Dr. William Reece McWilliams, MD
- Medicare services, 2024
- 853
- Medicare patients, 2024
- 421
- Part D claims, 2024
- 401
- Hospital affiliations
- 3
- Medical groups
- 2
- Practice address
- 5 Medical Park, Columbia, SC 29203
- Practice phone
- Call (803) 296-2548
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. McWilliams' professional email, personal email and mobile number
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Dr. William Reece McWilliams is an internist in Columbia, South Carolina
Dr. McWilliams practices at Prisma Health Richland Hospital in Columbia, South Carolina, part of Prisma Health.
Dr. McWilliams' NPI, 1346535127, was assigned on June 9, 2011. Dr. McWilliams graduated from University of South Carolina School of Medicine in 2011. Dr. McWilliams holds South Carolina license LL33545.
- NPI
- 1346535127NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3274753348
- NPI enumeration date
- June 9, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (803) 296-2548
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Reece McWilliams practices at Prisma Health Richland Hospital in Columbia, South Carolina
Dr. McWilliams' primary practice is Prisma Health Richland Hospital, at 5 Medical Park, Columbia, SC 29203 in Richland County. The practice phone is (803) 296-2548.
- Prisma Health Richland Hospital5 Medical Park, Columbia, SC 29203 · Richland CountyPhone(803) 296-2548
Source: Dmand AI Affiliation Data
Dr. William Reece McWilliams is affiliated with 8 sites of care and 2 medical groups
Dr. McWilliams' primary practice is Prisma Health Richland Hospital in Columbia, South Carolina, part of Prisma Health. Dr. McWilliams is also affiliated with Prisma Health Baptist Hospital. The medical group on file is Prisma Health Medical Group-Midlands. Dmand AI also links Dr. McWilliams to 1 more hospital, 2 group practices and clinics, 2 home health agencies, 1 hospice and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Reece McWilliams' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. McWilliams practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Prisma Health Richland Hospital | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Reece McWilliams is one of 1,707 internists in South Carolina
Internal medicine is Dr. McWilliams' primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. McWilliams is licensed in South Carolina.
Specialties and state licenses
- Internal medicine, South CarolinaPrimary
Internists near Dr. McWilliams
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 Reece McWilliams billed Medicare for 853 services in 2024
CMS data shows 853 Medicare services from Dr. McWilliams across 6 procedure codes in 2024, for 421 Medicare patients. Medicare paid $68,167 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. McWilliams' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7142024: 85319%
Dr. McWilliams compared with the South Carolina median for internists, 2024
- Dr. McWilliams
- South Carolina median
- Medicare services
- 853vs 74015% above
- Medicare patients
- 421vs 25863% above
- Part D claims
- 103vs 33169% below
Medians across 1,708 internists in South Carolina with Dmand AI profiles that report each measure.
Dr. McWilliams' 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.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Reece McWilliams treated 421 Medicare patients in 2024, average age 76
CMS counts 421 Medicare patients who saw Dr. McWilliams in 2024. The largest group is 75 to 84, with 169 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 20% are also on Medicaid. Their average risk score is 2.64, 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. McWilliams' median patient age at 64, with 55% women.
Dr. McWilliams' Medicare patients by age, 2024
Dr. McWilliams' Medicare patients by sex, 2024
- Women22152%
- Men20048%
Chronic conditions among Dr. McWilliams' Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis56%
- Chronic kidney disease54%
- Diabetes53%
- Heart failure51%
- Ischemic heart disease49%
- Anxiety43%
Share of Medicare patients with each condition. A patient can have several.
Dr. McWilliams' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women55%
- Men45%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Reece McWilliams wrote 401 Medicare Part D claims in 2024
In 2024, Dr. McWilliams wrote 401 Medicare Part D claims for 149 patients. 83% of them were for generic drugs. CMS names the drug for 103 of them, across 6 drugs with 11 or more claims each, at $518 in total drug cost. In 2023, CMS named 26 claims across 2 drugs.
Dr. McWilliams' Part D claims by kind of drug, 2024
- Generic333 claims83%
- Brand-name55 claims14%
- Other13 claims3%
Dr. McWilliams' 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. McWilliams' Part D claims, 2024
- Opioids6%23 of 401 claims
- Antibiotics8%33 of 401 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: 262024: 103296%
Drugs named by CMS: 6 in 2024, 2 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 Reece McWilliams takes part in Medicare
Dr. McWilliams 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 Reece McWilliams graduated from University of South Carolina School of Medicine
Dr. McWilliams graduated from University of South Carolina School of Medicine in 2011.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Reece McWilliams'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 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) |
| 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 Reece McWilliams
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 Reece McWilliams' NPI number?
Dr. William Reece McWilliams' NPI number is 1346535127. It was assigned on June 9, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. William Reece McWilliams?
Dr. William Reece McWilliams is an internist in Columbia, South Carolina. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. William Reece McWilliams practice?
Dr. McWilliams practices at 5 Medical Park, Columbia, SC 29203. Dr. McWilliams' primary practice is Prisma Health Richland Hospital in Columbia, South Carolina, part of Prisma Health. Dmand AI also links Dr. McWilliams to 1 hospital, 2 group practices and clinics, 2 home health agencies, 1 hospice and 1 medical group.
What is Dr. William Reece McWilliams' office phone number?
The practice phone on file for Dr. McWilliams is (803) 296-2548.
What is Dr. William Reece McWilliams' medical license number?
Dr. McWilliams holds South Carolina license LL33545.
Which hospitals is Dr. William Reece McWilliams affiliated with?
Dr. McWilliams practices at Prisma Health Richland Hospital in Columbia, South Carolina. Dr. McWilliams is also affiliated with Prisma Health Baptist Hospital. Dmand AI links Dr. McWilliams to 1 more hospital.
What medical group is Dr. William Reece McWilliams part of?
Dr. McWilliams is linked to Prisma Health Medical Group-Midlands. Dmand AI links Dr. McWilliams to 1 more medical group.
Does Dr. William Reece McWilliams accept Medicare?
Yes. CMS data shows Dr. McWilliams billed Medicare for 853 services in 2024, and Dr. McWilliams accepts Medicare assignment.
How many Medicare patients does Dr. William Reece McWilliams see?
CMS counts 421 Medicare patients who saw Dr. McWilliams in 2024, with an average age of 76.
What services does Dr. William Reece McWilliams bill to Medicare?
In 2024, Dr. McWilliams' most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99239).
Show 3 more questionsShow fewer questions
Where did Dr. William Reece McWilliams go to medical school?
Dr. McWilliams graduated from University of South Carolina School of Medicine in 2011.
What drugs does Dr. William Reece McWilliams prescribe most?
In 2024 Medicare Part D data, Dr. McWilliams' most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Prednisone.
How long has Dr. William Reece McWilliams been practicing?
Dr. McWilliams graduated from medical school in 2011, 15 years ago.
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