DAVID R GREATOREX M.D.
NPI 1164409264
Radiology - Diagnostic Radiology in Portland, ME
About David R Greatorex M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DAVID R GREATOREX M.D. (NPI 1164409264) is an individual diagnostic radiology provider in Portland, Maine, licensed in Maine (015632) and active in the NPI registry since December 2005.
NPPES Registry Identity
Specialties & Licenses
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)
David R Greatorex M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show David Greatorex reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Dover, NH 03820
- Reassigned Medicare billing, New Hampshire enrollment
- 14 clinicians in this Medicare group
Medford, MA 02155
- Reassigned Medicare billing, New Hampshire enrollment
- 121 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.
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 David Greatorex's NPI number?
The NPI number for David Greatorex is 1164409264. It was assigned to this individual provider in the NPPES registry on December 29, 2005.
Where is David Greatorex located?
David Greatorex practices at 144 State St, Portland, ME 04101. The listed phone number is (207) 879-3000.
What is David Greatorex's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is David Greatorex enrolled in Medicare?
Yes. David Greatorex is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for David Greatorex's services?
According to the CMS Revalidation Reassignment List (October 2026 release), David Greatorex reassigns Medicare benefits to 2 organizations: Seacoast Radiology, PA (Dover, NH) and Mass General Brigham Community Physicians Inc (Medford, MA). 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 Greatorex's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does David Greatorex accept?
Health plans from Taro Health list David Greatorex 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 Greatorex was last updated on July 16, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# David R Greatorex, M.D. · NPI 1164409264
Diagnostic Radiology physician in Portland, Maine. Individual provider, active in the CMS NPPES registry since December 29, 2005.
## Identity
- **NPI:** 1164409264 (Entity type: Individual)
- **Enumerated:** December 29, 2005
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** 015632 (Maine)
- **Sole proprietor:** No
## Practice location
- **Address:** 144 STATE ST, Portland, ME 04101-3776
- **Phone:** (207) 879-3000
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Seacoast Radiology, PA (NPI 1427020395, Dover, NH); Mass General Brigham Community Physicians Inc (NPI 1548638265, Medford, MA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 16, 2007
- **Other identifiers:** Medicare UPIN H41480
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Source: [NPI Profile](https://npiprofile.com/npi/1164409264) · Data from the CMS NPPES public registry.