Robert Paul Grumbach, M.D.
Obstetrics & Gynecology Physician · Rock Hill, SC
Robert Paul Grumbach, M.D. is an obstetrics & gynecology physician with a practice address in Rock Hill, South Carolina, and NPI 1881664795, issued on Jan 24, 2006. Check the license (South Carolina 19760, as entered in NPPES) on the South Carolina Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Robert Paul Grumbach
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- 19760 SC
197600 SC
Self-reported in NPPES; status is on the state search - Practice location
- 222 Herlong Ave S, Rock Hill, SC 29732
- Phone
- (803) 329-1234
- Enumerated
- Jan 24, 2006
- Record last updated
- Mar 27, 2025
- Fax
- (803) 328-1785
- Medicare enrollment
- Enrolled (PECOS I20120306000072); accepts Medicare assignment
- Medical or professional school
- University Of South Carolina School Of Medicine, 1996
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 752 in South Carolina → Look up another NPI →
Also registered at 222 Herlong Ave S
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Brooke BaussPhysician Assistant1366307308
- Marcelin Bhasker, MDInternal Medicine Physician1720408651
- Chandler BlackburnSurgical Physician Assistant1275476202
- Ethan BoykoAnesthesiologist Assistant1508791120
- Madison BramerPhysician Assistant1184418717
Verify Robert Paul Grumbach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersSouth Carolina Board of Medical Examiners
Search for license 19760Check 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 obstetrics & gynecology physician in 2024
580 Medicare Part D claims for 140 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Fluconazole64 claims
- Clobetasol Propionate32 claims
- Valacyclovir32 claims
- Premarin31 claims
- Estradiol29 claims
- Terconazole29 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 practice group's MIPS final score for 2023 (Medicare payment program): 83 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. 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, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $531.72
29 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.
Bills Medicare through one group practice
- Lexington Health IncWest Columbia, SC
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Paul Grumbach among 752 obstetrics & gynecology physician records in South Carolina
Robert Paul Grumbach, 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
- Graduated1996 · median 2006 among the 477 with a school on file
- Record last updated2025 · 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 Rock Hill → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- David Barkley, MDRock Hill, SC 297321659303469
- Jamila Crawford, M.D.Rock Hill, SC 297321295951903
- Susan Demchak, MDRock Hill, SC 297321114958295
- Ted Garcia, MDRock Hill, SC 297321790717437
- Ansley Hilton, MDRock Hill, SC 297321760407753
- James Hubbard, DORock Hill, SC 297321457355497
- Heather Leslie-Brown, M.D.Rock Hill, SC 297321215026570
- Robert McClelland, M.D.Rock Hill, SC 297321669449070
Common questions
What is Robert Paul Grumbach, M.D.'s NPI number?
Robert Paul Grumbach, M.D.'s National Provider Identifier (NPI) is 1881664795, issued on Jan 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Paul Grumbach, M.D. located?
The NPPES record lists a practice address at 222 Herlong Ave S, Rock Hill, SC, 29732. Phone: (803) 329-1234. Providers update this record themselves, so call before visiting.
How can I verify Robert Paul Grumbach, M.D.'s license?
NPPES lists South Carolina license number 19760, 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 Robert Paul Grumbach, M.D. prescribe under Medicare Part D?
In 2024, Robert Paul Grumbach, M.D. had 580 Medicare Part D claims for 140 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
What is Robert Paul Grumbach, M.D.'s MIPS final score?
The 2023 MIPS final score is 83 of 100, reported for the practice group. 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.