Grantham Warren, M.D.
NPI 1073583241 · Obstetrics & Gynecology Physician · Spartanburg, SC
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Grantham Warren, M.D. is a Obstetrics & Gynecology Physician provider in Spartanburg, SC (NPI 1073583241).
Provider details
- NPI number
- 1073583241
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 26613 (SC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
102 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 80 | $121 |
| Screening Papanicolaou Smear; Obtaining, Preparing and Conveyance of Cervical Or Vaginal Smear to LaboratoryQ0091 | 22 | $42 |
Typical Medicare-allowed amounts for these services range $42–$121 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Estradiol | 85 | 28 |
| Estrogens, Conjugatedbrand: Premarin | 47 | — |
| Medroxyprogesterone Acetate | 30 | — |
| Fluconazole | 21 | 11 |
| Valacyclovir Hclbrand: Valacyclovir | 13 | — |
| Venlafaxine Hclbrand: Venlafaxine Hcl Er | 13 | — |
| Diazepam | 12 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$292 across 12 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
Registry dates
- Enumerated
- 2006-01-23
- Last updated
- 2021-01-14
- Certified
- 2021-01-14
Frequently asked questions
- What is Grantham Warren's NPI number?
- Grantham Warren's National Provider Identifier (NPI) is 1073583241, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Grantham Warren's specialty?
- Grantham Warren is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Grantham Warren located?
- Grantham Warren's practice location on file with NPPES is 853 N Church St, Spartanburg, SC 29303-3098.
- What is Grantham Warren's phone number?
- The practice phone number listed in the NPPES registry for Grantham Warren is (864) 583-4556.
- Does Grantham Warren accept Medicare?
- Grantham Warren is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Grantham Warren's NPI active?
- Yes — Grantham Warren's NPI (1073583241) is active in the NPPES registry as of the last update on 2021-01-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.