Dr. Eric N. Diamond, MD
- Medicare services, 2024
- 545
- Medicare patients, 2024
- 314
- Part D claims, 2024
- 5,432
- Hospital affiliations
- 5
- Industry payments
- $4,823
- Practice address
- 75 Francis Street, Boston, MA 02115
- Practice phone
- Call (617) 732-5500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Diamond'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. Eric N. Diamond is an internist in Boston, Massachusetts
Dr. Diamond practices at Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Diamond's NPI, 1285607861, was assigned on February 13, 2006. Dr. Diamond graduated from Rowan University School of Osteopathic Medicine in 1983. Dr. Diamond holds Massachusetts license 54336.
- NPI
- 1285607861NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2961459847
- NPI enumeration date
- February 13, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (617) 732-5500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Eric N. Diamond practices at Brigham and Women's Hospital in Boston, Massachusetts
Dr. Diamond's primary practice is Brigham and Women's Hospital, at 75 Francis Street, Boston, MA 02115 in Suffolk County. The practice phone is (617) 732-5500.
- Brigham and Women's Hospital75 Francis Street, Boston, MA 02115 · Suffolk CountyPhone(617) 732-5500
Source: Dmand AI Affiliation Data
Dr. Eric N. Diamond is affiliated with 10 sites of care and 2 medical groups
Dr. Diamond's primary practice is Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Diamond is also affiliated with Massachusetts Eye and Ear. The medical group on file is Mass General Brigham Medical Group. Dmand AI also links Dr. Diamond to 3 more hospitals, 2 group practices and clinics, 2 home health agencies, 1 hospital outpatient department 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. Eric N. Diamond's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diamond practices, 10 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Brigham and Women's Hospital | Available with a free account |
| +9 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Eric N. Diamond is one of 5,528 internists in Massachusetts
Internal medicine is Dr. Diamond's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Diamond is licensed in Massachusetts.
Specialties and state licenses
- Internal medicine, MassachusettsPrimary
Internists near Dr. Diamond
Counts of internists 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. Eric N. Diamond billed Medicare for 545 services in 2024
CMS data shows 545 Medicare services from Dr. Diamond across 9 procedure codes in 2024, for 314 Medicare patients. Medicare paid $62,104 for them. Every service was in an office.
Dr. Diamond's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 3382024: 30410%
- Office and hospital visits
- 2023: 2972024: 19036%
- Tests and treatments
- 2023: 1122024: 5154%
Dr. Diamond compared with the Massachusetts median for internists, 2024
- Dr. Diamond
- Massachusetts median
- Medicare services
- 545vs 43126% above
- Medicare patients
- 314vs 19462% above
- Part D claims
- 4,874vs 40212.1 times
Medians across 5,369 internists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Diamond'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. Diamond and other internists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Eric N. Diamond treated 314 Medicare patients in 2024, average age 75
CMS counts 314 Medicare patients who saw Dr. Diamond in 2024. The largest group is 65 to 74, with 142 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 6% are also on Medicaid. Their average risk score is 1.01, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Diamond's median patient age at 68, with 24% women.
Dr. Diamond's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Diamond's Medicare patients by sex, 2024
- Women7524%
- Men23976%
Chronic conditions among Dr. Diamond's Medicare patients, 2024
- High cholesterol75%
- High blood pressure71%
- Arthritis44%
- Ischemic heart disease27%
- Diabetes24%
- Atrial fibrillation21%
- Chronic kidney disease20%
- Anxiety18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Diamond's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women24%
- Men75%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Eric N. Diamond wrote 5,432 Medicare Part D claims in 2024
In 2024, Dr. Diamond wrote 5,432 Medicare Part D claims for 500 patients. 90% of them were for generic drugs. CMS names the drug for 4,874 of them, across 80 drugs with 11 or more claims each, at $421,906 in total drug cost. In 2023, CMS named 5,026 claims across 85 drugs.
