DR. WALTER KASTLER GRANT III M.D.
NPI 1710092077
Pediatrics in Biloxi, MS
About Dr. Walter Kastler Grant Iii M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WALTER KASTLER GRANT III M.D. (NPI 1710092077) is an individual pediatrics provider in Biloxi, Mississippi, licensed in Mississippi (14991) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in Gulfport.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 1
Other Identifiers 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 (PECOS)
Dr. Walter Kastler Grant Iii M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Walter Grant reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Jackson, MS 39216
- Reassigned Medicare billing, Mississippi enrollment
- 1,932 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 39532 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES
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 Walter Grant's NPI number?
The NPI number for Walter Grant is 1710092077. It was assigned to this individual provider in the NPPES registry on August 20, 2006. The provider is also known as Dr. Walter Grant M.D..
Where is Walter Grant located?
Walter Grant practices at 920 Tommy Munro Dr, Biloxi, MS 39532. The listed phone number is (228) 396-8101.
What is Walter Grant's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Walter Grant enrolled in Medicare?
Yes. Walter Grant is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Walter Grant's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Walter Grant reassigns Medicare benefits to State Of Mississippi - University Of Mississippi Medical Center (Jackson, MS). 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 Walter Grant's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Walter Grant accept?
Health plans from Ambetter Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter of Alabama and Ambetter of Tennessee and 2 other insurers list Walter Grant 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.
When was this NPI record last updated?
The NPPES record for Walter Grant was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 days 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.
# Dr. Walter Kastler Grant III, M.D. · NPI 1710092077
Pediatrics physician in Biloxi, Mississippi. Individual provider, active in the CMS NPPES registry since August 20, 2006.
## Identity
- **NPI:** 1710092077 (Entity type: Individual)
- **Enumerated:** August 20, 2006
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 14991 (Mississippi)
- **Sole proprietor:** No
## Practice location
- **Address:** 920 TOMMY MUNRO DR, Biloxi, MS 39532-2150
- **Phone:** (228) 396-8101 · **Fax:** (601) 496-8101
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** State Of Mississippi - University Of Mississippi Medical Center (NPI 1154317527, Jackson, MS), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 29, 2026
- **Other identifiers:** Medicaid 00116939 (MS)
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Source: [NPI Profile](https://npiprofile.com/npi/1710092077) · Data from the CMS NPPES public registry.