NPI registry status
Active
2026 NPPES data Surgery Physician NPI 1841637634 M.D.
Verify on CMS → Christopher Johnson, M.D.
Surgery Physician in Menomonie, 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 36,199 in Surgery 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
90
Medicare Part D claims · 53 beneficiaries · Surgery Physician avg: 169
Generic prescribing
80%
generic claims · 20% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$41.3
2 payments · CMS Open Payments (Sunshine Act)
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
Christopher Johnson, M.D. filed 90 Medicare Part D claims in 2023 as a Surgery Physician in Menomonie, Wisconsin, prescribing 80% generic.
- 90
- Part D claims, 2023
- 80%
- generic prescribing
- Likely
- board-certified (heuristic)
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.
Christopher Johnson, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
90 0th percentile higher than 0% 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
✓
Board certification likely (heuristic, not verified)
Christopher Johnson, M.D. 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 Johnson, M.D.?
Quality data not reportedPrimary specialty
Surgery Physician
Medicare Part D claims
90 47% vs specialty avg
Specialty distribution in Wisconsin
How Surgery Physician compares to other specialties among Wisconsin 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 Surgery 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).
Christopher Johnson, M.D. appears in the CMS NPPES registry as a Surgery Physician provider holding M.D. credentials at 2321 STOUT RD, Menomonie, WI, 54751, with a listed phone of (715) 235-5531. NPI 1841637634 was issued on 06/03/2013.
Medicare Part D records for calendar year 2023 show 90 prescription claims written by this provider, covering 53 Medicare beneficiaries and totaling roughly $3K in drug spend, split 20% brand-name and 80% generic by claim count, with an opioid prescribing rate of 16.7%.
Surgery Physician is a mid-sized specialty nationwide, with 36,199 enrolled providers across 56 states and an average of 169 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 | 1841637634 |
|---|---|
| Specialty | Surgery Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 06/03/2013 |
Hospital and facility affiliations
Facilities where Christopher Johnson, M.D. 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.
Mayo Clinic Health System-Northwest Wisconsin Region Inc
Eau Claire, 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).
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Christopher Johnson, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$41
Largest payer
Abbott Laboratories
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
Brand vs generic prescribing mix · Typical
Christopher Johnson, M.D. - brand share 20.0%
Surgery Physician average
20% brand-name claims vs 80% generic, on 90 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.
90
Total Claims
$3K
Total Drug Cost
53
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 90
- Total Day Supply
- 325
- Brand vs Generic
- 20% brand / 80% generic
- Brand Drug Cost
- $1K
- Generic Drug Cost
- $2K
- Opioid Claims
- 15 (16.7% rate)
- Antibiotic Claims
- 29
Patient Demographics
- Average Patient Age
- 70.5 years
- Avg HCC Risk Score
- 1.50
- Gender Split
- 55% female / 45% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Christopher Johnson, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Oxycodone Hcl
Oxycodone Hcl
14 claims
- Ciprofloxacin Hcl
Ciprofloxacin Hcl
12 claims
- Metronidazole
Metronidazole
12 claims
| Drug | Claims |
|---|---|
| Oxycodone Hcl | 14 |
| Ciprofloxacin Hcl | 12 |
| Metronidazole | 12 |
| Sod Sulf-Potass Sulf-Mag Sulf "Sodium | N/A |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Surgery Physician Overview
How Christopher Johnson, M.D. fits within the Surgery Physician landscape nationally.
36,199
Surgery Physician Providers in US
56
States with Surgery Physician
169
Avg Claims per Provider
Christopher Johnson, M.D.'s 90 claims are below the specialty average of 169.
Nearby Surgery Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Johnson.
Michael Aaberg
Madison, WI
Dr. Benjamin Abadeer
DO
Appleton, WI
Dr. Warren Abell
DO
Osceola, WI
Dr. Alexandra Acher
M.D.
Madison, WI
Dr. Marina Affi Koprowski
M.D.
Milwaukee, WI
Compare Surgery Physician 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 Surgery Physician 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 Christopher Johnson, M.D.'s specialty? ▼
Christopher Johnson, M.D. specializes in Surgery Physician and practices in Menomonie, Wisconsin. Credentials: M.D..
How much does Christopher Johnson, M.D. prescribe under Medicare Part D? ▼
In 2023, Christopher Johnson, M.D. wrote 90 Medicare Part D claims totaling $3K in drug costs for 53 beneficiaries.
Where is Christopher Johnson, M.D. located? ▼
Christopher Johnson, M.D. is located at 2321 STOUT RD, Menomonie, WI, 54751. Phone: (715) 235-5531.
What is Christopher Johnson, M.D.'s NPI number? ▼
Christopher Johnson, M.D.'s National Provider Identifier (NPI) is 1841637634, issued on 06/03/2013.
Does Christopher Johnson, M.D. prescribe more brand-name or generic drugs? ▼
Christopher Johnson, M.D.'s prescribing is 20% brand-name and 80% generic drugs by claim count, with $1K in brand drug costs.
Does Christopher Johnson, M.D. prescribe opioids? ▼
Yes, Christopher Johnson, M.D. had 15 opioid claims in 2023 with an opioid prescribing rate of 16.7%.
How many Surgery Physician providers are there in the US? ▼
There are 36,199 Surgery Physician providers across 56 states in the US. The average Surgery Physician provider writes 169 Medicare Part D claims per year.
What drugs does Christopher Johnson, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Christopher Johnson, M.D.'s most frequently prescribed drugs include Oxycodone Hcl, Ciprofloxacin Hcl, Metronidazole. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Christopher Johnson, M.D. accept Medicare? ▼
Christopher Johnson, M.D. appears in CMS Medicare data with 90 Part D claims and 53 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Christopher Johnson, M.D.'s credentials? ▼
Christopher Johnson, M.D.'s NPI is 1841637634 with credentials M.D.. 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.