Dr. John William Warner, MD
- Medicare services, 2024
- 3,378
- Medicare patients, 2024
- 758
- Part D claims, 2024
- 2,264
- Hospital affiliations
- 5
- Industry payments
- $2,113
- Practice address
- 1840 Amherst St, Winchester, VA 22601
- Practice phone
- Call (540) 536-8000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Warner's professional email, personal email and mobile number
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Dr. John William Warner is a urologist in Winchester, Virginia
Dr. Warner practices at Winchester Medical Center in Winchester, Virginia, part of Valley Health.
Dr. Warner's NPI, 1881795821, was assigned on September 25, 2006. Dr. Warner graduated from University of North Carolina at Chapel Hill School of Medicine in 1998. Dr. Warner holds Virginia license 0101236167.
- NPI
- 1881795821NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6305823105
- NPI enumeration date
- September 25, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (540) 536-8000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 54
- Medical school graduation
- 1998
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John William Warner practices at Winchester Medical Center in Winchester, Virginia
Dr. Warner's primary practice is Winchester Medical Center, at 1840 Amherst St, Winchester, VA 22601 in Winchester City. The practice phone is (540) 536-8000.
- Winchester Medical Center1840 Amherst St, Winchester, VA 22601 · Winchester CityPhone(540) 536-8000
Source: Dmand AI Affiliation Data
Dr. John William Warner is affiliated with 8 sites of care and 4 medical groups
Dr. Warner's primary practice is Winchester Medical Center in Winchester, Virginia, part of Valley Health. Dr. Warner is also affiliated with Shenandoah Memorial Hospital. The medical group on file is Valley Health Urology. Dmand AI also links Dr. Warner to 3 more hospitals, 3 group practices and clinics and 3 medical groups, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John William Warner's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Warner practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Winchester Medical Center | Available with a free account |
| +7 more sites and 3 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 Valley Health and 6.2K+ hospitals, with verified contacts in the same login.
Dr. John William Warner is one of 326 urologists in Virginia
Urology is Dr. Warner's primary specialty in the NPI Registry, under taxonomy code 208800000X. Dr. Warner is licensed in Virginia.
Specialties and state licenses
- Urology, VirginiaPrimary
Urologists near Dr. Warner
Counts of urologists 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
Dr. John William Warner billed Medicare for 3,378 services in 2024
CMS data shows 3,378 Medicare services from Dr. Warner across 24 procedure codes in 2024, for 758 Medicare patients. Medicare paid $123,687 for them.
Dr. Warner's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 1,4852024: 1,12924%
- Lab and pathology
- 2023: 1,1112024: 1,0377%
- Office and hospital visits
- 2023: 9142024: 8547%
- Surgery
- 2023: 5592024: 27451%
- Imaging
- 2023: 472024: 482%
- Tests and treatments
- 2023: 522024: 3631%
Where Dr. Warner's Medicare services took place, 2024
- In an office3,15994%
- In a facility2196%
Dr. Warner compared with the Virginia median for urologists, 2024
- Dr. Warner
- Virginia median
- Medicare services
- 3,378vs 1,5742.1 times
- Medicare patients
- 758vs 57931% above
- Part D claims
- 2,178vs 6173.5 times
Medians across 313 urologists in Virginia with Dmand AI profiles that report each measure.
Dr. Warner's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Warner?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Warner and other urologists in Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John William Warner treated 758 Medicare patients in 2024, average age 77
CMS counts 758 Medicare patients who saw Dr. Warner in 2024. The largest group is 75 to 84, with 346 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 4% are also on Medicaid. Their average risk score is 1.33, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Warner's median patient age at 73, with 27% women.
Dr. Warner's Medicare patients by age, 2024
Dr. Warner's Medicare patients by sex, 2024
- Women13718%
- Men62182%
Chronic conditions among Dr. Warner's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis46%
- Cancer35%
- Chronic kidney disease34%
- Ischemic heart disease34%
- Diabetes33%
- Atrial fibrillation25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Warner's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women27%
- Men72%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John William Warner wrote 2,264 Medicare Part D claims in 2024
In 2024, Dr. Warner wrote 2,264 Medicare Part D claims for 510 patients. 94% of them were for generic drugs. CMS names the drug for 2,178 of them, across 28 drugs with 11 or more claims each, at $111,410 in total drug cost. In 2023, CMS named 2,105 claims across 27 drugs.
