Dr. Kellen J. Mastick, MD
- Medicare services, 2024
- 524
- Medicare patients, 2024
- 178
- Part D claims, 2024
- 106
- Hospital affiliations
- 2
- Medical group
- 1
- Practice address
- 615 N Michigan St, South Bend, IN 46601
- Practice phone
- Call (574) 647-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Mastick's professional email, personal email and mobile number
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Dr. Kellen J. Mastick is an internist in South Bend, Indiana
Dr. Mastick practices at Memorial Hospital of South Bend in South Bend, Indiana, part of Beacon Health System.
Dr. Mastick's NPI, 1538655709, was assigned on July 10, 2018. Dr. Mastick holds Indiana license 01087004A.
- NPI
- 1538655709NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739564014
- NPI enumeration date
- July 10, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (574) 647-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 34
- Medical school graduation
- 2018
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Kellen J. Mastick practices at Memorial Hospital of South Bend in South Bend, Indiana
Dr. Mastick's primary practice is Memorial Hospital of South Bend, at 615 N Michigan St, South Bend, IN 46601 in St. Joseph County. The practice phone is (574) 647-1000.
- Memorial Hospital of South Bend615 N Michigan St, South Bend, IN 46601 · St. Joseph CountyPhone(574) 647-1000
Source: Dmand AI Affiliation Data
Dr. Kellen J. Mastick is affiliated with 2 sites of care and 1 medical group
Dr. Mastick's primary practice is Memorial Hospital of South Bend in South Bend, Indiana, part of Beacon Health System. The medical group on file is Beacon Medical Group Schwartz-Wiekamp. Dmand AI also links Dr. Mastick to 1 more hospital, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Kellen J. Mastick's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mastick practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Memorial Hospital of South Bend | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Kellen J. Mastick is one of 1,987 internists in Indiana
Internal medicine is Dr. Mastick's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dmand AI has Dr. Mastick's licenses on file in 2 states: Indiana and North Dakota.
Specialties and state licenses
- Internal medicine, IndianaPrimary
- North Dakota license
Internists near Dr. Mastick
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. Kellen J. Mastick billed Medicare for 524 services in 2024
CMS data shows 524 Medicare services from Dr. Mastick across 4 procedure codes in 2024, for 178 Medicare patients. Medicare paid $42,591 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Mastick's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3512024: 52449%
Dr. Mastick compared with the Indiana median for internists, 2024
- Dr. Mastick
- Indiana median
- Medicare services
- 524vs 520Close to median
- Medicare patients
- 178vs 21216% below
Medians across 1,948 internists in Indiana with Dmand AI profiles that report each measure.
Dr. Mastick'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. Mastick and other internists in Indiana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Kellen J. Mastick treated 178 Medicare patients in 2024, average age 76
CMS counts 178 Medicare patients who saw Dr. Mastick in 2024. The largest group is 75 to 84, with 69 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 19% are also on Medicaid. Their average risk score is 1.91, 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. Mastick's median patient age at 76, with 54% women.
Dr. Mastick's Medicare patients by age, 2024
Dr. Mastick's Medicare patients by sex, 2024
- Women8849%
- Men9051%
Chronic conditions among Dr. Mastick's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis51%
- Chronic kidney disease43%
- Atrial fibrillation41%
- Ischemic heart disease40%
- Diabetes39%
- Heart failure38%
Share of Medicare patients with each condition. A patient can have several.
Dr. Mastick'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
- Women54%
- Men46%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Kellen J. Mastick wrote 106 Medicare Part D claims in 2024
In 2024, Dr. Mastick wrote 106 Medicare Part D claims for 53 patients. 93% of them were for generic drugs.
Dr. Mastick's Part D claims by kind of drug, 2024
- Generic99 claims93%
- Brand-name and other7 claims7%
Drug classes CMS tracks in Dr. Mastick's Part D claims, 2024
- Antibiotics23%24 of 106 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Kellen J. Mastick takes part in Medicare
Dr. Mastick 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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Sources for Dr. Kellen J. Mastick'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 (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) |
| 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. Kellen J. Mastick
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. Kellen J. Mastick's NPI number?
Dr. Kellen J. Mastick's NPI number is 1538655709. It was assigned on July 10, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. Kellen J. Mastick?
Dr. Kellen J. Mastick is an internist in South Bend, Indiana. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Kellen J. Mastick practice?
Dr. Mastick practices at 615 N Michigan St, South Bend, IN 46601. Dr. Mastick's primary practice is Memorial Hospital of South Bend in South Bend, Indiana, part of Beacon Health System. Dmand AI also links Dr. Mastick to 1 hospital.
What is Dr. Kellen J. Mastick's office phone number?
The practice phone on file for Dr. Mastick is (574) 647-1000.
What is Dr. Kellen J. Mastick's medical license number?
Dr. Mastick holds Indiana license 01087004A, one of the licenses on file in 2 states.
Which states has Dr. Kellen J. Mastick been licensed in?
Dmand AI has state licenses on file for Dr. Mastick in Indiana and North Dakota.
Which hospitals is Dr. Kellen J. Mastick affiliated with?
Dr. Mastick practices at Memorial Hospital of South Bend in South Bend, Indiana. Dmand AI links Dr. Mastick to 1 more hospital.
What medical group is Dr. Kellen J. Mastick part of?
Dr. Mastick is linked to Beacon Medical Group Schwartz-Wiekamp.
Does Dr. Kellen J. Mastick accept Medicare?
Yes. CMS data shows Dr. Mastick billed Medicare for 524 services in 2024, and Dr. Mastick accepts Medicare assignment.
How many Medicare patients does Dr. Kellen J. Mastick see?
CMS counts 178 Medicare patients who saw Dr. Mastick in 2024, with an average age of 76.
What services does Dr. Kellen J. Mastick bill to Medicare?
In 2024, Dr. Mastick's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99232) and hospital inpatient care (99239).
How long has Dr. Kellen J. Mastick been practicing?
Dr. Mastick graduated from medical school in 2018, 8 years ago.
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