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Dr. Peter Grubel, MD

Gastroenterology (Gastroenterology Physician)

  • Medicare participating

At a glance

Years since graduation
35
In the NPI registry since
2005
Medicare patients seen, 2024
319

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

  • 2005Registered 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

  • Gastroenterology Physician primary
    OR license MD213472 · FL license ME84033 · IA license MD-44630 · MI license 4301113746

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

Map: Gastroenterology 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
319
Services billed
467
Patients’ average age
75
Most frequent Medicare services, 2023
ServiceTimesPatients
Initial hospital care with straightforward or low level of medical decision making, per day, if using time, at least 40 minutes8279
Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope5353
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes5252
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope2828
Incision of pancreatic outlet using a flexible endoscope1616
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes1512
Diagnostic exam of large bowel using a flexible endoscope1515
Biopsy of large bowel using a flexible endoscope1212

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

Most prescribed drugs, Medicare Part D 2024
DrugPrescriptions
Sod Sulf-Potass Sulf-Mag Sulf (sodium, potassium,mag sulfates)
Other prescribers in Springfield, OR
16
Gavilyte-C (peg3350/sod sulf,bicarb,cl/kcl)
Other prescribers in Springfield, OR
11

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

Payments from drug and device companies

In 2025, 1 companies reported 1 payments worth $53.55 in total to this clinician.

By company
Pfizer Inc.$53.55
By type
Food and Beverage$53.55

From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.

Who received the most in Oregon →

Other Gastroenterology clinicians in Springfield

Sources

NPI registry (CMS NPPES, November 2026; record last updated April 28, 2023), 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 1376531335. Official NPI registry record (opens in a new tab). Clinicians can correct their information in NPPES; changes appear here after our next monthly update.