Meningococcal InfectionsMeningitisMeningococcal Groups A, C, W and Y Conjugate Vaccine (MenACWY)MenABCWY-1MenABCWY-2
Dr. William David Byars, MD
NPI1336110147
- Medicare services, 2018
- 1,273
- Part D claims, 2019
- 112
- Clinical trials
- 6
- Industry payments
- $8,032
- Affiliated sites
- 3
- Practice address
- 125 Commonwealth Dr, Greenville, SC 29615
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Saint Francis Hospital Outpatient Surgery Center - HOPD
Acute Care Hospital outpatient department · Greenville, South Carolina
Find Dr. Byars' professional email, personal email and mobile number
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Dr. William David Byars is a family medicine physician in Greenville, South Carolina
Dr. Byars practices at Saint Francis Hospital Outpatient Surgery Center - HOPD in Greenville, South Carolina.
Dr. Byars' NPI, 1336110147, was assigned on January 30, 2006. Dr. Byars holds South Carolina license 9201.
NPI and contact details
- NPI
- 1336110147NPI Registry (opens in a new tab)
- NPI enumeration date
- January 30, 2006
- NPI status
- Active
- 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. William David Byars practices at Saint Francis Hospital Outpatient Surgery Center - HOPD in Greenville, South Carolina
Dr. Byars' primary practice is Saint Francis Hospital Outpatient Surgery Center - HOPD, at 125 Commonwealth Dr, Greenville, SC 29615.
- Saint Francis Hospital Outpatient Surgery Center - HOPD125 Commonwealth Dr, Greenville, SC 29615
Source: Dmand AI Affiliation Data
Dr. William David Byars is affiliated with 3 sites of care and 3 medical groups
Dr. Byars' primary practice is Saint Francis Hospital Outpatient Surgery Center - HOPD in Greenville, South Carolina. The medical group on file is Prisma Health Medical Group. Dmand AI also links Dr. Byars to 2 more group practices and clinics and 2 medical groups, each named with a free account.
Saint Francis Hospital Outpatient Surgery Center - HOPDPrimary
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. William David Byars' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Byars practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Saint Francis Hospital Outpatient Surgery Center - HOPD | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William David Byars is one of 2,356 family medicine physicians in South Carolina
Family medicine is Dr. Byars' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Byars is licensed in South Carolina.
Specialties and state licenses
- Family medicine, South CarolinaPrimary
Family medicine physicians near Dr. Byars
Counts of family medicine physicians 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 David Byars billed Medicare for 1,273 services in 2018
CMS data shows 1,273 Medicare services from Dr. Byars across 14 procedure codes in 2018. Medicare paid $42,388 for them. Every service was in an office.
Medicare services, 20181,273
Paid by Medicare$42,388
Procedure codes14
Dr. Byars' Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 1,0232018: 54247%
- Surgery
- 2017: 5272018: 35233%
- Other services
- 2017: 3552018: 12964%
- Lab and pathology
- 2017: 2482018: 12450%
- Tests and treatments
- 2017: 2242018: 5775%
- Drugs given in the office
- 2017: 1682018: 4474%
- Imaging
- 2017: 462018: 2546%
Dr. Byars compared with the South Carolina median for family medicine physicians, 2018
- Dr. Byars
- South Carolina median
- Medicare services
- 1,273vs 74471% above
- Part D claims
- 112vs 1,02389% below
Medians across 2,295 family medicine physicians in South Carolina with Dmand AI profiles that report each measure.
Dr. Byars' 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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Byars and other family medicine physicians in South Carolina.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William David Byars' patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Dr. Byars' median patient age at 73, with 20% women.
Dr. Byars' 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
- Women20%
- Men80%
Source: Dmand AI Patient Panel Data
Dr. William David Byars wrote 112 Medicare Part D claims in 2019
In 2019, Dr. Byars wrote 112 Medicare Part D claims. They cover 8 drugs, with $2,013 in total drug cost. In 2018, CMS named 7,444 claims across 147 drugs.
