Dr. James Maserejian, MD
- Medicare services, 2024
- 749
- Medicare patients, 2024
- 261
- Part D claims, 2024
- 288
- Hospital affiliations
- 3
- Industry payments
- $1,959
- Practice address
- 3700 Washington Avenue, Evansville, IN 47750
- Practice phone
- Call (812) 485-5614
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St. Vincent Evansville - Unit
Acute Care Hospital-Unit · Evansville, Indiana
Find Dr. Maserejian'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. James Maserejian is an internist in Evansville, Indiana
Dr. Maserejian practices at St. Vincent Evansville - Unit in Evansville, Indiana.
Dr. Maserejian's NPI, 1326080037, was assigned on June 10, 2006. Dr. Maserejian graduated from University of Massachusetts Medical School in 1995. Dr. Maserejian holds Indiana license 01051918A.
- NPI
- 1326080037NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0042347395
- NPI enumeration date
- June 10, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (812) 485-5614
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 57
- Medical school graduation
- 1995
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James Maserejian practices at St. Vincent Evansville - Unit in Evansville, Indiana
Dr. Maserejian's primary practice is St. Vincent Evansville - Unit, at 3700 Washington Avenue, Evansville, IN 47750 in Vanderburgh County. The practice phone is (812) 485-5614.
- St. Vincent Evansville - Unit3700 Washington Avenue, Evansville, IN 47750 · Vanderburgh CountyPhone(812) 485-5614
Source: Dmand AI Affiliation Data
Dr. James Maserejian is affiliated with 4 sites of care and 1 medical group
Dr. Maserejian's primary practice is St. Vincent Evansville - Unit in Evansville, Indiana. Dr. Maserejian is also affiliated with Deaconess Midtown Hospital. The medical group on file is Ascension Medical Group St. Vincent - Evansville. Dmand AI also links Dr. Maserejian to 1 more hospital and 1 behavioral health center, each named with a free account.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. James Maserejian's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Maserejian practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St. Vincent Evansville - Unit | 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. James Maserejian is one of 1,987 internists in Indiana
Internal medicine is Dr. Maserejian's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Maserejian is licensed in Indiana.
Specialties and state licenses
- Internal medicine, IndianaPrimary
Internists near Dr. Maserejian
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. James Maserejian billed Medicare for 749 services in 2024
CMS data shows 749 Medicare services from Dr. Maserejian across 5 procedure codes in 2024, for 261 Medicare patients. Medicare paid $51,174 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Maserejian's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7122024: 7495%
Dr. Maserejian compared with the Indiana median for internists, 2024
- Dr. Maserejian
- Indiana median
- Medicare services
- 749vs 52044% above
- Medicare patients
- 261vs 21223% above
- Part D claims
- 94vs 15941% below
Medians across 1,948 internists in Indiana with Dmand AI profiles that report each measure.
Dr. Maserejian'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. Maserejian and other internists in Indiana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. James Maserejian treated 261 Medicare patients in 2024, average age 75
CMS counts 261 Medicare patients who saw Dr. Maserejian in 2024. The largest group is 75 to 84, with 107 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 27% are also on Medicaid. Their average risk score is 2.18, 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. Maserejian's median patient age at 75, with 60% women.
Dr. Maserejian's Medicare patients by age, 2024
Dr. Maserejian's Medicare patients by sex, 2024
- Women14355%
- Men11845%
Chronic conditions among Dr. Maserejian's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis63%
- Heart failure58%
- Ischemic heart disease56%
- Diabetes53%
- Chronic kidney disease51%
- Atrial fibrillation50%
Share of Medicare patients with each condition. A patient can have several.
Dr. Maserejian's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women60%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James Maserejian wrote 288 Medicare Part D claims in 2024
In 2024, Dr. Maserejian wrote 288 Medicare Part D claims for 120 patients. 89% of them were for generic drugs. CMS names the drug for 94 of them, across 7 drugs with 11 or more claims each, at $8,353 in total drug cost. In 2023, CMS named 14 claims across 1 drug.
Dr. Maserejian's Part D claims by kind of drug, 2024
- Generic255 claims89%
- Brand-name and other33 claims11%
Dr. Maserejian'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. Maserejian's Part D claims, 2024
- Antibiotics17%49 of 288 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: 142024: 94571%
Drugs named by CMS: 7 in 2024, 1 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. James Maserejian takes part in Medicare
Dr. Maserejian accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Skin biopsy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. James Maserejian received $1,959 in industry payments from 2016 to 2022
CMS Open Payments shows 130 general payments to Dr. Maserejian from 22 drug and device companies from 2016 to 2022. Food and beverage make up the largest share, 100% of the total. Janssen Pharmaceuticals, Inc paid the most, $375.
General payments to Dr. Maserejian by program year, 2016 to 2022
Companies that paid Dr. Maserejian the most, 2016 to 2022
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James Maserejian graduated from University of Massachusetts Medical School
Dr. Maserejian graduated from University of Massachusetts Medical School in 1995.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. James Maserejian'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 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. James Maserejian
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. James Maserejian's NPI number?
Dr. James Maserejian's NPI number is 1326080037. It was assigned on June 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. James Maserejian?
Dr. James Maserejian is an internist in Evansville, Indiana. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. James Maserejian practice?
Dr. Maserejian practices at 3700 Washington Avenue, Evansville, IN 47750. Dr. Maserejian's primary practice is St. Vincent Evansville - Unit in Evansville, Indiana. Dmand AI also links Dr. Maserejian to 1 hospital and 1 behavioral health center.
What is Dr. James Maserejian's office phone number?
The practice phone on file for Dr. Maserejian is (812) 485-5614.
What is Dr. James Maserejian's medical license number?
Dr. Maserejian holds Indiana license 01051918A.
Which hospitals is Dr. James Maserejian affiliated with?
Dr. Maserejian is affiliated with Deaconess Midtown Hospital. Dmand AI links Dr. Maserejian to 2 more hospitals.
What medical group is Dr. James Maserejian part of?
Dr. Maserejian is linked to Ascension Medical Group St. Vincent - Evansville.
Does Dr. James Maserejian accept Medicare?
Yes. CMS data shows Dr. Maserejian billed Medicare for 749 services in 2024, and Dr. Maserejian accepts Medicare assignment.
How many Medicare patients does Dr. James Maserejian see?
CMS counts 261 Medicare patients who saw Dr. Maserejian in 2024, with an average age of 75.
What services does Dr. James Maserejian bill to Medicare?
In 2024, Dr. Maserejian's most billed Medicare services were hospital inpatient care (99232), hospital inpatient care (99233) and hospital inpatient care (99239).
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Where did Dr. James Maserejian go to medical school?
Dr. Maserejian graduated from University of Massachusetts Medical School in 1995.
What drugs does Dr. James Maserejian prescribe most?
In 2024 Medicare Part D data, Dr. Maserejian's most prescribed drugs by claims were Pantoprazole Sodium, Cephalexin and Atorvastatin Calcium.
Has Dr. James Maserejian received payments from drug or device companies?
CMS Open Payments shows $1,959 in general payments to Dr. Maserejian from 22 companies from 2016 to 2022. The largest total came from Janssen Pharmaceuticals, Inc.
How long has Dr. James Maserejian been practicing?
Dr. Maserejian graduated from medical school in 1995, 31 years ago.
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