Dr. John Markus Rieth, MD
- Medicare services, 2024
- 354
- Medicare patients, 2024
- 135
- Part D claims, 2024
- 282
- MIPS score, 2024
- 80
- Hospital affiliations
- 4
- Practice address
- 200 Hawkins Drive, Iowa City, IA 52242
- Practice phone
- Call (319) 356-1616
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Find Dr. Rieth'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. John Markus Rieth is a medical oncologist in Iowa City, Iowa
Dr. Rieth practices at University of Iowa Health Care Medical Center in Iowa City, Iowa, part of The University of Iowa.
Dr. Rieth's NPI, 1528559937, was assigned on May 21, 2018. Dr. Rieth graduated from Indiana University School of Medicine in 2018. Dr. Rieth holds Iowa license MD-48661.
- NPI
- 1528559937NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3971852419
- NPI enumeration date
- May 21, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (319) 356-1616
- 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. John Markus Rieth practices at University of Iowa Health Care Medical Center in Iowa City, Iowa
Dr. Rieth's primary practice is University of Iowa Health Care Medical Center, at 200 Hawkins Drive, Iowa City, IA 52242 in Johnson County. The practice phone is (319) 356-1616.
- University of Iowa Health Care Medical Center200 Hawkins Drive, Iowa City, IA 52242 · Johnson CountyPhone(319) 356-1616
Source: Dmand AI Affiliation Data
Dr. John Markus Rieth is affiliated with 4 sites of care and 1 medical group
Dr. Rieth's primary practice is University of Iowa Health Care Medical Center in Iowa City, Iowa, part of The University of Iowa. Dr. Rieth is also affiliated with University of Iowa Health Care Medical Center Downtown. The medical group on file is Scanlan Center for School Mental Health Clinic. Dmand AI also links Dr. Rieth to 2 more hospitals, 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. John Markus Rieth's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Rieth practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| University of Iowa Health Care Medical Center | 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. John Markus Rieth is one of 55 medical oncologists in Iowa
Medical oncology is Dr. Rieth's primary specialty in the NPI Registry, under taxonomy code 207RX0202X. Dr. Rieth is licensed in Iowa.
Specialties and state licenses
- Medical oncology, IowaPrimary
Medical oncologists near Dr. Rieth
Counts of medical 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. John Markus Rieth billed Medicare for 354 services in 2024
CMS data shows 354 Medicare services from Dr. Rieth across 7 procedure codes in 2024, for 135 Medicare patients. Medicare paid $22,384 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Rieth's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1542024: 312103%
- Other services
- 2023: 02024: 42
Dr. Rieth compared with the Iowa median for medical oncologists, 2024
- Dr. Rieth
- Iowa median
- Medicare services
- 354vs 89861% below
- Medicare patients
- 135vs 45470% below
- Part D claims
- 161vs 71678% below
Medians across 49 medical oncologists in Iowa with Dmand AI profiles that report each measure.
Dr. Rieth'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. John Markus Rieth treated 135 Medicare patients in 2024, average age 72
CMS counts 135 Medicare patients who saw Dr. Rieth in 2024. The largest group is 65 to 74, with 59 patients. 75% of them have high blood pressure, and 70% have high cholesterol. 12% are also on Medicaid. Their average risk score is 2.09, 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. Rieth's median patient age at 71, with 51% women.
Dr. Rieth's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Rieth's Medicare patients by sex, 2024
- Women7052%
- Men6548%
Chronic conditions among Dr. Rieth's Medicare patients, 2024
- High blood pressure75%
- High cholesterol70%
- Cancer46%
- Arthritis39%
- Chronic kidney disease39%
- Diabetes33%
- Mood disorders33%
- Anxiety30%
Share of Medicare patients with each condition. A patient can have several.
Dr. Rieth's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women51%
- Men49%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. John Markus Rieth wrote 282 Medicare Part D claims in 2024
In 2024, Dr. Rieth wrote 282 Medicare Part D claims for 53 patients. 86% of them were for generic drugs. CMS names the drug for 161 of them, across 6 drugs with 11 or more claims each, at $20,902 in total drug cost. In 2023, CMS named 63 claims across 4 drugs.
