Dr. William L. Simpson Jr., MD
- Medicare services, 2018
- 1,216
- Part D claims, 2024
- 1,013
- Hospital affiliations
- 1
- Industry payments
- $483
- State license
- 1
- Practice address
- 15225 Healthcote Boulevard, Haymarket, VA 20169
- Practice phone
- Call (571) 284-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Simpson's professional email, personal email and mobile number
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Dr. William L. Simpson Jr. is an internist in Haymarket, Virginia
Dr. Simpson practices at UVA Health Haymarket Medical Center in Haymarket, Virginia, part of University of Virginia.
Dr. Simpson's NPI, 1124092309, was assigned on February 15, 2006. Dr. Simpson graduated from University of Virginia School of Medicine in 1990. Dr. Simpson holds Virginia license 0101048951.
- NPI
- 1124092309NPI Registry (opens in a new tab)
- NPI enumeration date
- February 15, 2006
- NPI status
- Active
- Practice phone
- (571) 284-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. William L. Simpson Jr. practices at UVA Health Haymarket Medical Center in Haymarket, Virginia
Dr. Simpson's primary practice is UVA Health Haymarket Medical Center, at 15225 Healthcote Boulevard, Haymarket, VA 20169 in Prince William County. The practice phone is (571) 284-1000.
- UVA Health Haymarket Medical Center15225 Healthcote Boulevard, Haymarket, VA 20169 · Prince William CountyPhone(571) 284-1000
Source: Dmand AI Affiliation Data
Dr. William L. Simpson Jr. is affiliated with 1 site of care
Dr. Simpson's primary practice is UVA Health Haymarket Medical Center in Haymarket, Virginia, part of University of Virginia.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William L. Simpson Jr.'s practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Simpson practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UVA Health Haymarket Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William L. Simpson Jr. is one of 3,339 internists in Virginia
Internal medicine is Dr. Simpson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Simpson is licensed in Virginia.
Specialties and state licenses
- Internal medicine, VirginiaPrimary
Internists near Dr. Simpson
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. William L. Simpson Jr. billed Medicare for 1,216 services in 2018
CMS data shows 1,216 Medicare services from Dr. Simpson across 12 procedure codes in 2018. Medicare paid $36,552 for them. Every service was in an office.
Dr. Simpson's Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 1,5742018: 52966%
- Surgery
- 2017: 7962018: 28364%
- Other services
- 2017: 7602018: 19474%
- Tests and treatments
- 2017: 7482018: 17976%
- Lab and pathology
- 2017: 1192018: 3174%
- Drugs given in the office
- 2017: 752018: 0100%
Dr. Simpson compared with the Virginia median for internists, 2018
- Dr. Simpson
- Virginia median
- Medicare services
- 1,216vs 6072.0 times
- Part D claims
- 685vs 2243.1 times
Medians across 3,182 internists in Virginia with Dmand AI profiles that report each measure.
Dr. Simpson's 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. Simpson?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Simpson and other internists in Virginia.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William L. Simpson Jr.'s patients have a median age of 68
Across all payers, Dmand AI patient panel data puts Dr. Simpson's median patient age at 68, with 42% women.
Dr. Simpson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women42%
- Men56%
Source: Dmand AI Patient Panel Data
Dr. William L. Simpson Jr. wrote 1,013 Medicare Part D claims in 2024
In 2024, Dr. Simpson wrote 1,013 Medicare Part D claims for 76 patients. 86% of them were for generic drugs. CMS names the drug for 685 of them, across 36 drugs with 11 or more claims each, at $98,600 in total drug cost. In 2023, CMS named 492 claims across 24 drugs.
Dr. Simpson's Part D claims by kind of drug, 2024
- Generic874 claims86%
- Brand-name and other139 claims14%
Dr. Simpson'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. Simpson's Part D claims, 2024
- Opioids2%24 of 1,013 claims
- Antibiotics6%59 of 1,013 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: 4922024: 68539%
Drugs named by CMS: 36 in 2024, 24 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. William L. Simpson Jr. received $483 in industry payments from 2016 to 2022
CMS Open Payments shows 36 general payments to Dr. Simpson from 9 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 99% of the total. Janssen Pharmaceuticals, Inc paid the most, $283.
General payments to Dr. Simpson by program year, 2016 to 2022
General payments to Dr. Simpson by kind, 2016 to 2022
- Food and beverage$47999%
- Education$51%
Companies that paid Dr. Simpson the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William L. Simpson Jr. graduated from University of Virginia School of Medicine
Dr. Simpson graduated from University of Virginia School of Medicine in 1990.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William L. Simpson Jr.'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)Medicare Part D Prescribers - by Provider (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. William L. Simpson Jr.
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 L. Simpson Jr.'s NPI number?
Dr. William L. Simpson Jr.'s NPI number is 1124092309. It was assigned on February 15, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William L. Simpson Jr.?
Dr. William L. Simpson Jr. is an internist in Haymarket, Virginia. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. William L. Simpson Jr. practice?
Dr. Simpson practices at 15225 Healthcote Boulevard, Haymarket, VA 20169. Dr. Simpson's primary practice is UVA Health Haymarket Medical Center in Haymarket, Virginia, part of University of Virginia.
What is Dr. William L. Simpson Jr.'s office phone number?
The practice phone on file for Dr. Simpson is (571) 284-1000.
What is Dr. William L. Simpson Jr.'s medical license number?
Dr. Simpson holds Virginia license 0101048951.
Which hospitals is Dr. William L. Simpson Jr. affiliated with?
Dr. Simpson practices at UVA Health Haymarket Medical Center in Haymarket, Virginia.
Does Dr. William L. Simpson Jr. accept Medicare?
Yes. CMS data shows Dr. Simpson billed Medicare for 1,216 services in 2018.
What services does Dr. William L. Simpson Jr. bill to Medicare?
In 2018, Dr. Simpson's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and office visit, established patient (99213).
Where did Dr. William L. Simpson Jr. go to medical school?
Dr. Simpson graduated from University of Virginia School of Medicine in 1990.
What drugs does Dr. William L. Simpson Jr. prescribe most?
In 2024 Medicare Part D data, Dr. Simpson's most prescribed drugs by claims were Levothyroxine Sodium, Sertraline HCl and Lisinopril.
Has Dr. William L. Simpson Jr. received payments from drug or device companies?
CMS Open Payments shows $483 in general payments to Dr. Simpson from 9 companies from 2016 to 2022. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. William L. Simpson Jr. been practicing?
Dr. Simpson graduated from medical school in 1990, 36 years ago.
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