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DR. GRANTHAM DEWITT WARREN M.D.
NPI 1073583241
Obstetrics & Gynecology in Spartanburg, SC

Active since January 23, 2006PECOS EnrolledAccepts Medicare Assignment
96.08/100
CMS Quality Rating
853 N CHURCH ST, SUITE 600, SPARTANBURG, SC 29303(864) 583-4556(864) 560-0625 Get Directions Write a Review

NPPES record last updated: January 14, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jan 14, 2021, Jan 15, 2018 (2 updates tracked since 2018).

About Dr. Grantham Dewitt Warren M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GRANTHAM DEWITT WARREN M.D. (NPI 1073583241) is an individual obstetrics & gynecology provider in Spartanburg, South Carolina, licensed in South Carolina (26613) and active in the NPI registry since January 2006. He is enrolled in Medicare PECOS, is affiliated with Spartanburg Medical Center, and is a graduate of Brody School Of Medicine At East Carolina University (2000).

NPPES Registry Identity

NPI1073583241
Entity TypeIndividualMale
Primary Taxonomy207V00000X
Provider Legal NameDR. GRANTHAM DEWITT WARRENCredential: M.D.
Location Address853 N CHURCH ST, SUITE 600Spartanburg, SC 29303-3098
Mailing AddressPo Box 743070Atlanta, GA 30374-3070 · (864) 560-4304 · Fax (864) 560-4413
Phone(864) 583-4556
Fax(864) 560-0625
Sole ProprietorNo
Medical School CMSBrody School Of Medicine At East Carolina UniversityGraduated 2000
Enumeration DateJanuary 23, 2006
Last NPPES UpdateJanuary 14, 20212 updates tracked since enumeration
NPPES CertifiedJanuary 14, 2021
✔ NPI 1073583241 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians
Taxonomy Code207V00000X
License✔ Licensed in SC · 26613
Definition
An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.
853 N CHURCH ST, Spartanburg, SC 29303
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Other Identifiers 4

Other195791SC · Medcost
Other7981583SC · Aetna
Medicaid89067EENC
Medicaid266198SC

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Absolute Total Care, Ambetter Health, Ambetter of North Carolina and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Grantham Dewitt Warren M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1456243302
PECOS Enrollment IDI20040326000302
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

4

Medicare enrollment records show Grantham Warren reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Spartanburg Medical Center
Same address
Family Medicine
853 N CHURCH ST, SUITE 701
Spartanburg, SC 29303
NPI 1972513679 (864) 560-1650
Union Medical Center
21 mi
Obstetrics & Gynecology
1201 FURMAN L FENDLEY HWY STE C
Union, SC 29379
  • Reassigned Medicare billing, South Carolina enrollment
  • 66 clinicians in this Medicare group
NPI 1275035255 (864) 427-8380
Obhg South Carolina PC
25 mi
Obstetrics & Gynecology
777 LOWNDES HILL RD BLDG 1
Greenville, SC 29607
  • Reassigned Medicare billing, South Carolina enrollment
  • 190 clinicians in this Medicare group
NPI 1538457361 (800) 967-2289
Mcleod Physician Associates II
126 mi
Urgent Care
964 LOCHEND DR
Darlington, SC 29532
  • Reassigned Medicare billing, South Carolina enrollment
  • 878 clinicians in this Medicare group
NPI 1386819613 (843) 777-6890

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
80 services73 patients
Screening papanicolaou smear; obtaining, preparing and conveyance of cervical or vaginal smear to laboratory Q0091
A Papanicolaou smear, often called a Pap smear, is a test to check for changes in cells. A small sample is gently collected from the lower region and sent to a lab for examination. This helps in early detection of potential health issues.
22 services22 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Spartanburg Medical Center

Acute Care Hospitals · Spartanburg, SC
2/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number420007
Location101 E Wood StSpartanburg, SC 29303 · Spartanburg County
Emergency services Birthing friendly

Cherokee Medical Center

Acute Care Hospitals · Gaffney, SC
2/5 CMS rating
OwnershipGovernment - Hospital District or Authority
CMS Certification Number420043
Location1530 N Limestone StGaffney, SC 29340 · Cherokee County
Emergency services

Union Medical Center

Acute Care Hospitals · Union, SC
OwnershipVoluntary non-profit - Other
CMS Certification Number420108
Location322 West South StreetUnion, SC 29379 · Union County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 29303 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$124.04 typical visit price
range $53.57 – $163.84
Typical copayment $31.01 (range $13.39 – $40.96)
Most-billed visit code 99204
Established Patient
$67.12 typical visit price
range $16.96 – $133.52
Typical copayment $16.78 (range $4.24 – $33.38)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

96.08/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality92.17
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MELONY C FOWLER FNP-C
Nurse Practitioner (Family)
853 N CHURCH ST, SUITE 620
SPARTANBURG, SC 29303
Spartanburg County (864) 573-7511
JAMES SPEARMAN MD
Family Medicine
853 N CHURCH ST
SPARTANBURG, SC 29303
Spartanburg County (864) 560-6193
DR. HAYWOOD GORDON FRANCE JR. MD
Internal Medicine (Gastroenterology)
853 N CHURCH ST, SUITE 620
SPARTANBURG, SC 29303
Spartanburg County (864) 560-1674
GAYATRI SARANGDHAR SURWADE M.D
Family Medicine
853 N CHURCH ST, SUITE 510
SPARTANBURG, SC 29303
Spartanburg County (864) 560-7001
SPARTANBURG REGIONAL MED CTR
Pediatrics
853 N CHURCH ST, SUITE 401
SPARTANBURG, SC 29303
Spartanburg County (864) 560-6287
CHARLES E. MORROW MD
Surgery (Surgical Critical Care)
853 N CHURCH ST, STE 500
SPARTANBURG, SC 29303
Spartanburg County (864) 560-1576
DR. HOANG N GIEP M.D.
Specialist
853 N CHURCH ST, SUITE 700
SPARTANBURG, SC 29303
Spartanburg County (864) 560-7002
DR. HUGH W BARROW JR. M.D.
Obstetrics & Gynecology
853 N CHURCH ST, SUITE 600
SPARTANBURG, SC 29303
Spartanburg County (864) 583-4556

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Grantham Warren's NPI number?

The NPI number for Grantham Warren is 1073583241. It was assigned to this individual provider in the NPPES registry on January 23, 2006.

Where is Grantham Warren located?

Grantham Warren practices at 853 N Church St Suite 600, Spartanburg, SC 29303. The listed phone number is (864) 583-4556.

What is Grantham Warren's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Grantham Warren enrolled in Medicare?

Yes. Grantham Warren is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Grantham Warren's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Grantham Warren reassigns Medicare benefits to 4 organizations: Spartanburg Medical Center (Spartanburg, SC), Union Medical Center (Union, SC), Obhg South Carolina PC (Greenville, SC) and Mcleod Physician Associates II (Darlington, SC). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Grantham Warren's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Grantham Warren accept?

Health plans from Ambetter Health, Ambetter from Absolute Total Care, Ambetter of North Carolina, BlueCross BlueShield of South Carolina and First Choice Next and 2 other insurers list Grantham Warren as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Grantham Warren affiliated with any hospitals?

According to CMS data, Grantham Warren is affiliated with Spartanburg Medical Center, Cherokee Medical Center and Union Medical Center.

When was this NPI record last updated?

The NPPES record for Grantham Warren was last updated on January 14, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.