Dr. Rieth's Part D claims by kind of drug, 2024
- Generic242 claims86%
- Brand-name40 claims14%
Dr. Rieth'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. Rieth's Part D claims, 2024
- Opioids8%22 of 282 claims
- Antibiotics8%23 of 282 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: 632024: 161156%
Drugs named by CMS: 6 in 2024, 4 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. John Markus Rieth scored 80 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 80 out of 100 for Dr. Rieth for performance year 2024, reported as part of a group. Dr. Rieth accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Rieth as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Rieth's MIPS scores, performance year 2024
- 80of 100Final score
- 75.7of 100Quality
- 78of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. John Markus Rieth received $11,296 in industry payments from 2023 to 2025
CMS Open Payments shows 26 general payments to Dr. Rieth from 2 drug and device companies from 2023 to 2025. Honoraria make up the largest share, 72% of the total. Deciphera Pharmaceuticals Inc. paid the most, $11,134. It also lists 1 research payment totaling $284 in 2025.
General payments to Dr. Rieth by program year, 2023 to 2025
General payments to Dr. Rieth by kind, 2023 to 2025
- Honoraria$8,17072%
- Travel and lodging$2,09719%
- Food and beverage$1,0299%
Companies that paid Dr. Rieth 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. John Markus Rieth graduated from Indiana University School of Medicine
Dr. Rieth graduated from Indiana University School of Medicine in 2018.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Markus Rieth'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)Clinician Public Reporting: Overall MIPS Performance (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. John Markus Rieth
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. John Markus Rieth's NPI number?
Dr. John Markus Rieth's NPI number is 1528559937. It was assigned on May 21, 2018, and it is active in the NPI Registry.
What kind of doctor is Dr. John Markus Rieth?
Dr. John Markus Rieth is a medical oncologist in Iowa City, Iowa. The primary specialty in the NPI Registry is Medical Oncology Physician (taxonomy code 207RX0202X).
Where does Dr. John Markus Rieth practice?
Dr. Rieth practices at 200 Hawkins Drive, Iowa City, IA 52242. Dr. Rieth's primary practice is University of Iowa Health Care Medical Center in Iowa City, Iowa, part of The University of Iowa. Dmand AI also links Dr. Rieth to 2 hospitals.
What is Dr. John Markus Rieth's office phone number?
The practice phone on file for Dr. Rieth is (319) 356-1616.
What is Dr. John Markus Rieth's medical license number?
Dr. Rieth holds Iowa license MD-48661.
Which hospitals is Dr. John Markus Rieth affiliated with?
Dr. Rieth practices at University of Iowa Health Care Medical Center in Iowa City, Iowa. Dr. Rieth is also affiliated with University of Iowa Health Care Medical Center Downtown. Dmand AI links Dr. Rieth to 2 more hospitals.
What medical group is Dr. John Markus Rieth part of?
Dr. Rieth is linked to Scanlan Center for School Mental Health Clinic.
Does Dr. John Markus Rieth accept Medicare?
Yes. CMS data shows Dr. Rieth billed Medicare for 354 services in 2024, and Dr. Rieth accepts Medicare assignment.
Does Dr. John Markus Rieth offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Rieth as offering telehealth services.
What is Dr. John Markus Rieth's MIPS score?
Dr. Rieth's MIPS final score for performance year 2024 is 80 out of 100, reported as part of a group.
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How many Medicare patients does Dr. John Markus Rieth see?
CMS counts 135 Medicare patients who saw Dr. Rieth in 2024, with an average age of 72.
What services does Dr. John Markus Rieth bill to Medicare?
In 2024, Dr. Rieth's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and medicare service (G2211).
Where did Dr. John Markus Rieth go to medical school?
Dr. Rieth graduated from Indiana University School of Medicine in 2018.
What drugs does Dr. John Markus Rieth prescribe most?
In 2024 Medicare Part D data, Dr. Rieth's most prescribed drugs by claims were Imatinib Mesylate, Ondansetron HCl and Levothyroxine Sodium.
Has Dr. John Markus Rieth received payments from drug or device companies?
CMS Open Payments shows $11,296 in general payments to Dr. Rieth from 2 companies from 2023 to 2025. The largest total came from Deciphera Pharmaceuticals Inc.
How long has Dr. John Markus Rieth been practicing?
Dr. Rieth graduated from medical school in 2018, 8 years ago.
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