NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1376530568 DO
Verify on CMS → Mark Brower, DO
Ophthalmology Physician in Elkhorn, 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 22,082 in Ophthalmology 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
1K
Medicare Part D claims · 282 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
76%
generic claims · 24% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
70.6/100
▼ 12 pts below national avg 83.1 · Mid-tier
Industry payments
$54.24
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
Mark Brower, DO reported a CMS MIPS final score of 70.6/100 - below the 83.1 national average - and filed 1,038 Medicare Part D claims in 2023.
- 70.6/100
- MIPS score · -12 vs avg
- 1K
- Part D claims, 2023
- 76%
- 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.
Mark Brower, DO's MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
71 8th percentile higher than 8% 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 Mark Brower, DO sits
This provider among ophthalmology physician peers
Across the 9,866 ophthalmology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Mark Brower, DO writes more Part D claims than 46% of them and scores higher on MIPS quality than 9% - placing this provider in the lower-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 ophthalmology physician peer from a representative sample of 60; the gold marker is Mark Brower, DO. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Mark Brower, DO practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 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 Mark Brower, DO?
Below national averagePrimary specialty
Ophthalmology Physician
Medicare Part D claims
1,038 27% vs specialty avg
MIPS final score
70.6/100 12.5 pts vs avg
Specialty distribution in Wisconsin
How Ophthalmology Physician compares to other specialties among Wisconsin providers
Medicare quality performance, MIPS
Mark Brower, DO's 2023 MIPS final score plotted against the Ophthalmology Physician national average
- MIPS Final Score
- 70.6/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Ophthalmology Physician) - 70.6/100 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).
Mark Brower, DO appears in the CMS NPPES registry as an Ophthalmology Physician provider holding DO credentials at 1311 S LINCOLN ST, Elkhorn, WI, 53121, with a listed phone of (262) 723-4600. NPI 1376530568 was issued on 10/03/2005.
Medicare Part D records for calendar year 2023 show 1,038 prescription claims written by this provider, covering 282 Medicare beneficiaries and totaling roughly $67K in drug spend, split 24% brand-name and 76% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 70.6/100 for the 2023 performance year (Quality 67.9, Cost 34.9), compared with the national average of 83.1.
Ophthalmology Physician is a mid-sized specialty nationwide, with 22,082 enrolled providers across 56 states and an average of 1,420 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 | 1376530568 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | DO |
| Gender | Male |
| NPI Issued | 10/03/2005 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
70.6028
Final Score
Avg: 83.1
67.9307
Quality
34.912
Cost
99
Promoting Interoperability
Reporting: Individual
Hospital and facility affiliations
Facilities where Mark Brower, DO 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.
Eye Physicians And Surgeons SC
Elkhorn, 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 Mark Brower, DO. Source: openpaymentsdata.cms.gov.
Total received
$54
Largest payer
Oyster Point Pharma, Inc.
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
Mark Brower, DO - brand share 24.0%
Ophthalmology Physician average
24% brand-name claims vs 76% generic, on 1,038 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.
1,038
Total Claims
$67K
Total Drug Cost
282
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,898
- Total Day Supply
- 53,164
- Brand vs Generic
- 24% brand / 76% generic
- Brand Drug Cost
- $40K
- Generic Drug Cost
- $27K
Patient Demographics
- Average Patient Age
- 78.4 years
- Avg HCC Risk Score
- 1.14
- Gender Split
- 58% female / 42% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Mark Brower, DO prescribes most
Top Medicare Part D drugs by claim count, 2023
- Latanoprost
Latanoprost
387 claims
- Timolol Maleate
Timolol Maleate
175 claims
- Erythromycin 78
Erythromycin
78 claims
- Brimonidine Tartrate 48
Brimonidine Tartrate
48 claims
- Ciprofloxacin Hcl 48
Ciprofloxacin Hcl
48 claims
- Dorzolamide-Timolol 43
Dorzolamide-Timolol
43 claims
- Ketorolac Trometha… 35
Ketorolac Tromethamine
35 claims
- Dorzolamide Hcl 32
Dorzolamide Hcl
32 claims
| Drug | Claims |
|---|---|
| Latanoprost | 387 |
| Timolol Maleate | 175 |
| Erythromycin Erythromycin Base | 78 |
| Brimonidine Tartrate | 48 |
| Ciprofloxacin Hcl | 48 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 43 |
| Ketorolac Tromethamine | 35 |
| Dorzolamide Hcl | 32 |
| Lumigan Bimatoprost | 25 |
| Prednisolone Acetate | 25 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Mark Brower, DO fits within the Ophthalmology Physician landscape nationally.
22,082
Ophthalmology Physician Providers in US
56
States with Ophthalmology Physician
1,420
Avg Claims per Provider
Mark Brower, DO's 1,038 claims are below the specialty average of 1,420.
Nearby Ophthalmology Physician Providers in Wisconsin
Other clinicians with the same primary specialty enrolled in Wisconsin, drawn from the same CMS NPPES roster as Brower.
Dr. Nausheen Abbas
M.D.
West Bend, WI
Dr. Omar Abdelmegid
MD
Beaver Dam, WI
Dr. Jacob Abou-Hanna
MD
Madison, WI
Dr. Julia Agapov
DO
Madison, WI
Dr. Swati Agarwal-Sinha
MD
Green Bay, WI
Compare Ophthalmology 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 Ophthalmology 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 Mark Brower, DO's specialty? ▼
Mark Brower, DO specializes in Ophthalmology Physician and practices in Elkhorn, Wisconsin. Credentials: DO.
How much does Mark Brower, DO prescribe under Medicare Part D? ▼
In 2023, Mark Brower, DO wrote 1,038 Medicare Part D claims totaling $67K in drug costs for 282 beneficiaries.
What is Mark Brower, DO's Medicare quality score? ▼
Mark Brower, DO has a CMS MIPS Final Score of 70.6/100 (Quality: 67.9, Cost: 34.9). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Mark Brower, DO located? ▼
Mark Brower, DO is located at 1311 S LINCOLN ST, Elkhorn, WI, 53121. Phone: (262) 723-4600.
What is Mark Brower, DO's NPI number? ▼
Mark Brower, DO's National Provider Identifier (NPI) is 1376530568, issued on 10/03/2005.
Does Mark Brower, DO prescribe more brand-name or generic drugs? ▼
Mark Brower, DO's prescribing is 24% brand-name and 76% generic drugs by claim count, with $40K in brand drug costs.
How many Ophthalmology Physician providers are there in the US? ▼
There are 22,082 Ophthalmology Physician providers across 56 states in the US. The average Ophthalmology Physician provider writes 1,420 Medicare Part D claims per year.
What drugs does Mark Brower, DO prescribe most often? ▼
Based on 2023 Medicare Part D data, Mark Brower, DO's most frequently prescribed drugs include Latanoprost, Timolol Maleate, Erythromycin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Mark Brower, DO accept Medicare? ▼
Mark Brower, DO appears in CMS Medicare data with 1,038 Part D claims and 282 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Mark Brower, DO's credentials? ▼
Mark Brower, DO's NPI is 1376530568 with credentials DO. 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.