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Dr. Martin T. Grune

Urology (Urology Physician)

400 E 3rd St
Duluth, MN 55805

Who else practices at this address →

St. Louis County includes primary care (17% of residents) and dental (35% of residents) shortage areas. About shortage areas

Call (218) 786-8364

  • Medicare participating

At a glance

In the NPI registry since
2006
Medicare patients seen, 2024
104

The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. NPIs were first issued in May 2005 and became required on claims in 2007–2008, so an early date usually means the clinician was already in practice before then. What an NPI is

Education and training

  • 2006Registered with an NPI (national billing number; not a license date) — NPIs began in 2005, so practice likely started earlier

Medicare’s Care Compare data doesn’t list this clinician’s medical school. Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).

Specialties and state licenses

  • Urology Physician primary
    MN license 39996

As reported to the NPI registry. To confirm a license is current, check the state medical board.

Map: Urology per capita by county →

Medicare patients and services

Medicare patients, 2024
104
Services billed
184
Patients’ average age
72
Most frequent Medicare services, 2023
ServiceTimesPatients
Diagnostic exam of bladder and urethra using an endoscope4036
Established patient office or other outpatient visit, 20-29 minutes3635
New patient office or other outpatient visit, 30-44 minutes2626
Established patient office or other outpatient visit, 30-39 minutes2018
Crushing of stone of ureter with insertion of stent using an endoscope1614
Electronic assessment of bladder emptying1312
Biopsy of prostate gland1212
Ultrasonic guidance for needle placement1212
Established patient office or other outpatient visit, 10-19 minutes1111
Simple removal of foreign body, stone, or stent in urethra or bladder using an endoscope1111

Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.

Medicare prescriptions

Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.

Other Urology clinicians in Duluth

Sources

NPI registry (CMS NPPES, November 2026; record last updated May 10, 2011), Medicare Care Compare, Medicare Physician & Other Practitioners (2024), Medicare Part D Prescribers (2024) and Open Payments (2025). Information is self-reported or billed data and may be out of date; call before visiting.

NPI 1760411565. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.