Part D claims, 2019112
Drugs named by CMS8
Total drug cost$2,013
Dr. Byars' 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: 7,4442019: 11298%
Drugs named by CMS: 8 in 2019, 147 in 2018.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. William David Byars has worked on 6 clinical trials
Dmand AI links Dr. Byars to 6 clinical trials, 3 of them phase 3 studies. Conditions studied include Migraine Disorders, Headache and Meningococcal Infections. Eli Lilly and Company sponsors the most, 4. Open Payments lists research payments to Dr. Byars that name 3 trials.
Conditions in Dr. Byars' trials
- Migraine Disorders
- Headache
- Meningococcal Infections
- Migraine without Aura
- Prediabetic State
Investigators on the most trials with Dr. Byars
- Harold Edward Bays, MD3 shared trials
- Michael Joseph Downing, MD3 shared trials
- Gregg H. Lucksinger, MD3 shared trials
Recent clinical trials with Dr. Byars
A Randomized, Double-Blind, Parallel Group, Placebo-Controlled Study to Assess STS101 in the Acute Treatment of Migraine (opens in a new tab)
CompletedPhase 3
Migraine without AuraMigraine with AuraDihydroergotamine
Lasmiditan 100 mgLasmiditan 200 mgLasmiditan 50 mg
A Study of Tirzepatide (LY3298176) in Participants With Obesity or Overweight (opens in a new tab)
Completed
$1,408 in research paymentsPrediabetic StateObesityTirzepatide
$806 in research paymentsHeadacheMigraine DisordersGalcanezumab
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage
Dr. William David Byars received $8,032 in industry payments from 2016 to 2023
CMS Open Payments shows 177 general payments to Dr. Byars from 24 drug and device companies from 2016 to 2023. Travel and lodging make up the largest share, 54% of the total. Novo Nordisk AS paid the most, $4,629. It also lists 22 research payments totaling $5,813 from 2016 to 2023, naming 3 clinical trials.
General payments to Dr. Byars by program year, 2016 to 2023
General payments to Dr. Byars by kind, 2016 to 2023
$8Kin total
- Travel and lodging$4,36154%
- Food and beverage$3,63145%
- Speaker and faculty fees$330%
- Education$70%
Companies that paid Dr. Byars 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. William David Byars'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 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) |
| Clinical trials and co-investigators | ClinicalTrials.gov (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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 David Byars
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 David Byars' NPI number?
Dr. William David Byars' NPI number is 1336110147. It was assigned on January 30, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. William David Byars?
Dr. William David Byars is a family medicine physician in Greenville, South Carolina. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. William David Byars practice?
Dr. Byars practices at 125 Commonwealth Dr, Greenville, SC 29615. Dr. Byars' primary practice is Saint Francis Hospital Outpatient Surgery Center - HOPD in Greenville, South Carolina. Dmand AI also links Dr. Byars to 2 group practices and clinics and 2 medical groups.
What is Dr. William David Byars' medical license number?
Dr. Byars holds South Carolina license 9201.
What medical group is Dr. William David Byars part of?
Dr. Byars is linked to Prisma Health Medical Group. Dmand AI links Dr. Byars to 2 more medical groups.
Does Dr. William David Byars accept Medicare?
Yes. CMS data shows Dr. Byars billed Medicare for 1,273 services in 2018.
What services does Dr. William David Byars bill to Medicare?
In 2018, Dr. Byars' most billed Medicare services were surgery: heart and blood vessels (36415), office visit, established patient (99214) and office visit, established patient (99213).
What drugs does Dr. William David Byars prescribe most?
In 2019 Medicare Part D data, Dr. Byars' most prescribed drugs by claims were Atorvastatin Calcium, Montelukast Sodium and Levothyroxine Sodium.
Has Dr. William David Byars received payments from drug or device companies?
CMS Open Payments shows $8,032 in general payments to Dr. Byars from 24 companies from 2016 to 2023. The largest total came from Novo Nordisk AS.
How long has Dr. William David Byars been practicing?
Dr. Byars' NPI was assigned in 2006.
Does Dr. William David Byars do research?
Dr. Byars has worked on 6 clinical trials.
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