NPI registry status
Active
2026 NPPES data Ophthalmology Physician NPI 1558421958 MD., PH.D.
Verify on CMS → Stephen Kaufman, MD., PH.D.
Ophthalmology Physician in Milwaukee, 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
541
Medicare Part D claims · 126 beneficiaries · Ophthalmology Physician avg: 1K
Generic prescribing
59%
generic claims · 41% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
82.3/100
▼ 1 pts below national avg 83.1 · Above neutral
Industry payments
$536.67
11 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
Stephen Kaufman, MD., PH.D. reported a CMS MIPS final score of 82.3/100 - below the 83.1 national average - and filed 541 Medicare Part D claims in 2023.
- 82.3/100
- MIPS score · -1 vs avg
- 541
- Part D claims, 2023
- 59%
- 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.
Stephen Kaufman, MD., PH.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
82 39th percentile higher than 39% 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 Stephen Kaufman, MD., PH.D. 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, Stephen Kaufman, MD., PH.D. writes more Part D claims than 27% of them and scores higher on MIPS quality than 40% - 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 Stephen Kaufman, MD., PH.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Stephen Kaufman, MD., PH.D. 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 Stephen Kaufman, MD., PH.D.?
Near national averagePrimary specialty
Ophthalmology Physician
Medicare Part D claims
541 62% vs specialty avg
MIPS final score
82.3/100 0.8 pts vs avg
Specialty distribution in Wisconsin
How Ophthalmology Physician compares to other specialties among Wisconsin providers
Medicare quality performance, MIPS
Stephen Kaufman, MD., PH.D.'s 2023 MIPS final score plotted against the Ophthalmology Physician national average
- MIPS Final Score
- 82.3/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Ophthalmology Physician) - 82.3/100 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).
Stephen Kaufman, MD., PH.D. appears in the CMS NPPES registry as an Ophthalmology Physician provider holding MD., PH.D. credentials at 925 N 87TH ST, Milwaukee, WI, 53226, with a listed phone of (414) 456-2020. NPI 1558421958 was issued on 12/08/2006.
Medicare Part D records for calendar year 2023 show 541 prescription claims written by this provider, covering 126 Medicare beneficiaries and totaling roughly $75K in drug spend, split 41% brand-name and 59% generic by claim count. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 82.3/100 for the 2023 performance year (Quality 81.5, Cost 38.2), 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 | 1558421958 |
|---|---|
| Specialty | Ophthalmology Physician |
| Credentials | MD., PH.D. |
| Gender | Male |
| NPI Issued | 12/08/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
82.3405
Final Score
Avg: 83.1
81.5407
Quality
38.1722
Cost
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Stephen Kaufman, MD., PH.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.
Shepherd Eye Center Ltd
Las Vegas, NV
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 Stephen Kaufman, MD., PH.D.. Source: openpaymentsdata.cms.gov.
Total received
$537
Largest payer
Glaukos Corporation
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 · Above average
Stephen Kaufman, MD., PH.D. - brand share 41.0%
Ophthalmology Physician average
41% brand-name claims vs 59% generic, on 541 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.
541
Total Claims
$75K
Total Drug Cost
126
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 917
- Total Day Supply
- 24,915
- Brand vs Generic
- 41% brand / 59% generic
- Brand Drug Cost
- $60K
- Generic Drug Cost
- $15K
- Antibiotic Claims
- 20
Patient Demographics
- Average Patient Age
- 73.1 years
- Avg HCC Risk Score
- 1.54
- Gender Split
- 58% female / 42% male
- Age Distribution
- <65: 16, 65-74: 50, 75-84: 45, 85+: 15
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Stephen Kaufman, MD., PH.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Prednisolone Acetate
Prednisolone Acetate
108 claims
- Erythromycin
Erythromycin
84 claims
- Valacyclovir
Valacyclovir
47 claims
- Ofloxacin 42
Ofloxacin
42 claims
- Cyclosporine 30
Cyclosporine
30 claims
- Fluorometholone 29
Fluorometholone
29 claims
- Restasis 24
Restasis
24 claims
- Dorzolamide Hcl 16
Dorzolamide Hcl
16 claims
| Drug | Claims |
|---|---|
| Prednisolone Acetate | 108 |
| Erythromycin Erythromycin Base | 84 |
| Valacyclovir Valacyclovir Hcl | 47 |
| Ofloxacin | 42 |
| Cyclosporine | 30 |
| Fluorometholone | 29 |
| Restasis Cyclosporine | 24 |
| Dorzolamide Hcl | 16 |
| Acyclovir | 15 |
| Dorzolamide-Timolol Dorzolamide Hcl/Timolol Maleat | 15 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Ophthalmology Physician Overview
How Stephen Kaufman, MD., PH.D. 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
Stephen Kaufman, MD., PH.D.'s 541 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 Kaufman.
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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore Wisconsin
Frequently Asked Questions
What is Stephen Kaufman, MD., PH.D.'s specialty? ▼
Stephen Kaufman, MD., PH.D. specializes in Ophthalmology Physician and practices in Milwaukee, Wisconsin. Credentials: MD., PH.D..
How much does Stephen Kaufman, MD., PH.D. prescribe under Medicare Part D? ▼
In 2023, Stephen Kaufman, MD., PH.D. wrote 541 Medicare Part D claims totaling $75K in drug costs for 126 beneficiaries.
What is Stephen Kaufman, MD., PH.D.'s Medicare quality score? ▼
Stephen Kaufman, MD., PH.D. has a CMS MIPS Final Score of 82.3/100 (Quality: 81.5, Cost: 38.2). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Stephen Kaufman, MD., PH.D. located? ▼
Stephen Kaufman, MD., PH.D. is located at 925 N 87TH ST, Milwaukee, WI, 53226. Phone: (414) 456-2020.
What is Stephen Kaufman, MD., PH.D.'s NPI number? ▼
Stephen Kaufman, MD., PH.D.'s National Provider Identifier (NPI) is 1558421958, issued on 12/08/2006.
Does Stephen Kaufman, MD., PH.D. prescribe more brand-name or generic drugs? ▼
Stephen Kaufman, MD., PH.D.'s prescribing is 41% brand-name and 59% generic drugs by claim count, with $60K 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 Stephen Kaufman, MD., PH.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Stephen Kaufman, MD., PH.D.'s most frequently prescribed drugs include Prednisolone Acetate, Erythromycin, Valacyclovir. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Stephen Kaufman, MD., PH.D. accept Medicare? ▼
Stephen Kaufman, MD., PH.D. appears in CMS Medicare data with 541 Part D claims and 126 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Stephen Kaufman, MD., PH.D.'s credentials? ▼
Stephen Kaufman, MD., PH.D.'s NPI is 1558421958 with credentials MD., PH.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.
- 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.