Zachary David Guss, MD
Radiation Oncology Physician · Spokane, WA
Zachary David Guss, MD is a radiation oncology physician with a practice address in Spokane, Washington, and NPI 1497195762, issued on Jul 1, 2013. Check the license (Washington MD00017033, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Zachary David Guss
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License number
- MD00017033 WA
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
- Jul 1, 2013
- Record last updated
- Jul 12, 2022
- Fax
- (509) 459-1522
- Medicare enrollment
- Enrolled (PECOS I20180719004070); accepts Medicare assignment
- Medical or professional school
- Johns Hopkins University School Of Medicine, 2013
- Telehealth
- Offers telehealth (CMS)
- 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.
- Linda Grossheim, MDRadiation Oncology Physician1548211360
- Sasha SwensenRadiation Oncology Physician1174151815
Verify Zachary David Guss in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD00017033Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
30% more Medicare Part D claims than the average radiation oncology physician in 2024
174 Medicare Part D claims for 83 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. 42 claims were for opioids.
Most prescribed
- Dexamethasone22 claims
- Memantine Hcl18 claims
- Lorazepam17 claims
- Triamcinolone Acetonide17 claims
- Hydrocodone-Acetaminophen14 claims
- Oxycodone Hcl13 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: $31.16
1 payment: food and beverage; the largest payer was Skeletal Dynamics 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 one group practice
- Multicare Health SystemTacoma, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Zachary David Guss among 198 radiation oncology physician records in Washington
Zachary David Guss, 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 2013, is newer than 73% of them.
- NPI issued2013 · 73% of these records are older, 24% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2013 · median 2006 among the 141 with a school on file
- Record last updated2022 · 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
- Linda Grossheim, MDSpokane, WA 992041548211360
- 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 Zachary David Guss, MD's NPI number?
Zachary David Guss, MD's National Provider Identifier (NPI) is 1497195762, issued on Jul 1, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Zachary David Guss, 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 Zachary David Guss, MD's license?
NPPES lists Washington license number MD00017033, 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 Zachary David Guss, MD prescribe under Medicare Part D?
In 2024, Zachary David Guss, MD had 174 Medicare Part D claims for 83 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.