Dr. Marlo F. Leonen, MD

  • Ann Arbor, MI
  • Cardiologist
NPI1003883539PAC ID7618860255
Medicare services, 2024
5,276
Medicare patients, 2024
2,943
Part D claims, 2024
4,828
Clinical trials
2
Hospital affiliations
5
Practice address
5301 E Huron River Dr, Ann Arbor, MI 48105
Practice phone
Call (734) 712-3456
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Trinity Health Ann Arbor

Ann Arbor, Michigan

See all 8 affiliations

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Dr. Marlo F. Leonen is a cardiologist in Ann Arbor, Michigan

Dr. Leonen practices at Trinity Health Ann Arbor in Ann Arbor, Michigan.

Dr. Leonen's NPI, 1003883539, was assigned on March 3, 2006. Dr. Leonen holds Michigan license 4301059106.

NPI and contact details
Medicare PAC ID
7618860255
NPI enumeration date
March 3, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(734) 712-3456
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
65
Medical school graduation
1987

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Marlo F. Leonen practices at Trinity Health Ann Arbor in Ann Arbor, Michigan

Dr. Leonen's primary practice is Trinity Health Ann Arbor, at 5301 E Huron River Dr, Ann Arbor, MI 48105 in Washtenaw County. The practice phone is (734) 712-3456.

  • Trinity Health Ann Arbor
    5301 E Huron River Dr, Ann Arbor, MI 48105 · Washtenaw CountyPhone(734) 712-3456

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Dr. Marlo F. Leonen is affiliated with 7 sites of care and 1 medical group

Dr. Leonen's primary practice is Trinity Health Ann Arbor in Ann Arbor, Michigan. Dr. Leonen is also affiliated with University Hospital. The medical group on file is Trinity Health IHA Medical Group. Dmand AI also links Dr. Leonen to 4 more hospitals and 1 group practice or clinic, each named with a free account.

See all 8 affiliations for Dr. Leonen

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Marlo F. Leonen's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leonen practices, 6 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Trinity Health Ann ArborAvailable with a free account
+6 more affiliated sitesAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Marlo F. Leonen is one of 768 cardiologists in Michigan

Cardiovascular disease is Dr. Leonen's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. Leonen is licensed in Michigan.

Specialties and state licenses

  • Cardiovascular disease, MichiganPrimaryLicense 4301059106 · taxonomy 207RC0000X

Cardiologists near Dr. Leonen

Counts of cardiologists 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. Marlo F. Leonen billed Medicare for 5,276 services in 2024

CMS data shows 5,276 Medicare services from Dr. Leonen across 29 procedure codes in 2024, for 2,943 Medicare patients. Medicare paid $127,108 for them.

Medicare services, 20245,276
Medicare patients2,943
Paid by Medicare$127,108
Procedure codes29

Dr. Leonen's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Tests and treatments
2023: 5,5782024: 4,41321%
Office and hospital visits
2023: 4682024: 51811%
Imaging
2023: 3362024: 30210%
Other services
2023: 02024: 43

Where Dr. Leonen's Medicare services took place, 2024

  • In an office65912%
  • In a facility4,61788%

Dr. Leonen compared with the Michigan median for cardiologists, 2024

  • Dr. Leonen
  • Michigan median
Medicare services
5,276vs 1,4353.7 times
Medicare patients
2,943vs 6444.6 times
Part D claims
4,671vs 1,5623.0 times

Medians across 749 cardiologists in Michigan with Dmand AI profiles that report each measure.

Dr. Leonen'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.

See all procedures by Dr. Leonen

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Marlo F. Leonen treated 2,943 Medicare patients in 2024, average age 75

CMS counts 2,943 Medicare patients who saw Dr. Leonen in 2024. The largest group is 65 to 74, with 1,083 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 16% are also on Medicaid. Their average risk score is 1.78, 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. Leonen's median patient age at 71, with 52% women.

Medicare patients, 20242,943
Average age75
Average risk score1.78
Also on Medicaid16%

Dr. Leonen's Medicare patients by age, 2024

Dr. Leonen's Medicare patients by sex, 2024

  • Women1,60154%
  • Men1,34246%

Chronic conditions among Dr. Leonen's Medicare patients, 2024

  1. High blood pressure75%
  2. High cholesterol75%
  3. Ischemic heart disease53%
  4. Arthritis50%
  5. Atrial fibrillation39%
  6. Chronic kidney disease39%
  7. Heart failure39%
  8. Diabetes37%

Share of Medicare patients with each condition. A patient can have several.

