Dr. William Kellar Winkelmeyer, MD
- Medicare services, 2024
- 2,243
- Medicare patients, 2024
- 630
- Part D claims, 2024
- 7,458
- Hospital affiliations
- 5
- Industry payments
- $455
- Practice address
- 1205 W Broadway, Columbia, MO 65203
- Practice phone
- Call (573) 499-0642
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Nephrology and Hypertension Associates
Columbia, Missouri
Find Dr. Winkelmeyer'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.
Dr. William Kellar Winkelmeyer is a nephrologist in Columbia, Missouri
Dr. Winkelmeyer practices at Nephrology and Hypertension Associates in Columbia, Missouri.
Dr. Winkelmeyer's NPI, 1316943475, was assigned on June 23, 2005. Dr. Winkelmeyer holds Missouri license 36326.
- NPI
- 1316943475NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3678567229
- NPI enumeration date
- June 23, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (573) 499-0642
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 71
- Medical school graduation
- 1981
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Kellar Winkelmeyer practices at Nephrology and Hypertension Associates in Columbia, Missouri
Dr. Winkelmeyer's primary practice is Nephrology and Hypertension Associates, at 1205 W Broadway, Columbia, MO 65203 in Boone County. The practice phone is (573) 499-0642.
- Nephrology and Hypertension Associates1205 W Broadway, Columbia, MO 65203 · Boone CountyPhone(573) 499-0642
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William Kellar Winkelmeyer is affiliated with 12 sites of care and 1 medical group
Dr. Winkelmeyer's primary practice is Nephrology and Hypertension Associates in Columbia, Missouri. Dr. Winkelmeyer is also affiliated with University Hospital. The medical group on file is Nephrology & Hypertension Associates. Dmand AI also links Dr. Winkelmeyer to 4 more hospitals, 5 dialysis centers and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. William Kellar Winkelmeyer's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Winkelmeyer practices, 11 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Nephrology and Hypertension Associates | Available with a free account |
| +11 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Kellar Winkelmeyer is one of 249 nephrologists in Missouri
Nephrology is Dr. Winkelmeyer's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Winkelmeyer is licensed in Missouri.
Specialties and state licenses
- Nephrology, MissouriPrimary
Nephrologists near Dr. Winkelmeyer
Counts of nephrologists 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. William Kellar Winkelmeyer billed Medicare for 2,243 services in 2024
CMS data shows 2,243 Medicare services from Dr. Winkelmeyer across 12 procedure codes in 2024, for 630 Medicare patients. Medicare paid $189,066 for them.
Dr. Winkelmeyer's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,1872024: 1,32612%
- Other services
- 2023: 02024: 532
- Tests and treatments
- 2023: 5032024: 38523%
Where Dr. Winkelmeyer's Medicare services took place, 2024
- In an office1,54669%
- In a facility69731%
Dr. Winkelmeyer compared with the Missouri median for nephrologists, 2024
- Dr. Winkelmeyer
- Missouri median
- Medicare services
- 2,243vs 8572.6 times
- Medicare patients
- 630vs 2712.3 times
- Part D claims
- 6,970vs 7798.9 times
Medians across 240 nephrologists in Missouri with Dmand AI profiles that report each measure.
Dr. Winkelmeyer'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. Winkelmeyer?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Winkelmeyer and other nephrologists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Kellar Winkelmeyer treated 630 Medicare patients in 2024, average age 75
CMS counts 630 Medicare patients who saw Dr. Winkelmeyer in 2024. The largest group is 75 to 84, with 232 patients. 75% of them have chronic kidney disease, and 75% have high blood pressure. 13% are also on Medicaid. Their average risk score is 2.81, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Winkelmeyer's median patient age at 75, with 48% women.
Dr. Winkelmeyer's Medicare patients by age, 2024
Dr. Winkelmeyer's Medicare patients by sex, 2024
- Women30248%
- Men32852%
Chronic conditions among Dr. Winkelmeyer's Medicare patients, 2024
- Chronic kidney disease75%
- High blood pressure75%
- High cholesterol75%
- Diabetes58%
- Arthritis48%
- Ischemic heart disease43%
- Heart failure42%
- Atrial fibrillation33%
Share of Medicare patients with each condition. A patient can have several.
