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Dr. John S. Thurlow, M.D.

Nephrology (Kidney) (Nephrology Physician)

  • Medicare participating

At a glance

Years since graduation
18
In the NPI registry since
2008
Medicare patients seen, 2024
358

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

  • 2008Registered 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

  • Nephrology Physician primary
    WI license 53790-20

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

Map: Nephrology (Kidney) per capita by county →

Where they work

Hospitals

Medical groups

Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.

Medicare patients and services

Medicare patients, 2024
358
Services billed
1,382
Patients’ average age
72
Most frequent Medicare services, 2023
ServiceTimesPatients
Insertion of needle into vein for collection of blood sample285186
Creatinine level to test for kidney function or muscle injury24882
Established patient office or other outpatient visit, 30-39 minutes203146
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count185147
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes15270
Manual urinalysis test with examination using microscope, automated128114
Vitamin d-3 level9690
Dialysis services, 4 or more physician visits per month (20 years or older)9516
New patient office or other outpatient visit, 45-59 minutes9292
Urine microalbumin (protein) level8681

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 Nephrology (Kidney) clinicians in Bethesda

Sources

NPI registry (CMS NPPES, November 2026; record last updated January 17, 2024), 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 1740441237. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.