Grantham Dewitt Warren, M.D.
Obstetrics & Gynecology Physician · Spartanburg, SC
Grantham Dewitt Warren, M.D. is an obstetrics & gynecology physician with a practice address in Spartanburg, South Carolina, and NPI 1073583241, issued on Jan 23, 2006. Check the license (South Carolina 26613, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Grantham Dewitt Warren
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 26613 SC
Self-reported in NPPES; status is on the state search - Practice location
- 853 N Church St, Spartanburg, SC 29303
- Phone
- (864) 583-4556
- Enumerated
- Jan 23, 2006
- Record last updated
- Jan 14, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (864) 560-0625
- Medicaid IDs
- 89067EE NC
266198 SC - Medicare enrollment
- Enrolled (PECOS I20040326000302); accepts Medicare assignment
- Medical or professional school
- Brody School Of Medicine At East Carolina University, 2000
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 752 in South Carolina → Look up another NPI →
Also registered at 853 N Church St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mitchell Allen, MDGastroenterology Physician1861463671
- Mary Barnes, RDRegistered Dietitian1194994178
- Hugh Barrow, M.D.Obstetrics & Gynecology Physician1083684195
- Jennifer Becker, MDRheumatology Physician1912129354
- Bisma Beg, M.D.Family Medicine Physician1710117502
- William Bungarz, M.D.Pediatrics Physician1902862337
Verify Grantham Dewitt Warren in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 26613Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.5 times the Medicare Part D claims of the average obstetrics & gynecology physician in 2024
419 Medicare Part D claims for 98 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims.
Most prescribed
- Estradiol85 claims
- Premarin47 claims
- Medroxyprogesterone Acetate30 claims
- Fluconazole21 claims
- Valacyclovir13 claims
- Venlafaxine Hcl Er13 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): 96.1 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: $292.08
12 payments; by number, the most common kind was food and beverage; the largest payer was Astellas Pharma US Inc. The 21,429 providers of this specialty with any payment received $1,030.61 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.
One hospital affiliation
- Spartanburg Medical CenterSpartanburg, SC · Acute Care Hospitals2 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Grantham Dewitt Warren among 752 obstetrics & gynecology physician records in South Carolina
Grantham Dewitt Warren, M.D. is one of 752 obstetrics & gynecology physician records with a practice address in South Carolina. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 54% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2000 · median 2006 among the 477 with a school on file
- Record last updated2021 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a South Carolina practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in South Carolina
There are 752 obstetrics & gynecology physician records in South Carolina.
All 752 in South Carolina → Every provider in Spartanburg → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Amanda AbrairaSpartanburg, SC 293031710368402
- Jennifer Allen, MDSpartanburg, SC 293031285959064
- Hugh Barrow, M.D.Spartanburg, SC 293031083684195
- Kristine Boyd, M.D.Spartanburg, SC 293031043251291
- Dean Davis, M.D.Spartanburg, SC 293031952371601
- Ashley Fowler, M.D.Spartanburg, SC 293031730388109
- Mary Haddad, M.D.Spartanburg, SC 293031598722290
- Jessica Hemsoth, D.O.Spartanburg, SC 293031902243389
Common questions
What is Grantham Dewitt Warren, M.D.'s NPI number?
Grantham Dewitt Warren, M.D.'s National Provider Identifier (NPI) is 1073583241, issued on Jan 23, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Grantham Dewitt Warren, M.D. located?
The NPPES record lists a practice address at 853 N Church St, Spartanburg, SC, 29303. Phone: (864) 583-4556. Providers update this record themselves, so call before visiting.
How can I verify Grantham Dewitt Warren, M.D.'s license?
NPPES lists South Carolina license number 26613, as entered by the provider. 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 Grantham Dewitt Warren, M.D. prescribe under Medicare Part D?
In 2024, Grantham Dewitt Warren, M.D. had 419 Medicare Part D claims for 98 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Grantham Dewitt Warren, M.D.'s MIPS final score?
The 2023 MIPS final score is 96.1 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.