THANDIWE C GRAY M.D.
NPI 1194884338
Internal Medicine - Hematology & Oncology in Bismarck, ND
About Thandiwe C Gray M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
THANDIWE C GRAY M.D. (NPI 1194884338) is an individual hematology & oncology provider in Bismarck, North Dakota, licensed in North Dakota (11637) and active in the NPI registry since December 2006. She is enrolled in Medicare PECOS, is affiliated with Chi St Alexius Health, and is a graduate of Other (2004).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Accepted 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
Thandiwe C Gray 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.
Medicare Billing Reassignment
Medicare enrollment records show Thandiwe Gray reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Bismarck, ND 58504
- Reassigned Medicare billing, North Dakota enrollment
- 779 clinicians in this Medicare group
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 4
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.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Chi St Alexius Health
Acute Care Hospitals · Bismarck, NDSanford Medical Center Bismarck
Acute Care Hospitals · Bismarck, NDSakakawea Medical Center - Cah
Critical Access Hospitals · Hazen, NDJacobson Memorial Hospital Care Center
Critical Access Hospitals · Elgin, NDMobridge Regional Hospital - Cah
Critical Access Hospitals · Mobridge, SDPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 58501 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
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.
Referred Medical Equipment & Supplies CMS DME claims 5
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
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 Thandiwe Gray's NPI number?
The NPI number for Thandiwe Gray is 1194884338. It was assigned to this individual provider in the NPPES registry on December 6, 2006. The provider is also known as Thandiwe C Chilumbu.
Where is Thandiwe Gray located?
Thandiwe Gray practices at 300 N 7th St, Bismarck, ND 58501. The listed phone number is (701) 323-6000.
What is Thandiwe Gray's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Hematology & Oncology, with taxonomy code 207RH0003X.
Is Thandiwe Gray enrolled in Medicare?
Yes. Thandiwe Gray 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 organization bills Medicare for Thandiwe Gray's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Thandiwe Gray reassigns Medicare benefits to Sanford Bismarck (Bismarck, ND). The 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 Thandiwe Gray's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Thandiwe Gray accept?
Health plans from Blue Cross Blue Shield of North Dakota, Sanford Health Plan and Security Health Plan list Thandiwe Gray 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 Thandiwe Gray affiliated with any hospitals?
According to CMS data, Thandiwe Gray is affiliated with Chi St Alexius Health, Sanford Medical Center Bismarck, Sakakawea Medical Center - Cah, Jacobson Memorial Hospital Care Center and Mobridge Regional Hospital - Cah.
When was this NPI record last updated?
The NPPES record for Thandiwe Gray was last updated on February 20, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Thandiwe C Gray, M.D. · NPI 1194884338
Hematology & Oncology physician in Bismarck, North Dakota. Individual provider, active in the CMS NPPES registry since December 6, 2006.
## Identity
- **NPI:** 1194884338 (Entity type: Individual)
- **Enumerated:** December 6, 2006
- **Primary specialty:** Internal Medicine - Hematology & Oncology · taxonomy 207RH0003X
- **State license:** 11637 (North Dakota)
- **Sole proprietor:** No
## Practice location
- **Address:** 300 N 7TH ST, Bismarck, ND 58501-4439
- **Phone:** (701) 323-6000 · **Fax:** (701) 323-5918
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Sanford Bismarck (NPI 1811941172, Bismarck, ND), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2004
## Record status
- **NPPES last updated:** February 20, 2024
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Source: [NPI Profile](https://npiprofile.com/npi/1194884338) · Data from the CMS NPPES public registry.