NPI registry status
Active
2026 NPPES data Family Medicine Physician NPI 1871583229 MD
Verify on CMS → Christopher Knox, MD
Family Medicine Physician in Harrison, Arkansas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 147,760 in Family Medicine Physician, 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
385
Medicare Part D claims · 199 beneficiaries · Family Medicine Physician avg: 3K
What the federal data shows
Christopher Knox, MD filed 385 Medicare Part D claims in 2023 as a Family Medicine Physician in Harrison, Arkansas.
- 385
- Part D claims, 2023
- Likely
- board-certified (heuristic)
- ≥57th
- 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 1871583229 · Family Medicine Physician
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1871583229
- ENUM-LEGACY 2005
- TAX-MEGA 148K Family Medicine
- RX-LIGHT 385
- BOOK-LIGHT 1,541 in Arkansas
- PHOTO-ENUM David Freeman · 2005
Christopher Knox, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
385 ≥ 57th percentile 57% 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
✓
Board certification likely (heuristic, not verified)
Christopher Knox, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 1 hospital affiliation - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Christopher Knox, MD?
Quality data not reportedPrimary specialty
Family Medicine Physician
Medicare Part D claims
385 89% vs specialty avg
Specialty distribution in Arkansas
How Family Medicine Physician compares to other specialties among Arkansas 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 Family Medicine Physician. 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 | 1871583229 |
|---|---|
| Specialty | Family Medicine Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 10/26/2005 |
Hospital and facility affiliations
Facilities where Christopher Knox, MD 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.
Newgen OF Arkansas LLC
Clarksville, AR
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.
385
Total Claims
$6K
Total Drug Cost
199
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 386
- Total Day Supply
- 2,760
- Generic Drug Cost
- $4K
- Opioid Claims
- 105 (27.3% rate)
- Antibiotic Claims
- 108
Patient Demographics
- Average Patient Age
- 67.0 years
- Avg HCC Risk Score
- 1.80
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 74, 65-74: 67, 75-84: 44, 85+: 14
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Christopher Knox, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Hydrocodone-Acetam…
Hydrocodone-Acetaminophen
77 claims
- Ondansetron Odt
Ondansetron Odt
39 claims
- Prednisone
Prednisone
38 claims
- Nitrofurantoin Mon… 22
Nitrofurantoin Mono-Macro
22 claims
- Tramadol Hcl 22
Tramadol Hcl
22 claims
- Doxycycline Hyclate 18
Doxycycline Hyclate
18 claims
- Promethazine Hcl 17
Promethazine Hcl
17 claims
- Amoxicillin-Clavul… 14
Amoxicillin-Clavulanate Potass
14 claims
| Drug | Claims |
|---|---|
| Hydrocodone-Acetaminophen Hydrocodone/Acetaminophen | 77 |
| Ondansetron Odt Ondansetron | 39 |
| Prednisone | 38 |
| Nitrofurantoin Mono-Macro Nitrofurantoin Monohyd/M-Cryst | 22 |
| Tramadol Hcl | 22 |
| Doxycycline Hyclate | 18 |
| Promethazine Hcl | 17 |
| Amoxicillin-Clavulanate Potass Amoxicillin/Potassium Clav | 14 |
| Levofloxacin | 13 |
| Cephalexin | 11 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Family Medicine Physician Overview
How Christopher Knox, MD fits within the Family Medicine Physician landscape nationally.
147,760
Family Medicine Physician Providers in US
56
States with Family Medicine Physician
3,418
Avg Claims per Provider
Christopher Knox, MD's 385 claims are below the specialty average of 3,418.
Nationwide Family Medicine Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Knox, both outside Arkansas so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2005)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Family Medicine Physician Providers in Arkansas
Other clinicians with the same primary specialty enrolled in Arkansas, drawn from the same CMS NPPES roster as Knox.
One of 1,541 Family Medicine Physician providers enrolled in Arkansas, 5 are shown here.
Dr. Wiley Abbott
MD
Texarkana, AR
Dr. Jamal Abdin
M.D.
Farmington, AR
Dr. Timothy Abels
MD
Batesville, AR
Dr. Bryan Abernathy
M.D
Fayetteville, AR
Dr. Jose Abiseid
M.D.
Clinton, AR
Compare Family Medicine Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Christopher Knox, MD's specialty? ▼
Christopher Knox, MD specializes in Family Medicine Physician and practices in Harrison, Arkansas. Credentials: MD.
How much does Christopher Knox, MD prescribe under Medicare Part D? ▼
In 2023, Christopher Knox, MD wrote 385 Medicare Part D claims totaling $6K in drug costs for 199 beneficiaries.
Where is Christopher Knox, MD located? ▼
Christopher Knox, MD is located at 620 N WILLOW ST, Harrison, AR, 72601. Phone: (870) 365-2076.
What is Christopher Knox, MD's NPI number? ▼
Christopher Knox, MD's National Provider Identifier (NPI) is 1871583229, issued on 10/26/2005.
Does Christopher Knox, MD prescribe opioids? ▼
Yes, Christopher Knox, MD had 105 opioid claims in 2023 with an opioid prescribing rate of 27.3%.
How many Family Medicine Physician providers are there in the US? ▼
There are 147,760 Family Medicine Physician providers across 56 states in the US. The average Family Medicine Physician provider writes 3,418 Medicare Part D claims per year.
What drugs does Christopher Knox, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Christopher Knox, MD's most frequently prescribed drugs include Hydrocodone-Acetaminophen, Ondansetron Odt, Prednisone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Christopher Knox, MD accept Medicare? ▼
Christopher Knox, MD appears in CMS Medicare data with 385 Part D claims and 199 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Christopher Knox, MD's credentials? ▼
Christopher Knox, MD's NPI is 1871583229 with credentials MD. 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.