Dr. Mark Williams, MD
- Medicare services, 2023
- 2,193
- Part D claims, 2024
- 329
- Industry payments
- $2,097
- Affiliated sites
- 2
- Medical groups
- 2
- Practice address
- 391 Wallace Rd, Nashville, TN 37211
- Practice phone
- Call (765) 762-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St Vincent Williamsport Hospital
Nashville, Tennessee
Find Dr. Williams' 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. Mark Williams is a nephrologist in Nashville, Tennessee
Dr. Williams practices at St Vincent Williamsport Hospital in Nashville, Tennessee.
Dr. Williams' NPI, 1770558702, was assigned on February 22, 2006. Dr. Williams holds Florida license ME54570.
- NPI
- 1770558702NPI Registry (opens in a new tab)
- NPI enumeration date
- February 22, 2006
- NPI status
- Active
- Practice phone
- (765) 762-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Mark Williams practices at St Vincent Williamsport Hospital in Nashville, Tennessee
Dr. Williams' primary practice is St Vincent Williamsport Hospital, at 391 Wallace Rd, Nashville, TN 37211 in Davidson County. The practice phone is (765) 762-4000.
- St Vincent Williamsport Hospital391 Wallace Rd, Nashville, TN 37211 · Davidson CountyPhone(765) 762-4000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark Williams is affiliated with 3 sites of care and 2 medical groups
Dr. Williams' primary practice is St Vincent Williamsport Hospital in Nashville, Tennessee. The medical group on file is Nephrology Associates of Central Florida. Dmand AI also links Dr. Williams to 2 more group practices and clinics and 1 medical group, 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. Mark Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St Vincent Williamsport Hospital | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Williams is one of 230 nephrologists in Tennessee
Nephrology is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Williams is licensed in Florida.
Specialties and state licenses
- Nephrology, FloridaPrimary
Nephrologists near Dr. Williams
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. Mark Williams billed Medicare for 2,193 services in 2023
CMS data shows 2,193 Medicare services from Dr. Williams across 19 procedure codes in 2023. Medicare paid $136,395 for them.
Dr. Williams' Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 2,1372023: 1,15446%
- Lab and pathology
- 2022: 1,4462023: 61857%
- Tests and treatments
- 2022: 7512023: 29661%
- Surgery
- 2022: 2642023: 12553%
Where Dr. Williams' Medicare services took place, 2023
- In an office1,31060%
- In a facility88340%
Dr. Williams compared with the Tennessee median for nephrologists, 2023
- Dr. Williams
- Tennessee median
- Medicare services
- 2,193vs 1,18785% above
- Part D claims
- 208vs 85376% below
Medians across 228 nephrologists in Tennessee with Dmand AI profiles that report each measure.
Dr. Williams' most billed Medicare procedure codes, 2023
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. Williams?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Williams and other nephrologists in Tennessee.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Williams' patients have a median age of 77
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 77, with 65% women.
Dr. Williams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 77
Patient panel by sex, all payers
- Women65%
- Men35%
Source: Dmand AI Patient Panel Data
Dr. Mark Williams wrote 329 Medicare Part D claims in 2024
In 2024, Dr. Williams wrote 329 Medicare Part D claims for 114 patients. 52% of them were for generic drugs. CMS names the drug for 208 of them, across 7 drugs with 11 or more claims each, at $150,080 in total drug cost. In 2023, CMS named 1,026 claims across 29 drugs.
Dr. Williams' Part D claims by kind of drug, 2024
- Generic172 claims52%
- Brand-name157 claims48%
Dr. Williams' 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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1,0262024: 20880%
Drugs named by CMS: 7 in 2024, 29 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
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Dr. Mark Williams received $2,097 in industry payments from 2016 to 2023
CMS Open Payments shows 70 general payments to Dr. Williams from 18 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 94% of the total. AstraZeneca Pharmaceuticals LP paid the most, $649.
General payments to Dr. Williams by program year, 2016 to 2023
General payments to Dr. Williams by kind, 2016 to 2023
- Food and beverage$1,97794%
- Education$1206%
Companies that paid Dr. Williams the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Mark Williams'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 Data |
| 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) |
| 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. Mark Williams
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. Mark Williams' NPI number?
Dr. Mark Williams' NPI number is 1770558702. It was assigned on February 22, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Williams?
Dr. Mark Williams is a nephrologist in Nashville, Tennessee. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Mark Williams practice?
Dr. Williams practices at 391 Wallace Rd, Nashville, TN 37211. Dr. Williams' primary practice is St Vincent Williamsport Hospital in Nashville, Tennessee. Dmand AI also links Dr. Williams to 2 group practices and clinics and 1 medical group.
What is Dr. Mark Williams' office phone number?
The practice phone on file for Dr. Williams is (765) 762-4000.
What is Dr. Mark Williams' medical license number?
Dr. Williams holds Florida license ME54570.
What medical group is Dr. Mark Williams part of?
Dr. Williams is linked to Nephrology Associates of Central Florida. Dmand AI links Dr. Williams to 1 more medical group.
Does Dr. Mark Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 2,193 services in 2023.
What services does Dr. Mark Williams bill to Medicare?
In 2023, Dr. Williams' most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99233) and dialysis (90935).
What drugs does Dr. Mark Williams prescribe most?
In 2024 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Farxiga, Jardiance and Losartan Potassium.
Has Dr. Mark Williams received payments from drug or device companies?
CMS Open Payments shows $2,097 in general payments to Dr. Williams from 18 companies from 2016 to 2023. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Dr. Mark Williams been practicing?
Dr. Williams graduated from medical school in 1983, 43 years ago.
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