Nancy Koster, M.D.
Cardiovascular Disease Physician · Spokane Valley, WA
Nancy Koster, M.D. is a cardiovascular disease physician with a practice address in Spokane Valley, Washington, and NPI 1073571741, issued on May 3, 2006. Check the license (Washington MD61103411, as entered in NPPES) on the Washington Medical Commission; the Medicare figures below come from public CMS files.
- Name
- Nancy Koster
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License numbers
- MD61103411 WA
M15380 ID
Self-reported in NPPES; status is on the state search - Practice location
- 16528 E Desmet CT Ste B3200, Spokane Valley, WA 99216
- Phone
- (509) 455-8820
- Enumerated
- May 3, 2006
- Record last updated
- Mar 20, 2026
- Medicaid IDs
- 100264481-00 NE
1073571741 IA - Medicare enrollment
- Enrolled (PECOS I20211216000404); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 1999
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 512 in Washington → Look up another NPI →
Also registered at 16528 E Desmet CT Ste B3200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Darren Hollenbaugh, MD, FACCCardiovascular Disease Physician1861425571
- Rachel Le, MDCardiovascular Disease Physician1184853244
- Jeremiah McKee, ARNPFamily Nurse Practitioner1457887937
- Stephen Roberts, DOCardiovascular Disease Physician1447811781
- Kavisha Singh, MDCardiovascular Disease Physician1780002485
- Courtney Smyth, DNPFamily Nurse Practitioner1841882321
Verify Nancy Koster in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWashington Medical Commission
Search for license MD61103411Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
35% fewer Medicare Part D claims than the average cardiovascular disease physician in 2024
2,005 Medicare Part D claims for 357 beneficiaries, against an average of 3,078 among the 20,728 providers of this specialty who prescribed in Part D. Brand-name drugs were 15% of claims.
Most prescribed
- Metoprolol Succinate221 claims
- Eliquis171 claims
- Rosuvastatin Calcium160 claims
- Atorvastatin Calcium151 claims
- Losartan Potassium106 claims
- Furosemide98 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.
Bills Medicare through one group practice
- Providence Health And Services WashingtonSpokane, WA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nancy Koster among 512 cardiovascular disease physician records in Washington
Nancy Koster, M.D. is one of 512 cardiovascular disease physician records with a practice address in Washington. 75% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 46% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1999 · median 2002 among the 351 with a school on file
- Record last updated2026 · 63% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a Washington practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Cardiovascular Disease Physician providers in Washington
There are 512 cardiovascular disease physician records in Washington.
All 512 in Washington → Every provider in Spokane Valley → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Darren Hollenbaugh, MD, FACCSpokane Valley, WA 992161861425571
- Guy Katz, MD, FACCSpokane Valley, WA 992161346265881
- Rachel Le, MDSpokane Valley, WA 992161184853244
- Stephen Roberts, DOSpokane Valley, WA 992161447811781
- Kavisha Singh, MDSpokane Valley, WA 992161780002485
- John Everett, MDSpokane, WA 992081336195759
- John Peterson, MD, FACCSpokane, WA 992081013931997
- Sean Spangler, MDSpokane, WA 992081982679619
Common questions
What is Nancy Koster, M.D.'s NPI number?
Nancy Koster, M.D.'s National Provider Identifier (NPI) is 1073571741, issued on May 3, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nancy Koster, M.D. located?
The NPPES record lists a practice address at 16528 E Desmet CT Ste B3200, Spokane Valley, WA, 99216. Phone: (509) 455-8820. Providers update this record themselves, so call before visiting.
How can I verify Nancy Koster, M.D.'s license?
NPPES lists Washington license number MD61103411, 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 Nancy Koster, M.D. prescribe under Medicare Part D?
In 2024, Nancy Koster, M.D. had 2,005 Medicare Part D claims for 357 beneficiaries; the average among cardiovascular disease physician prescribers was 3,078. 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.