Dr. Kathryn L. Masselam Hatch, MD
- Medicare services, 2024
- 931
- Medicare patients, 2024
- 301
- Part D claims, 2024
- 571
- Hospital affiliations
- 2
- Industry payments
- $133,082
- 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. Masselam Hatch's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Kathryn L. Masselam Hatch is an ophthalmologist in Boston, Massachusetts
Dr. Masselam Hatch practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Masselam Hatch's NPI, 1528265824, was assigned on June 29, 2007. Dr. Masselam Hatch graduated from University of Vermont College of Medicine in 2003. Dr. Masselam Hatch holds Massachusetts license 231448.
- NPI
- 1528265824NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2466547781
- NPI enumeration date
- June 29, 2007
- 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
- Female
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kathryn L. Masselam Hatch practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Masselam Hatch'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. Kathryn L. Masselam Hatch is affiliated with 4 sites of care and 1 medical group
Dr. Masselam Hatch's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Masselam Hatch is also affiliated with Massachusetts Eye and Ear. Dmand AI also links Dr. Masselam Hatch to 1 more community health center, 1 group practice or clinic 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. Kathryn L. Masselam Hatch's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Masselam Hatch 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. Kathryn L. Masselam Hatch is one of 617 ophthalmologists in Massachusetts
Ophthalmology is Dr. Masselam Hatch's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Masselam Hatch is licensed in Massachusetts.
Specialties and state licenses
- Ophthalmology, MassachusettsPrimary
Ophthalmologists near Dr. Masselam Hatch
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. Kathryn L. Masselam Hatch billed Medicare for 931 services in 2024
CMS data shows 931 Medicare services from Dr. Masselam Hatch across 15 procedure codes in 2024, for 301 Medicare patients. Medicare paid $105,624 for them.
Dr. Masselam Hatch's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Tests and treatments
- 2023: 6382024: 6124%
- Surgery
- 2023: 1602024: 1706%
- Office and hospital visits
- 2023: 1442024: 1493%
Where Dr. Masselam Hatch's Medicare services took place, 2024
- In an office86092%
- In a facility718%
Dr. Masselam Hatch compared with the Massachusetts median for ophthalmologists, 2024
- Dr. Masselam Hatch
- Massachusetts median
- Medicare services
- 931vs 1,59842% below
- Medicare patients
- 301vs 59449% below
- Part D claims
- 485vs 54511% below
Medians across 612 ophthalmologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Masselam Hatch'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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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Masselam Hatch and other ophthalmologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kathryn L. Masselam Hatch treated 301 Medicare patients in 2024, average age 73
CMS counts 301 Medicare patients who saw Dr. Masselam Hatch in 2024. The largest group is 65 to 74, with 129 patients. 67% of them have high cholesterol, and 58% have high blood pressure. 13% are also on Medicaid. Their average risk score is 0.91, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Masselam Hatch's median patient age at 66, with 51% women.
Dr. Masselam Hatch's Medicare patients by age, 2024
Dr. Masselam Hatch's Medicare patients by sex, 2024
- Women16856%
- Men13344%
Chronic conditions among Dr. Masselam Hatch's Medicare patients, 2024
- High cholesterol67%
- High blood pressure58%
- Arthritis43%
- Anxiety25%
- Mood disorders23%
- Depression20%
- Ischemic heart disease20%
- Osteoporosis20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Masselam Hatch's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 66
Patient panel by sex, all payers
- Women51%
- Men48%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kathryn L. Masselam Hatch wrote 571 Medicare Part D claims in 2024
In 2024, Dr. Masselam Hatch wrote 571 Medicare Part D claims for 190 patients. 42% of them were for generic drugs. CMS names the drug for 485 of them, across 17 drugs with 11 or more claims each, at $116,284 in total drug cost. In 2023, CMS named 516 claims across 13 drugs.
Dr. Masselam Hatch's Part D claims by kind of drug, 2024
- Generic242 claims42%
- Brand-name329 claims58%
Dr. Masselam Hatch'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.
