GRAYSON WILKES ARMSTRONG M.D., M.P.H.
NPI 1205213972
Ophthalmology in Boston, MA
About Grayson Wilkes Armstrong M.d., M.p.h. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GRAYSON WILKES ARMSTRONG M.D., M.P.H. (NPI 1205213972) is an individual ophthalmology provider in Boston, Massachusetts, licensed in Massachusetts (278428) and active in the NPI registry since May 2015. He is enrolled in Medicare PECOS, is affiliated with Massachusetts General Hospital, and is a graduate of Other (2015).
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
Grayson Wilkes Armstrong M.d., M.p.h. 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 Reassignment
Medicare enrollment records show Grayson Armstrong reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Boston, MA 02114
- Reassigned Medicare billing, Massachusetts enrollment
- 478 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 15
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 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Massachusetts General Hospital
Acute Care Hospitals · Boston, MAMassachusetts Eye And Ear Infirmary -
Acute Care Hospitals · Boston, MAFaulkner Hospital-Brigham And Women's
Acute Care Hospitals · Boston, MAPhysician 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
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 Grayson Armstrong's NPI number?
The NPI number for Grayson Armstrong is 1205213972. It was assigned to this individual provider in the NPPES registry on May 1, 2015.
Where is Grayson Armstrong located?
Grayson Armstrong practices at 243 Charles St, Boston, MA 02114. The listed phone number is (617) 523-7900.
What is Grayson Armstrong's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Grayson Armstrong enrolled in Medicare?
Yes. Grayson Armstrong 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 organization bills Medicare for Grayson Armstrong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Grayson Armstrong reassigns Medicare benefits to Massachusetts Eye And Ear Associates, Inc. (Boston, MA). The 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 Grayson Armstrong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Grayson Armstrong accept?
Health plans from Anthem Blue Cross and Blue Shield list Grayson Armstrong 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 Grayson Armstrong affiliated with any hospitals?
According to CMS data, Grayson Armstrong is affiliated with Massachusetts General Hospital, Massachusetts Eye And Ear Infirmary - and Faulkner Hospital-Brigham And Women's.
When was this NPI record last updated?
The NPPES record for Grayson Armstrong was last updated on May 30, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# Grayson Wilkes Armstrong, M.D., M.P.H. · NPI 1205213972
Ophthalmology physician in Boston, Massachusetts. Individual provider, active in the CMS NPPES registry since May 1, 2015.
## Identity
- **NPI:** 1205213972 (Entity type: Individual)
- **Enumerated:** May 1, 2015
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** 278428 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 243 CHARLES ST, Boston, MA 02114-3002
- **Phone:** (617) 523-7900
## 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:** Massachusetts Eye And Ear Associates, Inc. (NPI 1932574332, Boston, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** May 30, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1205213972) · Data from the CMS NPPES public registry.