Dr. John Patrick Williams, MD
- Medicare services, 2018
- 190
- Part D claims, 2019
- 11
- Hospital affiliations
- 1
- Industry payments
- $974
- State licenses
- 2
- Practice address
- 9300 Dewitt Loop, Fort Belvoir, VA 22060
- Practice phone
- Call (571) 231-3224
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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. John Patrick Williams is an internist in Fort Belvoir, Virginia
Dr. Williams practices at Alexander T. Augusta Military Medical Center in Fort Belvoir, Virginia, part of United States Department of War.
Dr. Williams' NPI, 1154588820, was assigned on May 20, 2008. Dr. Williams holds Georgia license 66374.
- NPI
- 1154588820NPI Registry (opens in a new tab)
- NPI enumeration date
- May 20, 2008
- NPI status
- Active
- Practice phone
- (571) 231-3224
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. John Patrick Williams practices at Alexander T. Augusta Military Medical Center in Fort Belvoir, Virginia
Dr. Williams' primary practice is Alexander T. Augusta Military Medical Center, at 9300 Dewitt Loop, Fort Belvoir, VA 22060 in Fairfax County. The practice phone is (571) 231-3224.
- Alexander T. Augusta Military Medical Center9300 Dewitt Loop, Fort Belvoir, VA 22060 · Fairfax CountyPhone(571) 231-3224
Source: Dmand AI Affiliation Data
Dr. John Patrick Williams is affiliated with 1 site of care
Dr. Williams' primary practice is Alexander T. Augusta Military Medical Center in Fort Belvoir, Virginia, part of United States Department of War. Dr. Williams' employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. John Patrick Williams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Williams practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Alexander T. Augusta Military Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. John Patrick Williams is one of 3,339 internists in Virginia
Internal medicine is Dr. Williams' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Williams' licenses on file in 2 states: Georgia and Indiana.
Specialties and state licenses
- Internal medicine, GeorgiaPrimary
- Student in an organized health care education/training program, Indiana
Internists near Dr. Williams
Counts of internists 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 Patrick Williams billed Medicare for 190 services in 2018
CMS data shows 190 Medicare services from Dr. Williams across 6 procedure codes in 2018. Medicare paid $7,335 for them. Every service was in an office.
Dr. Williams' Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 2202018: 13837%
- Lab and pathology
- 2017: 692018: 2465%
- Other services
- 2017: 762018: 1679%
- Tests and treatments
- 2017: 572018: 1279%
- Imaging
- 2017: 252018: 0100%
- Surgery
- 2017: 342018: 0100%
Dr. Williams compared with the Virginia median for internists, 2018
- Dr. Williams
- Virginia median
- Medicare services
- 190vs 60769% below
- Part D claims
- 11vs 22495% below
Medians across 3,182 internists in Virginia with Dmand AI profiles that report each measure.
Dr. Williams' most billed Medicare procedure codes, 2018
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 internists in Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Patrick Williams' patients have a median age of 67
Across all payers, Dmand AI patient panel data puts Dr. Williams' median patient age at 67, with 51% 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 67
Patient panel by sex, all payers
- Women51%
- Men48%
Source: Dmand AI Patient Panel Data
Dr. John Patrick Williams wrote 11 Medicare Part D claims in 2019
In 2019, Dr. Williams wrote 11 Medicare Part D claims. Every claim was for a generic drug. They cover 1 drug, with $72 in total drug cost. In 2018, CMS named 1,896 claims across 58 drugs.
Dr. Williams' most prescribed drugs by claims, 2019
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, 2018 to 2019
- 2018
- 2019
- Claims for drugs CMS names
- 2018: 1,8962019: 1199%
Drugs named by CMS: 1 in 2019, 58 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. John Patrick Williams received $974 in industry payments from 2016 to 2023
CMS Open Payments shows 55 general payments to Dr. Williams from 17 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. Novo Nordisk Inc paid the most, $234.
General payments to Dr. Williams by program year, 2016 to 2023
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. John Patrick 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 | 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 Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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. John Patrick 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. John Patrick Williams' NPI number?
Dr. John Patrick Williams' NPI number is 1154588820. It was assigned on May 20, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. John Patrick Williams?
Dr. John Patrick Williams is an internist in Fort Belvoir, Virginia. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. John Patrick Williams practice?
Dr. Williams practices at 9300 Dewitt Loop, Fort Belvoir, VA 22060. Dr. Williams' primary practice is Alexander T. Augusta Military Medical Center in Fort Belvoir, Virginia, part of United States Department of War.
What is Dr. John Patrick Williams' office phone number?
The practice phone on file for Dr. Williams is (571) 231-3224.
What is Dr. John Patrick Williams' medical license number?
Dr. Williams holds Georgia license 66374, one of the licenses on file in 2 states.
Which states has Dr. John Patrick Williams been licensed in?
Dmand AI has state licenses on file for Dr. Williams in Georgia and Indiana.
Which hospitals is Dr. John Patrick Williams affiliated with?
Dr. Williams practices at Alexander T. Augusta Military Medical Center in Fort Belvoir, Virginia.
Does Dr. John Patrick Williams accept Medicare?
Yes. CMS data shows Dr. Williams billed Medicare for 190 services in 2018.
What services does Dr. John Patrick Williams bill to Medicare?
In 2018, Dr. Williams' most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and care management and other visits (99490).
What drugs does Dr. John Patrick Williams prescribe most?
In 2019 Medicare Part D data, Dr. Williams' most prescribed drugs by claims were Amlodipine Besylate.
Has Dr. John Patrick Williams received payments from drug or device companies?
CMS Open Payments shows $974 in general payments to Dr. Williams from 17 companies from 2016 to 2023. The largest total came from Novo Nordisk Inc.
How long has Dr. John Patrick Williams been practicing?
Dr. Williams' NPI was assigned in 2008.
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