Dr. Matthew James Koster, MD
- Medicare services, 2024
- 4,833
- Medicare patients, 2024
- 292
- Part D claims, 2024
- 400
- Hospital affiliations
- 5
- Industry payments
- $5,842
- Practice address
- 1216 Second Street Southwest, Rochester, MN 55902
- Practice phone
- Call (507) 255-5123
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Koster's professional email, personal email and mobile number
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Dr. Matthew James Koster is a rheumatologist in Rochester, Minnesota
Dr. Koster practices at Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota, part of Mayo Clinic.
Dr. Koster's NPI, 1588891469, was assigned on June 17, 2009. Dr. Koster graduated from Loyola University of Chicago, Stritch School of Medicine in 2009. Dr. Koster holds Minnesota license 56961.
- NPI
- 1588891469NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1951542141
- NPI enumeration date
- June 17, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (507) 255-5123
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Matthew James Koster practices at Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota
Dr. Koster's primary practice is Mayo Clinic Hospital, Saint Marys Campus, at 1216 Second Street Southwest, Rochester, MN 55902 in Olmsted County. The practice phone is (507) 255-5123.
- Mayo Clinic Hospital, Saint Marys Campus1216 Second Street Southwest, Rochester, MN 55902 · Olmsted CountyPhone(507) 255-5123
Source: Dmand AI Affiliation Data
Dr. Matthew James Koster is affiliated with 6 sites of care and 1 medical group
Dr. Koster's primary practice is Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota, part of Mayo Clinic. Dr. Koster is also affiliated with Mayo Clinic Health System in Mankato. The medical group on file is Mayo Clinic. Dmand AI also links Dr. Koster to 3 more hospitals and 1 hospice, 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. Matthew James Koster's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Koster practices, 6 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mayo Clinic Hospital, Saint Marys Campus | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Matthew James Koster is one of 136 rheumatologists in Minnesota
Rheumatology is Dr. Koster's primary specialty in the NPI Registry, under taxonomy code 207RR0500X. Dmand AI has Dr. Koster's licenses on file in 2 states: Minnesota and Illinois.
Specialties and state licenses
- Rheumatology, MinnesotaPrimary
- Internal medicine, Illinois
Rheumatologists near Dr. Koster
Counts of rheumatologists 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. Matthew James Koster billed Medicare for 4,833 services in 2024
CMS data shows 4,833 Medicare services from Dr. Koster across 12 procedure codes in 2024, for 292 Medicare patients. Medicare paid $47,606 for them. Every service was in an office.
Dr. Koster's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Drugs given in the office
- 2023: 4622024: 4,337839%
- Office and hospital visits
- 2023: 2922024: 26011%
- Other services
- 2023: 892024: 12237%
- Surgery
- 2023: 942024: 11421%
Dr. Koster compared with the Minnesota median for rheumatologists, 2024
- Dr. Koster
- Minnesota median
- Medicare services
- 4,833vs 8315.8 times
- Medicare patients
- 292vs 17468% above
- Part D claims
- 322vs 71355% below
Medians across 142 rheumatologists in Minnesota with Dmand AI profiles that report each measure.
Dr. Koster'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. Koster and other rheumatologists in Minnesota.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Matthew James Koster treated 292 Medicare patients in 2024, average age 73
CMS counts 292 Medicare patients who saw Dr. Koster in 2024. The largest group is 65 to 74, with 150 patients. 70% of them have high cholesterol, and 67% have high blood pressure. 7% are also on Medicaid. Their average risk score is 1.65, 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. Koster's median patient age at 72, with 58% women.
Dr. Koster's Medicare patients by age, 2024
Dr. Koster's Medicare patients by sex, 2024
- Women16958%
- Men12342%
Chronic conditions among Dr. Koster's Medicare patients, 2024
- High cholesterol70%
- High blood pressure67%
- Arthritis65%
- Chronic kidney disease35%
- Ischemic heart disease29%
- Osteoporosis28%
- Mood disorders25%
- Depression24%
Share of Medicare patients with each condition. A patient can have several.
Dr. Koster's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 72
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. Matthew James Koster wrote 400 Medicare Part D claims in 2024
In 2024, Dr. Koster wrote 400 Medicare Part D claims for 95 patients. 84% of them were for generic drugs. CMS names the drug for 322 of them, across 10 drugs with 11 or more claims each, at $332,148 in total drug cost. In 2023, CMS named 301 claims across 8 drugs.
