Linda Diane Grossheim, MD
Radiation Oncology Physician · Spokane, WA
Linda Diane Grossheim, MD is a radiation oncology physician with a practice address in Spokane, Washington, and NPI 1548211360, issued on May 15, 2006. Check the license (Washington MD60855711, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Linda Diane Grossheim
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- MD60855711 WA
4301091129 MI
64928 AZ
C172502 CA
91727 GA
and 4 more
Self-reported in NPPES; status is on the state search - Practice location
- 910 W 5TH Ave Ste 102B, Spokane, WA 99204
- Phone
- (509) 755-5783
- Enumerated
- May 15, 2006
- Record last updated
- Jul 1, 2026
- Fax
- (509) 459-1522
- Medicaid IDs
- 1548211360 MI
1548211360 ID
2103992 WA
34597700 WI - Medicare enrollment
- Enrolled (PECOS I20180731002528); accepts Medicare assignment
- Medical or professional school
- University Of Michigan Medical School, 1993
- Entity
- Type 1 · individual
8 nearest radiation oncology physician records → All 198 in Washington → Look up another NPI →
Also registered at 910 W 5TH Ave Ste 102B
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Zachary Guss, MDRadiation Oncology Physician1497195762
- Sasha SwensenRadiation Oncology Physician1174151815
Verify Linda Diane Grossheim in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60855711Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
37% fewer Medicare Part D claims than the average radiation oncology physician in 2024
85 Medicare Part D claims for 35 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D.
Most prescribed
- Tamsulosin Hcl26 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $83.38
3 payments; by number, the most common kind was food and beverage; the largest payer was Daiichi Sankyo Inc. The 3,275 providers of this specialty with any payment received $1,897.85 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Beacon Cancer Care PLLCPost Falls, ID
- Multicare Health SystemTacoma, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Linda Diane Grossheim among 198 radiation oncology physician records in Washington
Linda Diane Grossheim, MD is one of 198 radiation oncology physician records with a practice address in Washington. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 52% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1993 · median 2006 among the 141 with a school on file
- Record last updated2026 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0001X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Radiation Oncology Physician providers in Washington
There are 198 radiation oncology physician records in Washington.
All 198 in Washington → Every provider in Spokane → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Zachary Guss, MDSpokane, WA 992041497195762
- Paula Schomberg, M.D.Spokane, WA 992041245218536
- Sasha SwensenSpokane, WA 992041174151815
- Stephen Thatcher, M.D.Spokane, WA 992041851628077
- Susan Laing, MDSpokane, WA 992081164414785
- David Davenport, MDSpokane Valley, WA 992161558353052
- Karie-Lynn Kelly, M.D.. F.R.C.P.C.Spokane Valley, WA 992161417027640
- Michael Kos, MDSpokane Valley, WA 992161366599631
Common questions
What is Linda Diane Grossheim, MD's NPI number?
Linda Diane Grossheim, MD's National Provider Identifier (NPI) is 1548211360, issued on May 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Linda Diane Grossheim, MD located?
The NPPES record lists a practice address at 910 W 5TH Ave Ste 102B, Spokane, WA, 99204. Phone: (509) 755-5783. Providers update this record themselves, so call before visiting.
How can I verify Linda Diane Grossheim, MD's license?
NPPES lists Washington license number MD60855711, as entered by the provider. Search the Washington Medical Commission at https://wahelms.my.site.com/s/license-search. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Linda Diane Grossheim, MD prescribe under Medicare Part D?
In 2024, Linda Diane Grossheim, MD had 85 Medicare Part D claims for 35 beneficiaries; the average among radiation oncology physician prescribers was 134. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.