Dr. Isaac C. Leader, MD
- Medicare services, 2024
- 1,095
- Medicare patients, 2024
- 396
- Part D claims, 2024
- 336
- Hospital affiliations
- 2
- Industry payments
- $53
- Practice address
- 81 Highland Ave, Salem, MA 01970
- Practice phone
- Call (978) 354-2065
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
MGB Salem Hospital
Salem, Massachusetts
Find Dr. Leader'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. Isaac C. Leader is a hospitalist in Salem, Massachusetts
Dr. Leader practices at MGB Salem Hospital in Salem, Massachusetts.
Dr. Leader's NPI, 1275811655, was assigned on August 2, 2011. Dr. Leader graduated from University of Vermont College of Medicine in 2011. Dr. Leader holds New York license 275229-1.
- NPI
- 1275811655NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6204054570
- NPI enumeration date
- August 2, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (978) 354-2065
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 41
- Medical school graduation
- 2011
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Isaac C. Leader practices at MGB Salem Hospital in Salem, Massachusetts
Dr. Leader's primary practice is MGB Salem Hospital, at 81 Highland Ave, Salem, MA 01970 in Essex County. The practice phone is (978) 354-2065.
- MGB Salem Hospital81 Highland Ave, Salem, MA 01970 · Essex CountyPhone(978) 354-2065
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Isaac C. Leader is affiliated with 4 sites of care and 1 medical group
Dr. Leader's primary practice is MGB Salem Hospital in Salem, Massachusetts. Dr. Leader is also affiliated with Salem Hospital. The medical group on file is Mass General Brigham (formerly North Shore Physicians Group). Dmand AI also links Dr. Leader to 1 more hospital and 1 group practice or clinic, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Isaac C. Leader's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leader practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MGB Salem Hospital | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Isaac C. Leader is one of 502 hospitalists in Massachusetts
Hospitalist is Dr. Leader's primary specialty in the NPI Registry, under taxonomy code 208M00000X. Dr. Leader is licensed in New York.
Specialties and state licenses
- Hospitalist, New YorkPrimary
Hospitalists near Dr. Leader
Counts of hospitalists 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. Isaac C. Leader billed Medicare for 1,095 services in 2024
CMS data shows 1,095 Medicare services from Dr. Leader across 7 procedure codes in 2024, for 396 Medicare patients. Medicare paid $83,088 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Leader's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,0972024: 1,095No change
Dr. Leader compared with the Massachusetts median for hospitalists, 2024
- Dr. Leader
- Massachusetts median
- Medicare services
- 1,095vs 4642.4 times
- Medicare patients
- 396vs 25357% above
- Part D claims
- 112vs 6572% above
Medians across 477 hospitalists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Leader'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. Isaac C. Leader treated 396 Medicare patients in 2024, average age 78
CMS counts 396 Medicare patients who saw Dr. Leader in 2024. The largest group is 75 to 84, with 127 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 37% are also on Medicaid. Their average risk score is 2.73, 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. Leader's median patient age at 76, with 47% women.
Dr. Leader's Medicare patients by age, 2024
Dr. Leader's Medicare patients by sex, 2024
- Women20151%
- Men19549%
Chronic conditions among Dr. Leader's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease64%
- Arthritis60%
- Ischemic heart disease59%
- Anxiety54%
- Heart failure53%
- Mood disorders49%
Share of Medicare patients with each condition. A patient can have several.
Dr. Leader's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 76
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. Isaac C. Leader wrote 336 Medicare Part D claims in 2024
In 2024, Dr. Leader wrote 336 Medicare Part D claims for 184 patients. 87% of them were for generic drugs. CMS names the drug for 112 of them, across 8 drugs with 11 or more claims each, at $8,485 in total drug cost. In 2023, CMS named 97 claims across 6 drugs.
Dr. Leader's Part D claims by kind of drug, 2024
- Generic291 claims87%
- Brand-name and other45 claims13%
Dr. Leader'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. Leader's Part D claims, 2024
- Opioids4%13 of 336 claims
- Antibiotics20%66 of 336 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: 972024: 11215%
Drugs named by CMS: 8 in 2024, 6 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
How Dr. Isaac C. Leader takes part in Medicare
Dr. Leader accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Isaac C. Leader received $53 in industry payments from 2019 to 2024
CMS Open Payments shows 3 general payments to Dr. Leader from 2 drug and device companies from 2019 to 2024. Food and beverage make up the largest share, 100% of the total. Bristol-Myers Squibb Company paid the most, $32.
General payments to Dr. Leader by program year, 2019 to 2024
Companies that paid Dr. Leader the most, 2019 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Isaac C. Leader graduated from University of Vermont College of Medicine
Dr. Leader graduated from University of Vermont College of Medicine in 2011.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Isaac C. Leader'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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. Isaac C. Leader
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. Isaac C. Leader's NPI number?
Dr. Isaac C. Leader's NPI number is 1275811655. It was assigned on August 2, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Isaac C. Leader?
Dr. Isaac C. Leader is a hospitalist in Salem, Massachusetts. The primary specialty in the NPI Registry is Hospitalist Physician (taxonomy code 208M00000X).
Where does Dr. Isaac C. Leader practice?
Dr. Leader practices at 81 Highland Ave, Salem, MA 01970. Dr. Leader's primary practice is MGB Salem Hospital in Salem, Massachusetts. Dmand AI also links Dr. Leader to 1 hospital and 1 group practice or clinic.
What is Dr. Isaac C. Leader's office phone number?
The practice phone on file for Dr. Leader is (978) 354-2065.
What is Dr. Isaac C. Leader's medical license number?
Dr. Leader holds New York license 275229-1.
Which hospitals is Dr. Isaac C. Leader affiliated with?
Dr. Leader is affiliated with Salem Hospital. Dmand AI links Dr. Leader to 1 more hospital.
What medical group is Dr. Isaac C. Leader part of?
Dr. Leader is linked to Mass General Brigham (formerly North Shore Physicians Group).
Does Dr. Isaac C. Leader accept Medicare?
Yes. CMS data shows Dr. Leader billed Medicare for 1,095 services in 2024, and Dr. Leader accepts Medicare assignment.
How many Medicare patients does Dr. Isaac C. Leader see?
CMS counts 396 Medicare patients who saw Dr. Leader in 2024, with an average age of 78.
What services does Dr. Isaac C. Leader bill to Medicare?
In 2024, Dr. Leader's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99239).
Show 4 more questionsShow fewer questions
Where did Dr. Isaac C. Leader go to medical school?
Dr. Leader graduated from University of Vermont College of Medicine in 2011.
What drugs does Dr. Isaac C. Leader prescribe most?
In 2024 Medicare Part D data, Dr. Leader's most prescribed drugs by claims were Cephalexin, Metoprolol Succinate and Prednisone.
Has Dr. Isaac C. Leader received payments from drug or device companies?
CMS Open Payments shows $53 in general payments to Dr. Leader from 2 companies from 2019 to 2024. The largest total came from Bristol-Myers Squibb Company.
How long has Dr. Isaac C. Leader been practicing?
Dr. Leader graduated from medical school in 2011, 15 years ago.
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