Dr. Koster's Part D claims by kind of drug, 2024
- Generic336 claims84%
- Brand-name64 claims16%
Dr. Koster'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. Koster's Part D claims, 2024
- Antibiotics8%31 of 400 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: 3012024: 3227%
Drugs named by CMS: 10 in 2024, 8 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
Dr. Matthew James Koster offers telehealth to Medicare patients
Dr. Koster accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Koster as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Matthew James Koster received $5,842 in industry payments from 2023 to 2025
CMS Open Payments shows 7 general payments to Dr. Koster from 2 drug and device companies from 2023 to 2025. Consulting fees make up the largest share, 99% of the total. Amgen Inc. paid the most, $3,394. It also lists 9 research payments totaling $5,108 from 2016 to 2025.
General payments to Dr. Koster by program year, 2023 to 2025
General payments to Dr. Koster by kind, 2023 to 2025
- Consulting fees$5,79499%
- Food and beverage$481%
Companies that paid Dr. Koster the most, 2023 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Matthew James Koster graduated from Loyola University of Chicago, Stritch School of Medicine
Dr. Koster graduated from Loyola University of Chicago, Stritch School of Medicine in 2009.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Matthew James Koster'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) |
| 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. Matthew James Koster
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. Matthew James Koster's NPI number?
Dr. Matthew James Koster's NPI number is 1588891469. It was assigned on June 17, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Matthew James Koster?
Dr. Matthew James Koster is a rheumatologist in Rochester, Minnesota. The primary specialty in the NPI Registry is Rheumatology Physician (taxonomy code 207RR0500X).
Where does Dr. Matthew James Koster practice?
Dr. Koster practices at 1216 Second Street Southwest, Rochester, MN 55902. Dr. Koster's primary practice is Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota, part of Mayo Clinic. Dmand AI also links Dr. Koster to 3 hospitals and 1 hospice.
What is Dr. Matthew James Koster's office phone number?
The practice phone on file for Dr. Koster is (507) 255-5123.
What is Dr. Matthew James Koster's medical license number?
Dr. Koster holds Minnesota license 56961, one of the licenses on file in 2 states.
Which states has Dr. Matthew James Koster been licensed in?
Dmand AI has state licenses on file for Dr. Koster in Minnesota and Illinois.
Which hospitals is Dr. Matthew James Koster affiliated with?
Dr. Koster practices at Mayo Clinic Hospital, Saint Marys Campus in Rochester, Minnesota. Dr. Koster is also affiliated with Mayo Clinic Health System in Mankato. Dmand AI links Dr. Koster to 3 more hospitals.
What medical group is Dr. Matthew James Koster part of?
Dr. Koster is linked to Mayo Clinic.
Does Dr. Matthew James Koster accept Medicare?
Yes. CMS data shows Dr. Koster billed Medicare for 4,833 services in 2024, and Dr. Koster accepts Medicare assignment.
Does Dr. Matthew James Koster offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Koster as offering telehealth services.
Show 6 more questionsShow fewer questions
How many Medicare patients does Dr. Matthew James Koster see?
CMS counts 292 Medicare patients who saw Dr. Koster in 2024, with an average age of 73.
What services does Dr. Matthew James Koster bill to Medicare?
In 2024, Dr. Koster's most billed Medicare services were injected or infused drug (J1010), injected or infused drug (J3301) and office visit, established patient (99215).
Where did Dr. Matthew James Koster go to medical school?
Dr. Koster graduated from Loyola University of Chicago, Stritch School of Medicine in 2009.
What drugs does Dr. Matthew James Koster prescribe most?
In 2024 Medicare Part D data, Dr. Koster's most prescribed drugs by claims were Prednisone, Alendronate Sodium and Sulfamethoxazole-Trimethoprim.
Has Dr. Matthew James Koster received payments from drug or device companies?
CMS Open Payments shows $5,842 in general payments to Dr. Koster from 2 companies from 2023 to 2025. The largest total came from Amgen Inc.
How long has Dr. Matthew James Koster been practicing?
Dr. Koster graduated from medical school in 2009, 17 years ago.
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