John E. Warren, OD
- Medicare patients, 2024
- 314
- Part D claims, 2024
- 244
- MIPS score, 2024
- 79
- Hospital affiliations
- 1
- Industry payments
- $1,729
- Practice address
- 10400 75th St, Kenosha, WI 53142
- Practice phone
- Call (262) 948-5600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find John Warren's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
John E. Warren is an optometrist in Kenosha, Wisconsin
John Warren practices at Aurora Medical Center - Kenosha in Kenosha, Wisconsin, part of Advocate Health.
John Warren's NPI, 1609868124, was assigned on August 19, 2005. John Warren graduated from Indiana University - School of Optometry in 1992. John Warren holds Wisconsin license 2527.
- NPI
- 1609868124NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5193897999
- NPI enumeration date
- August 19, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (262) 948-5600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 60
- Medical school graduation
- 1992
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
John E. Warren practices at Aurora Medical Center - Kenosha in Kenosha, Wisconsin
John Warren's primary practice is Aurora Medical Center - Kenosha, at 10400 75th St, Kenosha, WI 53142 in Kenosha County. The practice phone is (262) 948-5600.
- Aurora Medical Center - Kenosha10400 75th St, Kenosha, WI 53142 · Kenosha CountyPhone(262) 948-5600
Source: Dmand AI Affiliation Data
John E. Warren is affiliated with 4 sites of care and 2 medical groups
John Warren's primary practice is Aurora Medical Center - Kenosha in Kenosha, Wisconsin, part of Advocate Health. Dmand AI also links John Warren to 2 group practices and clinics, 2 medical groups and 1 therapy and rehab clinic, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at John E. Warren's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Warren practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Aurora Medical Center - Kenosha | Available with a free account |
| +3 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Advocate Health and 6.2K+ hospitals, with verified contacts in the same login.
John E. Warren is one of 946 optometrists in Wisconsin
Optometrist is John Warren's primary specialty in the NPI Registry, under taxonomy code 152W00000X. John Warren is licensed in Wisconsin.
Specialties and state licenses
- Optometrist, WisconsinPrimary
Optometrists near John Warren
Counts of optometrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
John E. Warren treated 314 Medicare patients in 2024, average age 74
CMS counts 314 Medicare patients who saw John Warren in 2024. The largest group is 65 to 74, with 152 patients. 74% of them have high cholesterol, and 72% have high blood pressure. 11% are also on Medicaid. Their average risk score is 0.90, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts John Warren's median patient age at 72, with 55% women.
John Warren's Medicare patients by age, 2024
John Warren's Medicare patients by sex, 2024
- Women18158%
- Men13342%
Chronic conditions among John Warren's Medicare patients, 2024
- High cholesterol74%
- High blood pressure72%
- Arthritis36%
- Chronic kidney disease21%
- Diabetes21%
- Cancer18%
- Ischemic heart disease18%
- Anxiety16%
Share of Medicare patients with each condition. A patient can have several.
John Warren's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
John E. Warren wrote 244 Medicare Part D claims in 2024
In 2024, John Warren wrote 244 Medicare Part D claims for 73 patients. 69% of them were for generic drugs.
John Warren's Part D claims by kind of drug, 2024
- Generic168 claims69%
- Brand-name76 claims31%
Drug classes CMS tracks in John Warren's Part D claims, 2024
- Antibiotics5%12 of 244 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
John E. Warren scored 79 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 79 out of 100 for John Warren for performance year 2024, reported individually. John Warren accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
John Warren's MIPS scores, performance year 2024
- 79of 100Final score
- 57.5of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
John E. Warren received $1,729 in industry payments in 2025
CMS Open Payments shows 2 general payments to John Warren from 2 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Lumenis BE inc paid the most, $1,607.
Companies that paid John Warren the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
John E. Warren graduated from Indiana University - School of Optometry
John Warren graduated from Indiana University - School of Optometry in 1992.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for John E. Warren's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about John E. Warren
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John E. Warren's NPI number?
John E. Warren's NPI number is 1609868124. It was assigned on August 19, 2005, and it is active in the NPI Registry.
What does John E. Warren specialize in?
John E. Warren is an optometrist in Kenosha, Wisconsin. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does John E. Warren practice?
John Warren practices at 10400 75th St, Kenosha, WI 53142. John Warren's primary practice is Aurora Medical Center - Kenosha in Kenosha, Wisconsin, part of Advocate Health. Dmand AI also links John Warren to 2 group practices and clinics, 2 medical groups and 1 therapy and rehab clinic.
What is John E. Warren's office phone number?
The practice phone on file for John Warren is (262) 948-5600.
What is John E. Warren's medical license number?
John Warren holds Wisconsin license 2527.
Which hospitals is John E. Warren affiliated with?
John Warren practices at Aurora Medical Center - Kenosha in Kenosha, Wisconsin.
Does John E. Warren accept Medicare?
Yes. CMS lists John Warren as accepting Medicare assignment.
What is John E. Warren's MIPS score?
John Warren's MIPS final score for performance year 2024 is 79 out of 100, reported individually.
How many Medicare patients does John E. Warren see?
CMS counts 314 Medicare patients who saw John Warren in 2024, with an average age of 74.
Where did John E. Warren go to medical school?
John Warren graduated from Indiana University - School of Optometry in 1992.
Has John E. Warren received payments from drug or device companies?
CMS Open Payments shows $1,729 in general payments to John Warren from 2 companies from 2025 to 2025. The largest total came from Lumenis BE inc.
How long has John E. Warren been practicing?
John Warren graduated from medical school in 1992, 34 years ago.
Selling to optometrist practices?
See optometrists in Wisconsin by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card