Dr. James L. Leenstra, MD
- Medicare services, 2024
- 1,931
- Medicare patients, 2024
- 139
- Part D claims, 2024
- 136
- Hospital affiliations
- 5
- Medical groups
- 4
- Practice address
- 200 First Street SW, Rochester, MN 55905
- Practice phone
- Call (507) 284-5968
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mayo Clinic Breast Diagnostic Clinic
Mammography / Breast Imaging Center · Rochester, Minnesota
Find Dr. Leenstra'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 L. Leenstra is a radiation oncologist in Rochester, Minnesota
Dr. Leenstra practices at Mayo Clinic Breast Diagnostic Clinic in Rochester, Minnesota.
Dr. Leenstra's NPI, 1174593982, was assigned on January 24, 2006. Dr. Leenstra graduated from University of Oklahoma College of Medicine in 2002. Dr. Leenstra holds Minnesota license 45776.
- NPI
- 1174593982NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4284649120
- NPI enumeration date
- January 24, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (507) 284-5968
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James L. Leenstra practices at Mayo Clinic Breast Diagnostic Clinic in Rochester, Minnesota
Dr. Leenstra's primary practice is Mayo Clinic Breast Diagnostic Clinic, at 200 First Street SW, Rochester, MN 55905. The practice phone is (507) 284-5968.
- Mayo Clinic Breast Diagnostic Clinic200 First Street SW, Rochester, MN 55905Phone(507) 284-5968
Source: Dmand AI Affiliation Data
Dr. James L. Leenstra is affiliated with 8 sites of care and 4 medical groups
Dr. Leenstra's primary practice is Mayo Clinic Breast Diagnostic Clinic in Rochester, Minnesota. Dr. Leenstra is also affiliated with Mayo Clinic Hospital, Saint Marys Campus. The medical group on file is Mayo Clinic. Dmand AI also links Dr. Leenstra to 4 more hospitals, 3 medical groups, 1 clinical lab and 1 hospice, each named with a free account. Dr. Leenstra's employer is on file too: a breast imaging center.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James L. Leenstra's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Leenstra practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mayo Clinic Breast Diagnostic Clinic | Available with a free account |
| +7 more sites and 3 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. James L. Leenstra is one of 148 radiation oncologists in Minnesota
Radiation oncology is Dr. Leenstra's primary specialty in the NPI Registry, under taxonomy code 2085R0001X. Dmand AI has Dr. Leenstra's licenses on file in 2 states: Minnesota and Wisconsin.
Specialties and state licenses
- Radiation oncology, MinnesotaPrimary
- Wisconsin license
Radiation oncologists near Dr. Leenstra
Counts of radiation 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. James L. Leenstra billed Medicare for 1,931 services in 2024
CMS data shows 1,931 Medicare services from Dr. Leenstra across 12 procedure codes in 2024, for 139 Medicare patients. Medicare paid $385,087 for them. Every service was in an office.
Dr. Leenstra's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 1,4012024: 1,15717%
- Imaging
- 2023: 8212024: 7746%
Dr. Leenstra compared with the Minnesota median for radiation oncologists, 2024
- Dr. Leenstra
- Minnesota median
- Medicare services
- 1,931vs 9212.1 times
- Medicare patients
- 139vs 12610% above
- Part D claims
- 55vs 2990% above
Medians across 140 radiation oncologists in Minnesota with Dmand AI profiles that report each measure.
Dr. Leenstra'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. James L. Leenstra treated 139 Medicare patients in 2024, average age 75
CMS counts 139 Medicare patients who saw Dr. Leenstra in 2024. The largest group is 65 to 74, with 69 patients. 75% of them have cancer, and 71% have high cholesterol. Their average risk score is 1.44, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Leenstra's median patient age at 73, with 34% women.
