IAN ARMSTRONG MD
NPI 1619556453
Radiology - Diagnostic Radiology in Boston, MA
About Ian Armstrong Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
IAN ARMSTRONG MD (NPI 1619556453) is an individual diagnostic radiology provider in Boston, Massachusetts, licensed in Massachusetts (1026333) and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS and is a graduate of Albert Einstein College Of Medicine Of Yeshiva University (2021).
NPPES Registry Identity
Specialties & Licenses
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Ian Armstrong Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
2Medicare enrollment records show Ian Armstrong reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts and New Hampshire enrollments
- 6,360 clinicians in this Medicare group
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 6,234 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 02114 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.
BOSTON, MA 02114
BOSTON, MA 02114
BOSTON, MA 02114
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 Ian Armstrong's NPI number?
The NPI number for Ian Armstrong is 1619556453. It was assigned to this individual provider in the NPPES registry on April 7, 2021.
Where is Ian Armstrong located?
Ian Armstrong practices at 55 Fruit St, Boston, MA 02114. The listed phone number is (617) 726-8755.
What is Ian Armstrong's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Ian Armstrong enrolled in Medicare?
Yes. Ian Armstrong is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Ian Armstrong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Ian Armstrong reassigns Medicare benefits to 2 organizations: Massachusetts General Physicians Organization Inc (Boston, MA) and The General Hospital Corporation (Boston, 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 Ian Armstrong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Ian Armstrong was last updated on May 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Ian Armstrong, MD · NPI 1619556453
Diagnostic Radiology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since April 7, 2021.
## Identity
- **NPI:** 1619556453 (Entity type: Individual)
- **Enumerated:** April 7, 2021
- **Primary specialty:** Radiology - Diagnostic Radiology · taxonomy 2085R0202X
- **State license:** 1026333 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 55 FRUIT ST, Boston, MA 02114-2696
- **Phone:** (617) 726-8755
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Massachusetts General Physicians Organization Inc (NPI 1801874573, Boston, MA); The General Hospital Corporation (NPI 1023049236, Boston, MA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Albert Einstein College Of Medicine Of Yeshiva University, class of 2021
## Record status
- **NPPES last updated:** May 11, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1619556453) · Data from the CMS NPPES public registry.