Dr. Warner's Part D claims by kind of drug, 2024
- Generic2,131 claims94%
- Brand-name133 claims6%
Dr. Warner's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Warner's Part D claims, 2024
- Opioids2%39 of 2,264 claims
- Antibiotics18%403 of 2,264 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2,1052024: 2,1783%
Drugs named by CMS: 28 in 2024, 27 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. John William Warner offers telehealth to Medicare patients
Dr. Warner accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Warner as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Prostate resection: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. John William Warner received $2,113 in industry payments from 2016 to 2025
CMS Open Payments shows 107 general payments to Dr. Warner from 28 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Astellas Pharma US Inc paid the most, $384.
General payments to Dr. Warner by program year, 2016 to 2025
General payments to Dr. Warner by kind, 2016 to 2025
- Food and beverage$2,09999%
- Education$151%
Companies that paid Dr. Warner the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John William Warner graduated from University of North Carolina at Chapel Hill School of Medicine
Dr. Warner graduated from University of North Carolina at Chapel Hill School of Medicine in 1998.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John William Warner'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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 and Drug (CMS) (opens in a new tab)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)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 Dr. John William Warner
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. John William Warner's NPI number?
Dr. John William Warner's NPI number is 1881795821. It was assigned on September 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. John William Warner?
Dr. John William Warner is a urologist in Winchester, Virginia. The primary specialty in the NPI Registry is Urology Physician (taxonomy code 208800000X).
Where does Dr. John William Warner practice?
Dr. Warner practices at 1840 Amherst St, Winchester, VA 22601. Dr. Warner's primary practice is Winchester Medical Center in Winchester, Virginia, part of Valley Health. Dmand AI also links Dr. Warner to 3 hospitals, 3 group practices and clinics and 3 medical groups.
What is Dr. John William Warner's office phone number?
The practice phone on file for Dr. Warner is (540) 536-8000.
What is Dr. John William Warner's medical license number?
Dr. Warner holds Virginia license 0101236167.
Which hospitals is Dr. John William Warner affiliated with?
Dr. Warner practices at Winchester Medical Center in Winchester, Virginia. Dr. Warner is also affiliated with Shenandoah Memorial Hospital. Dmand AI links Dr. Warner to 3 more hospitals.
What medical group is Dr. John William Warner part of?
Dr. Warner is linked to Valley Health Urology. Dmand AI links Dr. Warner to 3 more medical groups.
Does Dr. John William Warner accept Medicare?
Yes. CMS data shows Dr. Warner billed Medicare for 3,378 services in 2024, and Dr. Warner accepts Medicare assignment.
Does Dr. John William Warner offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Warner as offering telehealth services.
How many Medicare patients does Dr. John William Warner see?
CMS counts 758 Medicare patients who saw Dr. Warner in 2024, with an average age of 77.
Show 5 more questionsShow fewer questions
What services does Dr. John William Warner bill to Medicare?
In 2024, Dr. Warner's most billed Medicare services were injected or infused drug (J9030), lab and pathology test (81000) and office visit, established patient (99213).
Where did Dr. John William Warner go to medical school?
Dr. Warner graduated from University of North Carolina at Chapel Hill School of Medicine in 1998.
What drugs does Dr. John William Warner prescribe most?
In 2024 Medicare Part D data, Dr. Warner's most prescribed drugs by claims were Tamsulosin HCl, Finasteride and Cephalexin.
Has Dr. John William Warner received payments from drug or device companies?
CMS Open Payments shows $2,113 in general payments to Dr. Warner from 28 companies from 2016 to 2025. The largest total came from Astellas Pharma US Inc.
How long has Dr. John William Warner been practicing?
Dr. Warner graduated from medical school in 1998, 28 years ago.
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