DR. WILLIAM ELIJAH CHASTAIN MD
NPI 1891980777
Hospitalist in Greenville, SC
About Dr. William Elijah Chastain Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. WILLIAM ELIJAH CHASTAIN MD (NPI 1891980777) is an individual hospitalist provider in Greenville, South Carolina, licensed in North Carolina (2020-02273) and active in the NPI registry since September 2007. He is enrolled in Medicare PECOS, is affiliated with Ochsner Medical Center Acute, and maintains 5 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 5
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
Dr. William Elijah Chastain Md 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 Reassignments
11Medicare enrollment records show William Chastain reassigns Medicare billing to 11 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Greenville, SC 29605
- Reassigned Medicare billing, South Carolina enrollment
- 3,281 clinicians in this Medicare group
Greer, SC 29650
- Reassigned Medicare billing, South Carolina enrollment
- 754 clinicians in this Medicare group
Greer, SC 29651
- Reassigned Medicare billing, South Carolina enrollment
- 313 clinicians in this Medicare group
Hendersonville, NC 28792
- Reassigned Medicare billing, North Carolina enrollment
- Medicare enrollment name: Novant Health Medical Group, LLC
- 2,998 clinicians in this Medicare group
Gainesville, GA 30501
- Reassigned Medicare billing, Georgia enrollment
- 1,172 clinicians in this Medicare group
Monroe, GA 30655
- Reassigned Medicare billing, North Carolina and South Carolina enrollments
- 511 clinicians in this Medicare group
Macon, GA 31210
- Reassigned Medicare billing, Georgia enrollment
- 635 clinicians in this Medicare group
Myrtle Beach, SC 29572
- Reassigned Medicare billing, South Carolina enrollment
- 529 clinicians in this Medicare group
Terrytown, LA 70056
- Reassigned Medicare billing, Louisiana enrollment
- 417 clinicians in this Medicare group
Biddeford, ME 04005
- Reassigned Medicare billing, Maine enrollment
- 3,140 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 5
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.
Ochsner Medical Center Acute
Acute Care Hospitals · New Orleans, LANovant Health Forsyth Medical Center
Acute Care Hospitals · Winston-Salem, NCNovant Health Brunswick Medical Center
Acute Care Hospitals · Supply, NCSpartanburg Medical Center
Acute Care Hospitals · Spartanburg, SCGrand Strand Regional Medical Center
Acute Care Hospitals · Myrtle Beach, SCPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 29605 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.
Reported Quality Measures
Referred Medical Equipment & Supplies CMS DME claims 2
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 William Chastain's NPI number?
The NPI number for William Chastain is 1891980777. It was assigned to this individual provider in the NPPES registry on September 13, 2007.
Where is William Chastain located?
William Chastain practices at 701 Grove Rd Fl 5, Greenville, SC 29605. The listed phone number is (864) 455-4411.
What is William Chastain's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is William Chastain enrolled in Medicare?
Yes. William Chastain 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 William Chastain's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Chastain reassigns Medicare benefits to 11 organizations: Prisma Health University Medical Group (Greenville, SC), Spartanburg Medical Center (Greer, SC), Pelham Medical Center (Greer, SC), Novant Medical Group, Inc. (Hendersonville, NC), Northeast Georgia Physicians Group Inc (Gainesville, GA) and 6 more organizations, listed in the Medicare section above. 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 William Chastain's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Chastain accept?
Health plans from Cigna Healthcare, HMO Louisiana, Oscar Health Maintenance Organization of Florida, Oscar Health Plan of North Carolina, Inc and Oscar Insurance Company list William Chastain 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 William Chastain affiliated with any hospitals?
According to CMS data, William Chastain is affiliated with Ochsner Medical Center Acute, Novant Health Forsyth Medical Center, Novant Health Brunswick Medical Center, Spartanburg Medical Center and Grand Strand Regional Medical Center.
When was this NPI record last updated?
The NPPES record for William Chastain was last updated on June 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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. William Elijah Chastain, MD · NPI 1891980777
Hospitalist physician in Greenville, South Carolina. Individual provider, active in the CMS NPPES registry since September 13, 2007.
## Identity
- **NPI:** 1891980777 (Entity type: Individual)
- **Enumerated:** September 13, 2007
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 2020-02273 (North Carolina)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 701 GROVE RD FL 5, Greenville, SC 29605-4210
- **Phone:** (864) 455-4411
## 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:** 11 organizations under Medicare reassignment (form CMS-855R): Prisma Health University Medical Group (NPI 1053786483, Greenville, SC); Spartanburg Medical Center (NPI 1467407536, Greer, SC); Pelham Medical Center (NPI 1245496983, Greer, SC); Novant Medical Group, Inc. (NPI 1124892765, Hendersonville, NC); Northeast Georgia Physicians Group Inc (NPI 1891745212, Gainesville, GA); and 6 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2007
## Record status
- **NPPES last updated:** June 30, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1891980777) · Data from the CMS NPPES public registry.