NPI registry status
Active
2026 NPPES data Medical Physician Assistant NPI 1134479926 PA-C
Verify on CMS → Khou Xiong, PA-C
Medical Physician Assistant in La Crosse, Wisconsin.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 40,580 in Medical 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
2K
Medicare Part D claims · 102 beneficiaries · Medical Physician Assistant avg: 1K
Generic prescribing
71%
generic claims · 27% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
89.7/100
▲ 7 pts above national avg 83.1 · Exceptional
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
Khou Xiong, PA-C reported a CMS MIPS final score of 89.7/100 - above the 83.1 national average - and filed 2,179 Medicare Part D claims in 2023.
- 89.7/100
- MIPS score · +7 vs avg
- 2K
- Part D claims, 2023
- 71%
- 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.
Khou Xiong, PA-C's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
90 Top 42% higher than 58% of 477,587 scored providers
Each bar is a band; taller bars hold more scored 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.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Khou Xiong, PA-C sits
This provider among medical physician assistant peers
Across the 7,339 medical physician assistant providers who report both Medicare Part D prescribing and a MIPS quality score, Khou Xiong, PA-C writes more Part D claims than 87% of them and scores higher on MIPS quality than 58% - placing this provider in the high-volume, high-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 medical physician assistant peer from a representative sample of 60; the gold marker is Khou Xiong, PA-C. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
What does the federal data show about Khou Xiong, PA-C?
High performer (top quartile)Primary specialty
Medical Physician Assistant
Medicare Part D claims
2,179 102% vs specialty avg
MIPS final score
89.7/100 6.6 pts vs avg
Specialty distribution in Wisconsin
How Medical Physician Assistant compares to other specialties among Wisconsin providers
Medicare quality performance, MIPS
Khou Xiong, PA-C's 2023 MIPS final score plotted against the Medical Physician Assistant national average
- MIPS Final Score
- 89.7/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Medical Physician Assistant) - 89.7/100 vs national avg 83.1
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).
Khou Xiong, PA-C appears in the CMS NPPES registry as a Medical Physician Assistant provider holding PA-C credentials at 700 WEST AVE S, La Crosse, WI, 54601, with a listed phone of (608) 785-0940. NPI 1134479926 was issued on 09/19/2012.
Medicare Part D records for calendar year 2023 show 2,179 prescription claims written by this provider, covering 102 Medicare beneficiaries and totaling roughly $316K in drug spend, split 27% brand-name and 71% generic by claim count, with an opioid prescribing rate of 4.1%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 89.7/100 for the 2023 performance year (Quality 81.2), compared with the national average of 83.1.
Medical Physician Assistant is a mid-sized specialty nationwide, with 40,580 enrolled providers across 55 states and an average of 1,077 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 | 1134479926 |
|---|---|
| Specialty | Medical Physician Assistant |
| Credentials | PA-C |
| Gender | Female |
| NPI Issued | 09/19/2012 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
89.6808
Final Score
Avg: 83.1
81.2378
Quality
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Khou Xiong, 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.
Red Cliff Band OF Lake Superior Chippewa Indians
Bayfield, WI
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
Brand vs generic prescribing mix · Above average
Khou Xiong, PA-C - brand share 27.0%
Medical Physician Assistant average
27% brand-name claims vs 71% generic, on 2,179 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.
