Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. Linda Diane Grossheim, MD

Individual provider Radiation Oncology Physician · NPI 1548211360

Dr. Linda Diane Grossheim, MD practises Radiation Oncology in Spokane, Washington. Graduated from University of Michigan Medical School in 1993, 33 years ago. Practices with Ozarks Medical Center, a 173-clinician group, works from 4 locations and accepts Medicare assignment. Licensed in Arizona, California, Georgia and Hawaii and 5 more.

Years since qualifying
33
Trained at
University of Michigan Medical School
Licensed in
AZ, CA, GA, HI, ID, MI
In the registry since
2006
Specialties on file
9
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

910 W 5th Ave Ste 102B
Spokane, WA 99204-2948
Phone: (509) 755-5783
Fax: (509) 459-1522
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (3)

  • 1641 E Polston Ave Ste 102, Post Falls, ID 83854-7852 — (208) 755-2804
  • 1100 N Kentucky Ave, West Plains, MO 65775-2029 — (417) 256-9111
  • 844 N 5th Ave, Sequim, WA 98382-3045 — (360) 683-9895

Specialties & licences

Radiation Oncology Physician (primary) Taxonomy 2085R0001X · Licence 4301091129 (MI)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence M-14269 (ID)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 64928 (AZ)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence MD-22376 (HI)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence MD60855711 (WA)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 43521-020 (WI)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 91727 (GA)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence 2025050456 (MO)
Radiation Oncology Physician Taxonomy 2085R0001X · Licence C172502 (CA)

Record details

NPI number1548211360
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 15, 2006
Last updated in NPPESJuly 1, 2026
Certification dateJuly 1, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyRADIATION ONCOLOGY
Medical schoolUNIVERSITY OF MICHIGAN MEDICAL SCHOOL
Graduated 1993 (33 years in practice)
Group practice Ozarks Medical Center — 173 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations5 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients192
Services billed 974 a service is one billed item, such as a visit, a test or a procedure
Average patient age77

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $138 6 payments · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Deaconess Medical Center Hospital · Spokane, WA
  • Ozarks Healthcare Hospital · West Plains, MO

Colleagues at Ozarks Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 173 clinicians in the practice; 12 are shown here.

Other providers in Spokane