Dr. Leenstra's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Leenstra's Medicare patients by sex, 2024
- Women3928%
- Men10072%
Chronic conditions among Dr. Leenstra's Medicare patients, 2024
- Cancer75%
- High cholesterol71%
- High blood pressure68%
- Arthritis32%
- Ischemic heart disease27%
- Chronic kidney disease22%
- Anxiety21%
- Diabetes21%
Share of Medicare patients with each condition. A patient can have several.
Dr. Leenstra's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women34%
- Men65%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. James L. Leenstra wrote 136 Medicare Part D claims in 2024
In 2024, Dr. Leenstra wrote 136 Medicare Part D claims for 57 patients. 99% of them were for generic drugs. CMS names the drug for 55 of them, across 2 drugs with 11 or more claims each, at $368 in total drug cost. In 2023, CMS named 30 claims across 1 drug.
Dr. Leenstra's Part D claims by kind of drug, 2024
- Generic134 claims99%
- Brand-name and other2 claims1%
Dr. Leenstra'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. Leenstra's Part D claims, 2024
- Opioids13%17 of 136 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: 302024: 5583%
Drugs named by CMS: 2 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
Dr. James L. Leenstra offers telehealth to Medicare patients
Dr. Leenstra accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Leenstra as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. James L. Leenstra graduated from University of Oklahoma College of Medicine
Dr. Leenstra graduated from University of Oklahoma College of Medicine in 2002.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. James L. Leenstra'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) |
| 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 L. Leenstra
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 L. Leenstra's NPI number?
Dr. James L. Leenstra's NPI number is 1174593982. It was assigned on January 24, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. James L. Leenstra?
Dr. James L. Leenstra is a radiation oncologist in Rochester, Minnesota. The primary specialty in the NPI Registry is Radiation Oncology Physician (taxonomy code 2085R0001X).
Where does Dr. James L. Leenstra practice?
Dr. Leenstra practices at 200 First Street SW, Rochester, MN 55905. Dr. Leenstra's primary practice is Mayo Clinic Breast Diagnostic Clinic in Rochester, Minnesota. Dmand AI also links Dr. Leenstra to 4 hospitals, 3 medical groups, 1 clinical lab and 1 hospice.
What is Dr. James L. Leenstra's office phone number?
The practice phone on file for Dr. Leenstra is (507) 284-5968.
What is Dr. James L. Leenstra's medical license number?
Dr. Leenstra holds Minnesota license 45776, one of the licenses on file in 2 states.
Which states has Dr. James L. Leenstra been licensed in?
Dmand AI has state licenses on file for Dr. Leenstra in Minnesota and Wisconsin.
Which hospitals is Dr. James L. Leenstra affiliated with?
Dr. Leenstra is affiliated with Mayo Clinic Hospital, Saint Marys Campus. Dmand AI links Dr. Leenstra to 4 more hospitals.
What medical group is Dr. James L. Leenstra part of?
Dr. Leenstra is linked to Mayo Clinic. Dmand AI links Dr. Leenstra to 3 more medical groups.
Does Dr. James L. Leenstra accept Medicare?
Yes. CMS data shows Dr. Leenstra billed Medicare for 1,931 services in 2024, and Dr. Leenstra accepts Medicare assignment.
Does Dr. James L. Leenstra offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Leenstra as offering telehealth services.
Show 5 more questionsShow fewer questions
How many Medicare patients does Dr. James L. Leenstra see?
CMS counts 139 Medicare patients who saw Dr. Leenstra in 2024, with an average age of 75.
What services does Dr. James L. Leenstra bill to Medicare?
In 2024, Dr. Leenstra's most billed Medicare services were medicare service (G6002), medicare service (G6015) and radiation oncology (77300).
Where did Dr. James L. Leenstra go to medical school?
Dr. Leenstra graduated from University of Oklahoma College of Medicine in 2002.
What drugs does Dr. James L. Leenstra prescribe most?
In 2024 Medicare Part D data, Dr. Leenstra's most prescribed drugs by claims were Tamsulosin HCl and Dexamethasone.
How long has Dr. James L. Leenstra been practicing?
Dr. Leenstra graduated from medical school in 2002, 24 years ago.
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