Robert Grumbach, M.D.
NPI 1881664795 · Obstetrics & Gynecology Physician · Rock Hill, SC
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Grumbach, M.D. is a Obstetrics & Gynecology Physician provider in Rock Hill, SC (NPI 1881664795).
Provider details
- NPI number
- 1881664795
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 197600 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
645 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 152 | $85 |
| Screening 3d Breast Mammography77063 | 150 | $22 |
| Screening Mammography77067 | 149 | $83 |
| Cervical Or Vaginal Cancer Screening; Pelvic and Clinical Breast ExaminationG0101 | 112 | $36 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 16 | $9 |
| Ultrasound Scan of Uterus, Ovaries, Tubes, Cervix and Pelvic Area Through Vagina76830 | 16 | $109 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Fluconazole | 64 | 32 |
| Valacyclovir Hclbrand: Valacyclovir | 32 | — |
| Clobetasol Propionate | 32 | 20 |
| Estrogens, Conjugatedbrand: Premarin | 31 | — |
| Estradiol | 29 | 12 |
| Terconazole | 29 | 16 |
| Mirabegronbrand: Myrbetriq | 26 | — |
| Paroxetine Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$532 across 29 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 2728 Sunset Blvd Ste 201West Columbia, SC 29169-4837Phone: (803) 254-1300Fax: (803) 771-7597
Registry dates
- Enumerated
- 2006-01-24
- Last updated
- 2025-03-27
- Certified
- 2025-03-27
Frequently asked questions
- What is Robert Grumbach's NPI number?
- Robert Grumbach's National Provider Identifier (NPI) is 1881664795, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Grumbach's specialty?
- Robert Grumbach is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Grumbach located?
- Robert Grumbach's practice location on file with NPPES is 222 Herlong Ave S, Rock Hill, SC 29732-1158.
- What is Robert Grumbach's phone number?
- The practice phone number listed in the NPPES registry for Robert Grumbach is (803) 329-1234.
- Does Robert Grumbach accept Medicare?
- Robert Grumbach is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Grumbach's NPI active?
- Yes — Robert Grumbach's NPI (1881664795) is active in the NPPES registry as of the last update on 2025-03-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.