Dr. Leonen'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

  • Women52%
  • Men48%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Marlo F. Leonen wrote 4,828 Medicare Part D claims in 2024

In 2024, Dr. Leonen wrote 4,828 Medicare Part D claims for 606 patients. 73% of them were for generic drugs. CMS names the drug for 4,671 of them, across 40 drugs with 11 or more claims each, at $2,787,969 in total drug cost. In 2023, CMS named 3,986 claims across 37 drugs.

Part D claims, 20244,828
Drugs named by CMS40
Total drug cost$2.8M
Part D patients606

Dr. Leonen's Part D claims by kind of drug, 2024

  • Generic3,521 claims73%
  • Brand-name and other1,307 claims27%

Dr. Leonen'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. Leonen's Part D claims, 2024

  • Antibiotics0%15 of 4,828 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: 3,9862024: 4,67117%

Drugs named by CMS: 40 in 2024, 37 in 2023.

See all prescribing by Dr. Leonen

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. Marlo F. Leonen takes part in Medicare

Dr. Leonen 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. Marlo F. Leonen has worked on 2 clinical trials

Dmand AI links Dr. Leonen to 2 clinical trials, 2 of them phase 3 studies. Conditions studied include Heart Failure, Heart Failure, Systolic and Heart Diseases.

Conditions in Dr. Leonen's trials

  • Heart Failure
  • Heart Failure, Systolic
  • Heart Diseases

Investigators on the most trials with Dr. Leonen

Recent clinical trials with Dr. Leonen

Sources: ClinicalTrials.gov (National Library of Medicine); and Dmand AI Research Linkage

Dr. Marlo F. Leonen received $4,992 in industry payments from 2016 to 2025

CMS Open Payments shows 77 general payments to Dr. Leonen from 18 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 80% of the total. Abbott Laboratories paid the most, $1,860.

General payments to Dr. Leonen by program year, 2016 to 2025

General payments to Dr. Leonen by kind, 2016 to 2025

$5Kin total
  • Food and beverage$4,00980%
  • Travel and lodging$98320%

Companies that paid Dr. Leonen the most, 2016 to 2025

Share is of all general payments to this clinician.

See all payments to Dr. Leonen

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Sources for Dr. Marlo F. Leonen's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Clinical trials and co-investigatorsClinicalTrials.gov (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Marlo F. Leonen

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. Marlo F. Leonen's NPI number?

Dr. Marlo F. Leonen's NPI number is 1003883539. It was assigned on March 3, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Marlo F. Leonen?

Dr. Marlo F. Leonen is a cardiologist in Ann Arbor, Michigan. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).

Where does Dr. Marlo F. Leonen practice?

Dr. Leonen practices at 5301 E Huron River Dr, Ann Arbor, MI 48105. Dr. Leonen's primary practice is Trinity Health Ann Arbor in Ann Arbor, Michigan. Dmand AI also links Dr. Leonen to 4 hospitals and 1 group practice or clinic.

What is Dr. Marlo F. Leonen's office phone number?

The practice phone on file for Dr. Leonen is (734) 712-3456.

What is Dr. Marlo F. Leonen's medical license number?

Dr. Leonen holds Michigan license 4301059106.

Which hospitals is Dr. Marlo F. Leonen affiliated with?

Dr. Leonen is affiliated with University Hospital. Dmand AI links Dr. Leonen to 4 more hospitals.

What medical group is Dr. Marlo F. Leonen part of?

Dr. Leonen is linked to Trinity Health IHA Medical Group.

Does Dr. Marlo F. Leonen accept Medicare?

Yes. CMS data shows Dr. Leonen billed Medicare for 5,276 services in 2024, and Dr. Leonen accepts Medicare assignment.

How many Medicare patients does Dr. Marlo F. Leonen see?

CMS counts 2,943 Medicare patients who saw Dr. Leonen in 2024, with an average age of 75.

What services does Dr. Marlo F. Leonen bill to Medicare?

In 2024, Dr. Leonen's most billed Medicare services were heart test or procedure (93010), heart test or procedure (93306) and heart test or procedure (93356).

Show 4 more questionsShow fewer questions

What drugs does Dr. Marlo F. Leonen prescribe most?

In 2024 Medicare Part D data, Dr. Leonen's most prescribed drugs by claims were Spironolactone, Eliquis and Atorvastatin Calcium.

Has Dr. Marlo F. Leonen received payments from drug or device companies?

CMS Open Payments shows $4,992 in general payments to Dr. Leonen from 18 companies from 2016 to 2025. The largest total came from Abbott Laboratories.

How long has Dr. Marlo F. Leonen been practicing?

Dr. Leonen graduated from medical school in 1987, 39 years ago.

Does Dr. Marlo F. Leonen do research?

Dr. Leonen has worked on 2 clinical trials.

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