Dr. Winkelmeyer's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women48%
- Men52%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Kellar Winkelmeyer wrote 7,458 Medicare Part D claims in 2024
In 2024, Dr. Winkelmeyer wrote 7,458 Medicare Part D claims for 620 patients. 93% of them were for generic drugs. CMS names the drug for 6,970 of them, across 100 drugs with 11 or more claims each, at $308,723 in total drug cost. In 2023, CMS named 6,844 claims across 102 drugs.
Dr. Winkelmeyer's Part D claims by kind of drug, 2024
- Generic6,946 claims93%
- Brand-name471 claims6%
- Other41 claims1%
Dr. Winkelmeyer'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. Winkelmeyer's Part D claims, 2024
- Opioids2%117 of 7,458 claims
- Antibiotics1%82 of 7,458 claims
- Antipsychotics, patients 65 and over0%21 of 7,458 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: 6,8442024: 6,9702%
Drugs named by CMS: 100 in 2024, 102 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
How Dr. William Kellar Winkelmeyer takes part in Medicare
Dr. Winkelmeyer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. William Kellar Winkelmeyer received $455 in industry payments from 2016 to 2025
CMS Open Payments shows 19 general payments to Dr. Winkelmeyer from 12 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Bayer HealthCare Pharmaceuticals Inc. paid the most, $123.
General payments to Dr. Winkelmeyer by program year, 2016 to 2025
Companies that paid Dr. Winkelmeyer the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. William Kellar Winkelmeyer'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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. William Kellar Winkelmeyer
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. William Kellar Winkelmeyer's NPI number?
Dr. William Kellar Winkelmeyer's NPI number is 1316943475. It was assigned on June 23, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. William Kellar Winkelmeyer?
Dr. William Kellar Winkelmeyer is a nephrologist in Columbia, Missouri. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. William Kellar Winkelmeyer practice?
Dr. Winkelmeyer practices at 1205 W Broadway, Columbia, MO 65203. Dr. Winkelmeyer's primary practice is Nephrology and Hypertension Associates in Columbia, Missouri. Dmand AI also links Dr. Winkelmeyer to 4 hospitals, 5 dialysis centers and 1 group practice or clinic.
What is Dr. William Kellar Winkelmeyer's office phone number?
The practice phone on file for Dr. Winkelmeyer is (573) 499-0642.
What is Dr. William Kellar Winkelmeyer's medical license number?
Dr. Winkelmeyer holds Missouri license 36326.
Which hospitals is Dr. William Kellar Winkelmeyer affiliated with?
Dr. Winkelmeyer is affiliated with University Hospital. Dmand AI links Dr. Winkelmeyer to 4 more hospitals.
What medical group is Dr. William Kellar Winkelmeyer part of?
Dr. Winkelmeyer is linked to Nephrology & Hypertension Associates.
Does Dr. William Kellar Winkelmeyer accept Medicare?
Yes. CMS data shows Dr. Winkelmeyer billed Medicare for 2,243 services in 2024, and Dr. Winkelmeyer accepts Medicare assignment.
How many Medicare patients does Dr. William Kellar Winkelmeyer see?
CMS counts 630 Medicare patients who saw Dr. Winkelmeyer in 2024, with an average age of 75.
What services does Dr. William Kellar Winkelmeyer bill to Medicare?
In 2024, Dr. Winkelmeyer's most billed Medicare services were medicare service (G2211), office visit, established patient (99215) and hospital inpatient care (99232).
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What drugs does Dr. William Kellar Winkelmeyer prescribe most?
In 2024 Medicare Part D data, Dr. Winkelmeyer's most prescribed drugs by claims were Torsemide, Amlodipine Besylate and Losartan Potassium.
Has Dr. William Kellar Winkelmeyer received payments from drug or device companies?
CMS Open Payments shows $455 in general payments to Dr. Winkelmeyer from 12 companies from 2016 to 2025. The largest total came from Bayer HealthCare Pharmaceuticals Inc.
How long has Dr. William Kellar Winkelmeyer been practicing?
Dr. Winkelmeyer graduated from medical school in 1981, 45 years ago.
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