Dr. Grayson Wilkes Armstrong, MD, MPH
- Medicare services, 2024
- 472
- Medicare patients, 2024
- 237
- Part D claims, 2024
- 372
- Hospital affiliations
- 3
- Industry payments
- $8,945
- Practice address
- 55 Fruit Street, Boston, MA 02114
- Practice phone
- Call (617) 726-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Armstrong's professional email, personal email and mobile number
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Dr. Grayson Wilkes Armstrong is an ophthalmologist in Boston, Massachusetts
Dr. Armstrong practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Armstrong's NPI, 1205213972, was assigned on May 1, 2015. Dr. Armstrong holds Massachusetts license 278428.
- NPI
- 1205213972NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961706734
- NPI enumeration date
- May 1, 2015
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (617) 726-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 37
- Medical school graduation
- 2015
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Grayson Wilkes Armstrong practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Armstrong's primary practice is Massachusetts General Hospital, at 55 Fruit Street, Boston, MA 02114 in Suffolk County. The practice phone is (617) 726-2000.
- Massachusetts General Hospital55 Fruit Street, Boston, MA 02114 · Suffolk CountyPhone(617) 726-2000
Source: Dmand AI Affiliation Data
Dr. Grayson Wilkes Armstrong is affiliated with 4 sites of care and 1 medical group
Dr. Armstrong's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Armstrong is also affiliated with Massachusetts Eye and Ear. Dmand AI also links Dr. Armstrong to 1 more hospital, 1 community health center and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Grayson Wilkes Armstrong's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Armstrong practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Massachusetts General Hospital | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Grayson Wilkes Armstrong is one of 617 ophthalmologists in Massachusetts
Ophthalmology is Dr. Armstrong's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Armstrong is licensed in Massachusetts.
Specialties and state licenses
- Ophthalmology, MassachusettsPrimary
Ophthalmologists near Dr. Armstrong
Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Grayson Wilkes Armstrong billed Medicare for 472 services in 2024
CMS data shows 472 Medicare services from Dr. Armstrong across 11 procedure codes in 2024, for 237 Medicare patients. Medicare paid $32,143 for them.
Dr. Armstrong's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 1342024: 268100%
- Office and hospital visits
- 2023: 1042024: 16660%
- Surgery
- 2023: 202024: 3890%
Where Dr. Armstrong's Medicare services took place, 2024
- In an office15733%
- In a facility31567%
Dr. Armstrong compared with the Massachusetts median for ophthalmologists, 2024
- Dr. Armstrong
- Massachusetts median
- Medicare services
- 472vs 1,59870% below
- Medicare patients
- 237vs 59460% below
- Part D claims
- 308vs 54543% below
Medians across 612 ophthalmologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Armstrong's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Grayson Wilkes Armstrong treated 237 Medicare patients in 2024, average age 74
CMS counts 237 Medicare patients who saw Dr. Armstrong in 2024. The largest group is 65 to 74, with 100 patients. 73% of them have high blood pressure, and 71% have high cholesterol. 24% are also on Medicaid. Their average risk score is 1.18, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Armstrong's median patient age at 73, with 55% women.
Dr. Armstrong's Medicare patients by age, 2024
Dr. Armstrong's Medicare patients by sex, 2024
- Women13758%
- Men10042%
Chronic conditions among Dr. Armstrong's Medicare patients, 2024
- High blood pressure73%
- High cholesterol71%
- Arthritis44%
- Anxiety29%
- Diabetes29%
- Ischemic heart disease27%
- Chronic kidney disease26%
- Mood disorders26%
Share of Medicare patients with each condition. A patient can have several.
Dr. Armstrong's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women55%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Grayson Wilkes Armstrong wrote 372 Medicare Part D claims in 2024
In 2024, Dr. Armstrong wrote 372 Medicare Part D claims for 110 patients. 61% of them were for generic drugs. CMS names the drug for 308 of them, across 5 drugs with 11 or more claims each, at $15,565 in total drug cost. In 2023, CMS named 508 claims across 12 drugs.
Dr. Armstrong's Part D claims by kind of drug, 2024
- Generic227 claims61%
- Brand-name145 claims39%
Dr. Armstrong's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5082024: 30839%
Drugs named by CMS: 5 in 2024, 12 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Grayson Wilkes Armstrong ranks in the 72nd percentile for cataract surgery in Medicare
Dr. Armstrong accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 83 procedures of cataract surgery by Dr. Armstrong, more than 72% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Armstrong ranks in Medicare procedure volume
- Cataract surgery
- 72nd percentile83 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Grayson Wilkes Armstrong received $8,945 in industry payments from 2019 to 2025
CMS Open Payments shows 34 general payments to Dr. Armstrong from 12 drug and device companies from 2019 to 2025. Consulting fees make up the largest share, 55% of the total. Genentech, Inc. paid the most, $6,417.
General payments to Dr. Armstrong by program year, 2019 to 2025
General payments to Dr. Armstrong by kind, 2019 to 2025
- Consulting fees$4,93555%
- Food and beverage$2,55029%
- Travel and lodging$1,45916%
Companies that paid Dr. Armstrong the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Grayson Wilkes Armstrong's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Grayson Wilkes Armstrong
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Grayson Wilkes Armstrong's NPI number?
Dr. Grayson Wilkes Armstrong's NPI number is 1205213972. It was assigned on May 1, 2015, and it is active in the NPI Registry.
What kind of doctor is Dr. Grayson Wilkes Armstrong?
Dr. Grayson Wilkes Armstrong is an ophthalmologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Grayson Wilkes Armstrong practice?
Dr. Armstrong practices at 55 Fruit Street, Boston, MA 02114. Dr. Armstrong's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Armstrong to 1 hospital, 1 community health center and 1 medical group.
What is Dr. Grayson Wilkes Armstrong's office phone number?
The practice phone on file for Dr. Armstrong is (617) 726-2000.
What is Dr. Grayson Wilkes Armstrong's medical license number?
Dr. Armstrong holds Massachusetts license 278428.
Which hospitals is Dr. Grayson Wilkes Armstrong affiliated with?
Dr. Armstrong practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Armstrong is also affiliated with Massachusetts Eye and Ear. Dmand AI links Dr. Armstrong to 1 more hospital.
Does Dr. Grayson Wilkes Armstrong accept Medicare?
Yes. CMS data shows Dr. Armstrong billed Medicare for 472 services in 2024, and Dr. Armstrong accepts Medicare assignment.
How many Medicare patients does Dr. Grayson Wilkes Armstrong see?
CMS counts 237 Medicare patients who saw Dr. Armstrong in 2024, with an average age of 74.
What services does Dr. Grayson Wilkes Armstrong bill to Medicare?
In 2024, Dr. Armstrong's most billed Medicare services were eye exam or test (92134), eye exam or test (92014) and office visit, established patient (99214).
What drugs does Dr. Grayson Wilkes Armstrong prescribe most?
In 2024 Medicare Part D data, Dr. Armstrong's most prescribed drugs by claims were Prednisolone Acetate, Moxifloxacin and Ketorolac Tromethamine.
Has Dr. Grayson Wilkes Armstrong received payments from drug or device companies?
CMS Open Payments shows $8,945 in general payments to Dr. Armstrong from 12 companies from 2019 to 2025. The largest total came from Genentech, Inc.
How long has Dr. Grayson Wilkes Armstrong been practicing?
Dr. Armstrong graduated from medical school in 2015, 11 years ago.
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