Kristen M. Riegert, MD
Radiation Oncology Physician · Walla Walla, WA
Kristen M. Riegert, MD is a radiation oncology physician with a practice address in Walla Walla, Washington, and NPI 1164658209, issued on Jun 3, 2009. Check the license (Washington MD60444423, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Kristen M. Riegert
- Credential
- MD
- Primary taxonomy
- Radiation Oncology Physician 2085R0001X
- License numbers
- MD60444423 WA
LL18588 OR
Self-reported in NPPES; status is on the state search - Practice location
- 401 W Poplar St, Walla Walla, WA 99362
- Phone
- (509) 897-5700
- Enumerated
- Jun 3, 2009
- Record last updated
- Jul 30, 2018 (not updated in 8 years: call before relying on the address or phone)
- Fax
- (509) 897-5705
- Medicare enrollment
- Enrolled (PECOS I20240801003494); accepts Medicare assignment
- Medical or professional school
- Oregon Health Sciences University School Of Medicine, 2009
- 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 401 W Poplar St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mohammed Omar Ahmed, M.DInternal Medicine Physician1659756443
- Jose AlanisEmergency Medicine Physician1720461502
- Christopher Aldrich, M.D.Anesthesiology Physician1891084562
- Tami Arias, RNDiabetes Educator Registered Nurse1760959514
- Caroline Arnold, MDEmergency Medicine Physician1811492739
- Alexandra Baker, DNPNurse Practitioner1306473202
Verify Kristen M. Riegert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD60444423Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% more Medicare Part D claims than the average radiation oncology physician in 2024
195 Medicare Part D claims for 62 beneficiaries, against an average of 134 among the 4,851 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 22 claims were for opioids.
Most prescribed
- Levothyroxine Sodium39 claims
- Tamsulosin Hcl36 claims
- Gabapentin22 claims
- Oxybutynin Chloride Er15 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: $58.18
2 payments; by number, the most common kind was food and beverage; the largest payer was Mim Software 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
- Intermountain Medical Group Grand Junction, LLCGrand Junction, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kristen M. Riegert among 198 radiation oncology physician records in Washington
Kristen M. Riegert, 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 2009, is newer than 60% of them.
- NPI issued2009 · 60% of these records are older, 35% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated2009 · median 2006 among the 141 with a school on file
- Record last updated2018 · 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 Walla Walla → Radiation Oncology Physician nationwide →
The 8 radiation oncology physician records with the nearest ZIP codes
- Ian Gallaher, MDWalla Walla, WA 993621801152160
- Juno Choe, M.D., PH.D.Kennewick, WA 993361700099439
- Richard Giever, MDKennewick, WA 993361912981135
- Ryan Kraus, MDKennewick, WA 993361528509767
- Sue Mandell, MDKennewick, WA 993361578668406
- Sheila Rege, MDKennewick, WA 993361003890336
- Andrew Roehrig, MDKennewick, WA 993361225526890
- Peter Sien, MDKennewick, WA 993361053399568
Common questions
What is Kristen M. Riegert, MD's NPI number?
Kristen M. Riegert, MD's National Provider Identifier (NPI) is 1164658209, issued on Jun 3, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Kristen M. Riegert, MD located?
The NPPES record lists a practice address at 401 W Poplar St, Walla Walla, WA, 99362. Phone: (509) 897-5700. Providers update this record themselves, so call before visiting.
How can I verify Kristen M. Riegert, MD's license?
NPPES lists Washington license number MD60444423, 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 Kristen M. Riegert, MD prescribe under Medicare Part D?
In 2024, Kristen M. Riegert, MD had 195 Medicare Part D claims for 62 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.