2,179
Total Claims
$316K
Total Drug Cost
102
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 3,639
- Total Day Supply
- 102,962
- Brand vs Generic
- 27% brand / 71% generic
- Brand Drug Cost
- $284K
- Generic Drug Cost
- $30K
- Opioid Claims
- 90 (4.1% rate)
- Antibiotic Claims
- 46
Patient Demographics
- Average Patient Age
- 66.8 years
- Avg HCC Risk Score
- 1.44
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 25, 65-74: 55, 75-84: N/A, 85+: N/A
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Khou Xiong, PA-C prescribes most
Top Medicare Part D drugs by claim count, 2023
- Gabapentin
Gabapentin
123 claims
- Atorvastatin Calcium
Atorvastatin Calcium
102 claims
- Lisinopril
Lisinopril
75 claims
- Omeprazole
Omeprazole
69 claims
- Advair Diskus
Advair Diskus
58 claims
- Metoprolol Succinate
Metoprolol Succinate
53 claims
- Metformin Hcl 49
Metformin Hcl
49 claims
- Levothyroxine Sodium 38
Levothyroxine Sodium
38 claims
| Drug | Claims |
|---|---|
| Gabapentin | 123 |
| Atorvastatin Calcium | 102 |
| Lisinopril | 75 |
| Omeprazole | 69 |
| Advair Diskus Fluticasone Propion/Salmeterol | 58 |
| Metoprolol Succinate | 53 |
| Metformin Hcl | 49 |
| Levothyroxine Sodium | 38 |
| Pregabalin | 38 |
| Amlodipine Besylate | 36 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Medical Physician Assistant Overview
How Khou Xiong, PA-C fits within the Medical Physician Assistant landscape nationally.
40,580
Medical Physician Assistant Providers in US
55
States with Medical Physician Assistant
1,077
Avg Claims per Provider
Khou Xiong, PA-C's 2,179 claims are above the specialty average of 1,077.
Nearby Medical Physician Assistant Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Xiong.
Dr. Carmen Adams
PA
Sparta, WI
Dr. Darian Adler
PA-C
La Crosse, WI
Dr. Sarah Affeldt
PAC
Madison, WI
Dr. Susan Ahn-Horvath
PA
Marshfield, WI
Olukemi Ajibola
Mequon, WI
Compare Medical 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 Wisconsin medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Medical 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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Frequently Asked Questions
What is Khou Xiong, PA-C's specialty? ▼
Khou Xiong, PA-C specializes in Medical Physician Assistant and practices in La Crosse, Wisconsin. Credentials: PA-C.
How much does Khou Xiong, PA-C prescribe under Medicare Part D? ▼
In 2023, Khou Xiong, PA-C wrote 2,179 Medicare Part D claims totaling $316K in drug costs for 102 beneficiaries.
What is Khou Xiong, PA-C's Medicare quality score? ▼
Khou Xiong, PA-C has a CMS MIPS Final Score of 89.7/100 (Quality: 81.2). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Khou Xiong, PA-C located? ▼
Khou Xiong, PA-C is located at 700 WEST AVE S, La Crosse, WI, 54601. Phone: (608) 785-0940.
What is Khou Xiong, PA-C's NPI number? ▼
Khou Xiong, PA-C's National Provider Identifier (NPI) is 1134479926, issued on 09/19/2012.
Does Khou Xiong, PA-C prescribe more brand-name or generic drugs? ▼
Khou Xiong, PA-C's prescribing is 27% brand-name and 71% generic drugs by claim count, with $284K in brand drug costs.
Does Khou Xiong, PA-C prescribe opioids? ▼
Yes, Khou Xiong, PA-C had 90 opioid claims in 2023 with an opioid prescribing rate of 4.1%.
How many Medical Physician Assistant providers are there in the US? ▼
There are 40,580 Medical Physician Assistant providers across 55 states in the US. The average Medical Physician Assistant provider writes 1,077 Medicare Part D claims per year.
What drugs does Khou Xiong, PA-C prescribe most often? ▼
Based on 2023 Medicare Part D data, Khou Xiong, PA-C's most frequently prescribed drugs include Gabapentin, Atorvastatin Calcium, Lisinopril. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Khou Xiong, PA-C accept Medicare? ▼
Khou Xiong, PA-C appears in CMS Medicare data with 2,179 Part D claims and 102 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Khou Xiong, PA-C's credentials? ▼
Khou Xiong, PA-C's NPI is 1134479926 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.
- 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
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.