Dr. Gail E. Semigran, MD
- Medicare services, 2024
- 466
- Medicare patients, 2024
- 182
- Part D claims, 2024
- 421
- Hospital affiliations
- 3
- Medical groups
- 2
- 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. Semigran's professional email, personal email and mobile number
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Dr. Gail E. Semigran is a cardiologist in Boston, Massachusetts
Dr. Semigran practices at Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham.
Dr. Semigran's NPI, 1801872205, was assigned on December 16, 2005. Dr. Semigran graduated from Harvard Medical School in 1988. Dr. Semigran holds Massachusetts license 73775.
- NPI
- 1801872205NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5193709780
- NPI enumeration date
- December 16, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (617) 726-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gail E. Semigran practices at Massachusetts General Hospital in Boston, Massachusetts
Dr. Semigran'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. Gail E. Semigran is affiliated with 5 sites of care and 2 medical groups
Dr. Semigran's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dr. Semigran is also affiliated with Brigham and Women's Hospital. The medical group on file is Massachusetts General Physicians Organization (MGPO). Dmand AI also links Dr. Semigran to 1 more hospital, 1 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. Gail E. Semigran's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Semigran practices, 5 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 |
| +4 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gail E. Semigran is one of 840 cardiologists in Massachusetts
Cardiovascular disease is Dr. Semigran's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Semigran is licensed in Massachusetts.
Specialties and state licenses
- Cardiovascular disease, MassachusettsPrimary
Cardiologists near Dr. Semigran
Counts of cardiologists 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. Gail E. Semigran billed Medicare for 466 services in 2024
CMS data shows 466 Medicare services from Dr. Semigran across 7 procedure codes in 2024, for 182 Medicare patients. Medicare paid $39,169 for them.
Dr. Semigran's Medicare services by type, 2024
- Office and hospital visits352
- Tests and treatments114
Where Dr. Semigran's Medicare services took place, 2024
- In an office25054%
- In a facility21646%
Dr. Semigran compared with the Massachusetts median for cardiologists, 2024
- Dr. Semigran
- Massachusetts median
- Medicare services
- 466vs 1,61271% below
- Medicare patients
- 182vs 95681% below
- Part D claims
- 304vs 84664% below
Medians across 817 cardiologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Semigran'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. Gail E. Semigran treated 182 Medicare patients in 2024, average age 76
CMS counts 182 Medicare patients who saw Dr. Semigran in 2024. The largest group is 75 to 84, with 79 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 25% are also on Medicaid. Their average risk score is 2.16, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Semigran's median patient age at 74, with 47% women.
Dr. Semigran's Medicare patients by age, 2024
Dr. Semigran's Medicare patients by sex, 2024
- Women8547%
- Men9753%
Chronic conditions among Dr. Semigran's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Ischemic heart disease74%
- Heart failure52%
- Arthritis46%
- Atrial fibrillation46%
- Chronic kidney disease44%
- Diabetes39%
Share of Medicare patients with each condition. A patient can have several.
Dr. Semigran's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women47%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gail E. Semigran wrote 421 Medicare Part D claims in 2024
In 2024, Dr. Semigran wrote 421 Medicare Part D claims for 76 patients. 91% of them were for generic drugs. CMS names the drug for 304 of them, across 9 drugs with 11 or more claims each, at $22,398 in total drug cost.
Dr. Semigran's Part D claims by kind of drug, 2024
- Generic382 claims91%
- Brand-name39 claims9%
Dr. Semigran'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.
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. Gail E. Semigran offers telehealth to Medicare patients
Dr. Semigran accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Semigran as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Gail E. Semigran graduated from Harvard Medical School
Dr. Semigran graduated from Harvard Medical School in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gail E. Semigran'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) |
| 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. Gail E. Semigran
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. Gail E. Semigran's NPI number?
Dr. Gail E. Semigran's NPI number is 1801872205. It was assigned on December 16, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Gail E. Semigran?
Dr. Gail E. Semigran is a cardiologist in Boston, Massachusetts. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Gail E. Semigran practice?
Dr. Semigran practices at 55 Fruit Street, Boston, MA 02114. Dr. Semigran's primary practice is Massachusetts General Hospital in Boston, Massachusetts, part of Mass General Brigham. Dmand AI also links Dr. Semigran to 1 hospital, 1 community health center, 1 group practice or clinic and 1 medical group.
What is Dr. Gail E. Semigran's office phone number?
The practice phone on file for Dr. Semigran is (617) 726-2000.
What is Dr. Gail E. Semigran's medical license number?
Dr. Semigran holds Massachusetts license 73775.
Which hospitals is Dr. Gail E. Semigran affiliated with?
Dr. Semigran practices at Massachusetts General Hospital in Boston, Massachusetts. Dr. Semigran is also affiliated with Brigham and Women's Hospital. Dmand AI links Dr. Semigran to 1 more hospital.
What medical group is Dr. Gail E. Semigran part of?
Dr. Semigran is linked to Massachusetts General Physicians Organization (MGPO). Dmand AI links Dr. Semigran to 1 more medical group.
Does Dr. Gail E. Semigran accept Medicare?
Yes. CMS data shows Dr. Semigran billed Medicare for 466 services in 2024, and Dr. Semigran accepts Medicare assignment.
Does Dr. Gail E. Semigran offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Semigran as offering telehealth services.
How many Medicare patients does Dr. Gail E. Semigran see?
CMS counts 182 Medicare patients who saw Dr. Semigran in 2024, with an average age of 76.
Show 4 more questionsShow fewer questions
What services does Dr. Gail E. Semigran bill to Medicare?
In 2024, Dr. Semigran's most billed Medicare services were hospital inpatient care (99232), office visit, established patient (99215) and heart test or procedure (93000).
Where did Dr. Gail E. Semigran go to medical school?
Dr. Semigran graduated from Harvard Medical School in 1988.
What drugs does Dr. Gail E. Semigran prescribe most?
In 2024 Medicare Part D data, Dr. Semigran's most prescribed drugs by claims were Metoprolol Succinate, Atorvastatin Calcium and Amlodipine Besylate.
How long has Dr. Gail E. Semigran been practicing?
Dr. Semigran graduated from medical school in 1988, 38 years ago.
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