DR. DAVID B GREENSTEIN MD
NPI 1235246281
Internal Medicine - Gastroenterology in Atlanta, GA
About Dr. David B Greenstein Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DAVID B GREENSTEIN MD (NPI 1235246281) is an individual gastroenterology provider in Atlanta, Georgia, licensed in Georgia (032574) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Johns Hopkins University School Of Medicine (1988).
NPPES Registry Identity
Specialties & Licenses
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. David B Greenstein 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
4Medicare enrollment records show David Greenstein reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Atlanta, GA 30305
- Reassigned Medicare billing, Georgia enrollment
- 1,389 clinicians in this Medicare group
Cumming, GA 30040
- Reassigned Medicare billing, Georgia enrollment
- 17 clinicians in this Medicare group
Cumming, GA 30040
- Reassigned Medicare billing, Georgia enrollment
- 7 clinicians in this Medicare group
Lagrange, GA 30240
- Reassigned Medicare billing, Georgia enrollment
- 1,506 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 30328 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ATLANTA, GA 30328
ATLANTA, GA 30328
ATLANTA, GA 30328
ATLANTA, GA 30328
ATLANTA, GA 30328
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 David Greenstein's NPI number?
The NPI number for David Greenstein is 1235246281. It was assigned to this individual provider in the NPPES registry on August 24, 2006.
Where is David Greenstein located?
David Greenstein practices at 20 Glenlake Pkwy Department Of Gastroenterology, Atlanta, GA 30328. The listed phone number is (770) 677-6247.
What is David Greenstein's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is David Greenstein enrolled in Medicare?
Yes. David Greenstein 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 David Greenstein's services?
According to the CMS Revalidation Reassignment List (October 2026 release), David Greenstein reassigns Medicare benefits to 4 organizations: The Southeast Permanente Medical Group (Atlanta, GA), Newco Gi LLC (Cumming, GA), Gi North Endoscopy.LLC (Cumming, GA) and Emory Specialty Associates, LLC (Lagrange, GA). 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 David Greenstein's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does David Greenstein accept?
Health plans from Alliant Health Plans, Inc. and Oscar Health list David Greenstein 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 David Greenstein was last updated on March 27, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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. David B Greenstein, MD · NPI 1235246281
Gastroenterology physician in Atlanta, Georgia. Individual provider, active in the CMS NPPES registry since August 24, 2006.
## Identity
- **NPI:** 1235246281 (Entity type: Individual)
- **Enumerated:** August 24, 2006
- **Primary specialty:** Internal Medicine - Gastroenterology · taxonomy 207RG0100X
- **State license:** 032574 (Georgia)
- **Sole proprietor:** No
## Practice location
- **Address:** 20 GLENLAKE PKWY, DEPARTMENT OF GASTROENTEROLOGY, Atlanta, GA 30328-3473
- **Phone:** (770) 677-6247 · **Fax:** (770) 677-7343
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): The Southeast Permanente Medical Group (NPI 1245266956, Atlanta, GA); Newco Gi LLC (NPI 1073999066, Cumming, GA); Gi North Endoscopy.LLC (NPI 1326555491, Cumming, GA); Emory Specialty Associates, LLC (NPI 1407864168, Lagrange, GA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Johns Hopkins University School Of Medicine, class of 1988
## Record status
- **NPPES last updated:** March 27, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1235246281) · Data from the CMS NPPES public registry.