims per Provider
Eileen Kalk, PA's 246 claims are below the specialty average of 790.
Nearby Physician Assistant Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Kalk.
Dr. Marcia -Galbraith
PA
Stockton, CA
Dr. Danny Abad
PA
Orange, CA
Dr. Lea Dominique Abadies
PA
Tustin, CA
Dr. Rea Elizabeth Abaniel
P.A.-C
Seal Beach, CA
Dr. Ramina Abbasi
PA-C
Signal Hill, CA
Compare Physician Assistant 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 California medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Physician Assistant 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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Medical Specialties Explained
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Understanding Medicare Claims Data
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Frequently Asked Questions
What is Eileen Kalk, PA's specialty? ▼
Eileen Kalk, PA specializes in Physician Assistant and practices in Kelseyville, California. Credentials: PA.
How much does Eileen Kalk, PA prescribe under Medicare Part D? ▼
In 2023, Eileen Kalk, PA wrote 246 Medicare Part D claims totaling $18K in drug costs for 145 beneficiaries.
What is Eileen Kalk, PA's Medicare quality score? ▼
Eileen Kalk, PA has a CMS MIPS Final Score of 82.4/100 (Quality: 84.6, Cost: 30.8). The average MIPS Final Score across the 454,083 clinicians with at least one published category score is 83.5; clinicians whose score CMS assigned without scoring any category are excluded from that average. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Eileen Kalk, PA located? ▼
Eileen Kalk, PA is located at 4135 MAIN ST, Kelseyville, CA, 95451. Phone: (707) 279-1888.
What is Eileen Kalk, PA's NPI number? ▼
Eileen Kalk, PA's National Provider Identifier (NPI) is 1538268016, issued on 09/21/2006.
Does Eileen Kalk, PA prescribe more brand-name or generic drugs? ▼
Eileen Kalk, PA's prescribing is 14% brand-name and 81% generic drugs by claim count, with $12K in brand drug costs.
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.
What drugs does Eileen Kalk, PA prescribe most often? ▼
Based on 2023 Medicare Part D data, Eileen Kalk, PA's most frequently prescribed drugs include Azithromycin, Albuterol Sulfate Hfa. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Eileen Kalk, PA accept Medicare? ▼
Eileen Kalk, PA appears in CMS Medicare data with 246 Part D claims and 145 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Eileen Kalk, PA's credentials? ▼
Eileen Kalk, PA's NPI is 1538268016 with credentials PA. 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.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- 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.