Dr. Marwan Massouh, MD
- Medicare services, 2024
- 1,075
- Medicare patients, 2024
- 338
- Part D claims, 2024
- 910
- Hospital affiliations
- 5
- Industry payments
- $915
- Practice address
- 400 S Clark St, Butte, MT 59701
- Practice phone
- Call (406) 723-2500
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Massouh's professional email, personal email and mobile number
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Dr. Marwan Massouh is a hematologist and oncologist in Butte, Montana
Dr. Massouh practices at St. James Hospital in Butte, Montana, part of Intermountain Health.
Dr. Massouh's NPI, 1508841669, was assigned on December 13, 2005. Dr. Massouh holds Ohio license 35056179.
- NPI
- 1508841669NPI Registry (opens in a new tab)
- Medicare PAC ID
- 6709785702
- NPI enumeration date
- December 13, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (406) 723-2500
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Marwan Massouh practices at St. James Hospital in Butte, Montana
Dr. Massouh's primary practice is St. James Hospital, at 400 S Clark St, Butte, MT 59701 in Silver Bow County. The practice phone is (406) 723-2500.
- St. James Hospital400 S Clark St, Butte, MT 59701 · Silver Bow CountyPhone(406) 723-2500
Source: Dmand AI Affiliation Data
Dr. Marwan Massouh is affiliated with 8 sites of care and 4 medical groups
Dr. Massouh's primary practice is St. James Hospital in Butte, Montana, part of Intermountain Health. Dr. Massouh is also affiliated with Firelands Regional Medical Center. The medical group on file is SCL Health Medical Group - Butte. Dmand AI also links Dr. Massouh to 3 more hospitals, 3 medical groups, 2 group practices and clinics and 1 physician office, 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. Marwan Massouh's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Massouh practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. James Hospital | Available with a free account |
| +7 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Marwan Massouh is one of 53 hematologists and oncologists in Montana
Hematology and oncology is Dr. Massouh's primary specialty in the NPI Registry, under taxonomy code 207RH0003X. Dr. Massouh is licensed in Ohio.
Specialties and state licenses
- Hematology and oncology, OhioPrimary
Hematologists and oncologists near Dr. Massouh
Counts of hematologists and oncologists 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. Marwan Massouh billed Medicare for 1,075 services in 2024
CMS data shows 1,075 Medicare services from Dr. Massouh across 4 procedure codes in 2024, all of them office visits, for 338 Medicare patients. Medicare paid $77,190 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Massouh's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1,1172024: 1,0754%
Dr. Massouh compared with the Montana median for hematologists and oncologists, 2024
- Dr. Massouh
- Montana median
- Medicare services
- 1,075vs 1,050Close to median
- Medicare patients
- 338vs 27025% above
- Part D claims
- 611vs 48825% above
Medians across 49 hematologists and oncologists in Montana with Dmand AI profiles that report each measure.
Dr. Massouh'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. Marwan Massouh treated 338 Medicare patients in 2024, average age 74
CMS counts 338 Medicare patients who saw Dr. Massouh in 2024. The largest group is 65 to 74, with 157 patients. 64% of them have high blood pressure, and 51% have high cholesterol. 17% are also on Medicaid. Their average risk score is 1.85, 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. Massouh's median patient age at 74, with 58% women.
Dr. Massouh's Medicare patients by age, 2024
Dr. Massouh's Medicare patients by sex, 2024
- Women18154%
- Men15746%
Chronic conditions among Dr. Massouh's Medicare patients, 2024
- High blood pressure64%
- High cholesterol51%
- Cancer47%
- Arthritis37%
- Mood disorders30%
- Depression29%
- Diabetes29%
- COPD25%
Share of Medicare patients with each condition. A patient can have several.
Dr. Massouh'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
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Marwan Massouh wrote 910 Medicare Part D claims in 2024
In 2024, Dr. Massouh wrote 910 Medicare Part D claims for 193 patients. 79% of them were for generic drugs. CMS names the drug for 611 of them, across 24 drugs with 11 or more claims each, at $950,902 in total drug cost. In 2023, CMS named 770 claims across 25 drugs.
Dr. Massouh's Part D claims by kind of drug, 2024
- Generic715 claims79%
- Brand-name195 claims21%
Dr. Massouh'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. Massouh's Part D claims, 2024
- Opioids5%43 of 910 claims
- Antibiotics7%60 of 910 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: 7702024: 61121%
Drugs named by CMS: 24 in 2024, 25 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. Marwan Massouh takes part in Medicare
Dr. Massouh 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. Marwan Massouh received $915 in industry payments from 2016 to 2025
CMS Open Payments shows 17 general payments to Dr. Massouh from 11 drug and device companies from 2016 to 2025. Education make up the largest share, 85% of the total. Sanofi and Genzyme US Companies paid the most, $250.
General payments to Dr. Massouh by program year, 2016 to 2025
General payments to Dr. Massouh by kind, 2016 to 2025
- Education$78285%
- Food and beverage$13315%
Companies that paid Dr. Massouh the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Marwan Massouh'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) |
| 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. Marwan Massouh
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. Marwan Massouh's NPI number?
Dr. Marwan Massouh's NPI number is 1508841669. It was assigned on December 13, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Marwan Massouh?
Dr. Marwan Massouh is a hematologist and oncologist in Butte, Montana. The primary specialty in the NPI Registry is Hematology & Oncology Physician (taxonomy code 207RH0003X).
Where does Dr. Marwan Massouh practice?
Dr. Massouh practices at 400 S Clark St, Butte, MT 59701. Dr. Massouh's primary practice is St. James Hospital in Butte, Montana, part of Intermountain Health. Dmand AI also links Dr. Massouh to 3 hospitals, 3 medical groups, 2 group practices and clinics and 1 physician office.
What is Dr. Marwan Massouh's office phone number?
The practice phone on file for Dr. Massouh is (406) 723-2500.
What is Dr. Marwan Massouh's medical license number?
Dr. Massouh holds Ohio license 35056179.
Which hospitals is Dr. Marwan Massouh affiliated with?
Dr. Massouh practices at St. James Hospital in Butte, Montana. Dr. Massouh is also affiliated with Firelands Regional Medical Center. Dmand AI links Dr. Massouh to 3 more hospitals.
What medical group is Dr. Marwan Massouh part of?
Dr. Massouh is linked to SCL Health Medical Group - Butte. Dmand AI links Dr. Massouh to 3 more medical groups.
Does Dr. Marwan Massouh accept Medicare?
Yes. CMS data shows Dr. Massouh billed Medicare for 1,075 services in 2024, and Dr. Massouh accepts Medicare assignment.
How many Medicare patients does Dr. Marwan Massouh see?
CMS counts 338 Medicare patients who saw Dr. Massouh in 2024, with an average age of 74.
What services does Dr. Marwan Massouh bill to Medicare?
In 2024, Dr. Massouh's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99204) and office visit, new patient (99205).
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What drugs does Dr. Marwan Massouh prescribe most?
In 2024 Medicare Part D data, Dr. Massouh's most prescribed drugs by claims were Potassium Chloride, Letrozole and Eliquis.
Has Dr. Marwan Massouh received payments from drug or device companies?
CMS Open Payments shows $915 in general payments to Dr. Massouh from 11 companies from 2016 to 2025. The largest total came from Sanofi and Genzyme US Companies.
How long has Dr. Marwan Massouh been practicing?
Dr. Massouh graduated from medical school in 1982, 44 years ago.
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