Dr. Diamond's Part D claims by kind of drug, 2024
- Generic4,875 claims90%
- Brand-name527 claims10%
- Other30 claims1%
Dr. Diamond'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. Diamond's Part D claims, 2024
- Opioids2%82 of 5,432 claims
- Antibiotics0%22 of 5,432 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: 5,0262024: 4,8743%
Drugs named by CMS: 80 in 2024, 85 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. Eric N. Diamond offers telehealth to Medicare patients
Dr. Diamond accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Diamond as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Eric N. Diamond received $4,823 in industry payments in 2018
CMS Open Payments shows 9 general payments to Dr. Diamond from 2 drug and device companies in 2018. Consulting fees make up the largest share, 46% of the total. Merck Sharp & Dohme Corporation paid the most, $4,251.
General payments to Dr. Diamond by kind, 2018 to 2018
- Consulting fees$2,20046%
- Travel and lodging$1,80237%
- Speaker and faculty fees$57212%
- Food and beverage$2505%
Companies that paid Dr. Diamond the most, 2018 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Eric N. Diamond graduated from Rowan University School of Osteopathic Medicine
Dr. Diamond graduated from Rowan University School of Osteopathic Medicine in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Eric N. Diamond'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) |
| 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. Eric N. Diamond
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. Eric N. Diamond's NPI number?
Dr. Eric N. Diamond's NPI number is 1285607861. It was assigned on February 13, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Eric N. Diamond?
Dr. Eric N. Diamond is an internist in Boston, Massachusetts. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Eric N. Diamond practice?
Dr. Diamond practices at 75 Francis Street, Boston, MA 02115. Dr. Diamond's primary practice is Brigham and Women's Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Diamond to 3 hospitals, 2 group practices and clinics, 2 home health agencies, 1 hospital outpatient department and 1 medical group.
What is Dr. Eric N. Diamond's office phone number?
The practice phone on file for Dr. Diamond is (617) 732-5500.
What is Dr. Eric N. Diamond's medical license number?
Dr. Diamond holds Massachusetts license 54336.
Which hospitals is Dr. Eric N. Diamond affiliated with?
Dr. Diamond practices at Brigham and Women's Hospital in Boston, Massachusetts. Dr. Diamond is also affiliated with Massachusetts Eye and Ear. Dmand AI links Dr. Diamond to 3 more hospitals.
What medical group is Dr. Eric N. Diamond part of?
Dr. Diamond is linked to Mass General Brigham Medical Group. Dmand AI links Dr. Diamond to 1 more medical group.
Does Dr. Eric N. Diamond accept Medicare?
Yes. CMS data shows Dr. Diamond billed Medicare for 545 services in 2024, and Dr. Diamond accepts Medicare assignment.
Does Dr. Eric N. Diamond offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Diamond as offering telehealth services.
How many Medicare patients does Dr. Eric N. Diamond see?
CMS counts 314 Medicare patients who saw Dr. Diamond in 2024, with an average age of 75.
Show 5 more questionsShow fewer questions
What services does Dr. Eric N. Diamond bill to Medicare?
In 2024, Dr. Diamond's most billed Medicare services were medicare service (G0439), office visit, established patient (99214) and office visit, established patient (99213).
Where did Dr. Eric N. Diamond go to medical school?
Dr. Diamond graduated from Rowan University School of Osteopathic Medicine in 1983.
What drugs does Dr. Eric N. Diamond prescribe most?
In 2024 Medicare Part D data, Dr. Diamond's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Lisinopril.
Has Dr. Eric N. Diamond received payments from drug or device companies?
CMS Open Payments shows $4,823 in general payments to Dr. Diamond from 2 companies from 2018 to 2018. The largest total came from Merck Sharp & Dohme Corporation.
How long has Dr. Eric N. Diamond been practicing?
Dr. Diamond graduated from medical school in 1983, 43 years ago.
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