William M. Merritt, MD
Gynecologic Oncology Physician · Columbia, SC
William M. Merritt, MD is a gynecologic oncology physician with a practice address in Columbia, South Carolina, and NPI 1609070143, issued on Jun 11, 2007. Check the license on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- William M. Merritt
- Credential
- MD
- Primary taxonomy
- Gynecologic Oncology Physician 207VX0201X
- License number
- M6290 TX
Self-reported in NPPES; status is on the state search - Practice location
- 166 Stoneridge Dr, Columbia, SC 29210
- Phone
- (803) 461-3000
- Enumerated
- Jun 11, 2007
- Record last updated
- Aug 5, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20090728000841); accepts Medicare assignment
- Medical or professional school
- University Of South Carolina School Of Medicine, 2001
- Entity
- Type 1 · individual
8 nearest gynecologic oncology physician records → All 20 in South Carolina → Look up another NPI →
Also registered at 166 Stoneridge Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mary Ackerman, MDHematology & Oncology Physician1912988536
- William Babcock, MDHematology & Oncology Physician1538140173
- Phillip Baldwin, MDHematology & Oncology Physician1215918545
- Amy Ballou, ACNPAcute Care Nurse Practitioner1467719732
- Kevin Blas, M.D.Radiation Oncology Physician1568725810
- Charles Butler, M.D.Internal Medicine Physician1881725364
Verify William M. Merritt in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical ExaminersCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.5 times the Medicare Part D claims of the average gynecologic oncology physician in 2024
688 Medicare Part D claims for 181 beneficiaries, against an average of 195 among the 1,475 providers of this specialty who prescribed in Part D. Brand-name drugs were 21% of claims. 127 claims were for opioids.
Most prescribed
- Ondansetron Odt77 claims
- Letrozole52 claims
- Tramadol Hcl49 claims
- Eliquis47 claims
- Dexamethasone43 claims
- Rubraca36 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 99.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,648.99
77 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 1,199 providers of this specialty with any payment received $6,387.20 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- South Carolina Oncology Assoc PAColumbia, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William M. Merritt among 20 gynecologic oncology physician records in South Carolina
William M. Merritt, MD is one of 20 gynecologic oncology physician records with a practice address in South Carolina. 90% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 45% newer
- In a Medicare fileYes · 90% of these records are
- In the CMS Doctors and Clinicians fileYes · 90% of these records are
- Graduated2001 · median 2002 among the 18 with a school on file
- Record last updated2009 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207VX0201X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gynecologic Oncology Physician providers in South Carolina
There are 20 gynecologic oncology physician records in South Carolina.
All 20 in South Carolina → Every provider in Columbia → Gynecologic Oncology Physician nationwide →
The 8 gynecologic oncology physician records with the nearest ZIP codes
- Sidney Smith, MDColumbia, SC 292101265414593
- James Williams, MDColumbia, SC 292101528040854
- Mark Miller, DOWest Columbia, SC 291691265572093
- James Hunter, M.D.Spartanburg, SC 293031437116548
- Carlton Schwab, M.D.Spartanburg, SC 293031700014982
- Courtney BaileyCharleston, SC 294071992116834
- Thomas Jennings, MDCharleston, SC 294071316942857
- Ward Katsanis, MDCharleston, SC 294071659377851
Common questions
What is William M. Merritt, MD's NPI number?
William M. Merritt, MD's National Provider Identifier (NPI) is 1609070143, issued on Jun 11, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William M. Merritt, MD located?
The NPPES record lists a practice address at 166 Stoneridge Dr, Columbia, SC, 29210. Phone: (803) 461-3000. Providers update this record themselves, so call before visiting.
How can I verify William M. Merritt, MD's license?
Search the South Carolina Board of Medical Examiners at https://verify.llronline.com/LicLookup/Med/Med.aspx?div=22. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William M. Merritt, MD prescribe under Medicare Part D?
In 2024, William M. Merritt, MD had 688 Medicare Part D claims for 181 beneficiaries; the average among gynecologic oncology physician prescribers was 195. Part D covers Medicare prescriptions only.
What is William M. Merritt, MD's MIPS final score?
The 2023 MIPS final score is 99.3 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.