Drug classes CMS tracks in Dr. Masselam Hatch's Part D claims, 2024
- Antibiotics5%30 of 571 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 5162024: 4856%
Drugs named by CMS: 17 in 2024, 13 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. Kathryn L. Masselam Hatch ranks in the 81st percentile for cataract surgery in Medicare
Dr. Masselam Hatch accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS counts 159 procedures of cataract surgery by Dr. Masselam Hatch, more than 81% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
Where Dr. Masselam Hatch ranks in Medicare procedure volume
- Cataract surgery
- 81st percentile159 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. Kathryn L. Masselam Hatch received $133,082 in industry payments from 2016 to 2025
CMS Open Payments shows 278 general payments to Dr. Masselam Hatch from 29 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 77% of the total. Glaukos Corporation paid the most, $36,316.
General payments to Dr. Masselam Hatch by program year, 2016 to 2025
General payments to Dr. Masselam Hatch by kind, 2016 to 2025
- Consulting fees$101,77277%
- Food and beverage$13,34110%
- Honoraria$7,4286%
- Education speaker fees$5,4004%
- Other$5,0314%
Companies that paid Dr. Masselam Hatch the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Kathryn L. Masselam Hatch graduated from University of Vermont College of Medicine
Dr. Masselam Hatch graduated from University of Vermont College of Medicine in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Kathryn L. Masselam Hatch'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) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. Kathryn L. Masselam Hatch
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. Kathryn L. Masselam Hatch's NPI number?
Dr. Kathryn L. Masselam Hatch's NPI number is 1528265824. It was assigned on June 29, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. Kathryn L. Masselam Hatch?
Dr. Kathryn L. Masselam Hatch is an ophthalmologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Kathryn L. Masselam Hatch practice?
Dr. Masselam Hatch practices at 55 Fruit Street, Boston, MA 02114. Dr. Masselam Hatch's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Masselam Hatch to 1 community health center, 1 group practice or clinic and 1 medical group.
What is Dr. Kathryn L. Masselam Hatch's office phone number?
The practice phone on file for Dr. Masselam Hatch is (617) 726-2000.
What is Dr. Kathryn L. Masselam Hatch's medical license number?
Dr. Masselam Hatch holds Massachusetts license 231448.
Which hospitals is Dr. Kathryn L. Masselam Hatch affiliated with?
Dr. Masselam Hatch practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Masselam Hatch is also affiliated with Massachusetts Eye and Ear.
Does Dr. Kathryn L. Masselam Hatch accept Medicare?
Yes. CMS data shows Dr. Masselam Hatch billed Medicare for 931 services in 2024, and Dr. Masselam Hatch accepts Medicare assignment.
How many Medicare patients does Dr. Kathryn L. Masselam Hatch see?
CMS counts 301 Medicare patients who saw Dr. Masselam Hatch in 2024, with an average age of 73.
What services does Dr. Kathryn L. Masselam Hatch bill to Medicare?
In 2024, Dr. Masselam Hatch's most billed Medicare services were eye exam or test (92025), eye exam or test (92014) and eye exam or test (92012).
Where did Dr. Kathryn L. Masselam Hatch go to medical school?
Dr. Masselam Hatch graduated from University of Vermont College of Medicine in 2003.
Show 3 more questionsShow fewer questions
What drugs does Dr. Kathryn L. Masselam Hatch prescribe most?
In 2024 Medicare Part D data, Dr. Masselam Hatch's most prescribed drugs by claims were Prednisolone Acetate, Erythromycin and Restasis.
Has Dr. Kathryn L. Masselam Hatch received payments from drug or device companies?
CMS Open Payments shows $133,082 in general payments to Dr. Masselam Hatch from 29 companies from 2016 to 2025. The largest total came from Glaukos Corporation.
How long has Dr. Kathryn L. Masselam Hatch been practicing?
Dr. Masselam Hatch graduated from medical school in 2003, 23 years ago.
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