DR. SANDRA LYNN GREGORY MD
NPI 1376503128
Radiology - Radiation Oncology in Atlanta, GA
About Dr. Sandra Lynn Gregory Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. SANDRA LYNN GREGORY MD (NPI 1376503128) is an individual radiation oncology provider in Atlanta, Georgia, licensed in Georgia (057368) and active in the NPI registry since March 2006. She is enrolled in Medicare PECOS, is affiliated with Piedmont Hospital, and maintains 2 additional practice locations.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Locations 2
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 and accepts Medicare assignment
Dr. Sandra Lynn Gregory 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
7Medicare enrollment records show Sandra Gregory reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Atlanta, GA 30342
- Reassigned Medicare billing, Georgia enrollment
- 783 clinicians in this Medicare group
Marietta, GA 30060
- Reassigned Medicare billing, Georgia enrollment
- 19 clinicians in this Medicare group
Jasper, GA 30143
- Reassigned Medicare billing, Georgia enrollment
- 689 clinicians in this Medicare group
Winchester, IL 62694
- Reassigned Medicare billing, Illinois enrollment
- 252 clinicians in this Medicare group
La Crosse, WI 54601
- Reassigned Medicare billing, Wisconsin enrollment
- 1,003 clinicians in this Medicare group
Rochester, MN 55905
- Reassigned Medicare billing, Wisconsin enrollment
- 64 clinicians in this Medicare group
Osseo, WI 54758
- Reassigned Medicare billing, Wisconsin enrollment
- 1,248 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Piedmont Hospital
Acute Care Hospitals · Atlanta, GANorthside Hospital
Acute Care Hospitals · Atlanta, GAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 30318 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.
Other Providers at the Same Location NPPES 4
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ATLANTA, GA 30318
ATLANTA, GA 30318
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 Sandra Gregory's NPI number?
The NPI number for Sandra Gregory is 1376503128. It was assigned to this individual provider in the NPPES registry on March 24, 2006. The provider is also known as Dr. Sandra Lynn Winer MD.
Where is Sandra Gregory located?
Sandra Gregory practices at 1800 Howell Mill Rd NW Ste Ll10, Atlanta, GA 30318. The listed phone number is (404) 425-7900.
What is Sandra Gregory's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Radiation Oncology, with taxonomy code 2085R0001X.
Is Sandra Gregory enrolled in Medicare?
Yes. Sandra Gregory 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 Sandra Gregory's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Sandra Gregory reassigns Medicare benefits to 7 organizations: North Atlanta Professional Services LLC (Atlanta, GA), American Professional Associates, LLC (Marietta, GA), Piedmont Providers LLC (Jasper, GA), Quincy Physicians & Surgeons Clinic, PLLC (Winchester, IL), Mayo Clinic Health System-Southwest Wisconsin Region, Inc. (La Crosse, WI) and 2 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 Sandra Gregory's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Sandra Gregory accept?
Health plans from Alliant Health Plans, Inc., Ambetter Health, Ambetter Health of Delaware, Ambetter from NH Healthy Families and Ambetter from Sunflower Health Plan and 1 other insurer list Sandra Gregory 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 Sandra Gregory affiliated with any hospitals?
According to CMS data, Sandra Gregory is affiliated with Piedmont Hospital and Northside Hospital.
When was this NPI record last updated?
The NPPES record for Sandra Gregory was last updated on June 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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. Sandra Lynn Gregory, MD · NPI 1376503128
Radiation Oncology physician in Atlanta, Georgia. Individual provider, active in the CMS NPPES registry since March 24, 2006.
## Identity
- **NPI:** 1376503128 (Entity type: Individual)
- **Enumerated:** March 24, 2006
- **Primary specialty:** Radiology - Radiation Oncology · taxonomy 2085R0001X
- **State license:** 057368 (Georgia)
- **Sole proprietor:** No
## Practice location
- **Address:** 1800 HOWELL MILL RD NW STE LL10, Atlanta, GA 30318-2593
- **Phone:** (404) 425-7900
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): North Atlanta Professional Services LLC (NPI 1316959869, Atlanta, GA); American Professional Associates, LLC (NPI 1427453398, Marietta, GA); Piedmont Providers LLC (NPI 1548273592, Jasper, GA); Quincy Physicians & Surgeons Clinic, PLLC (NPI 1114105749, Winchester, IL); Mayo Clinic Health System-Southwest Wisconsin Region, Inc. (NPI 1629056049, La Crosse, WI); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1990
## Record status
- **NPPES last updated:** June 10, 2026
- **Other identifiers:** Medicaid 314129659C (GA)
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Source: [NPI Profile](https://npiprofile.com/npi/1376503128) · Data from the CMS NPPES public registry.