Spencer Ryan Idstein, M.D.
Internal Medicine Physician · Prospect, KY
Spencer Ryan Idstein, M.D. is an internal medicine physician with a practice address in Prospect, Kentucky, and NPI 1205194693, issued on Apr 24, 2012. Check the license (Kentucky 49531, as entered in NPPES) on the Kentucky Board of Medical Licensure; the Medicare figures below come from public CMS files.
- Name
- Spencer Ryan Idstein
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 49531 KY
Self-reported in NPPES; status is on the state search - Practice location
- 6341 Meeting St Ste 102, Prospect, KY 40059
- Phone
- (502) 566-0300
- Enumerated
- Apr 24, 2012
- Record last updated
- Dec 8, 2023
- Medicaid ID
- 7100439060 KY
- Medicare enrollment
- Enrolled (PECOS I20160912001660); accepts Medicare assignment
- Medical or professional school
- University Of Louisville School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,526 in Kentucky → Look up another NPI →
Also registered at 6341 Meeting St Ste 102
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Nicole Strecker, M.D.Internal Medicine Physician1336482413
Verify Spencer Ryan Idstein in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersKentucky Board of Medical Licensure
Search for license 49531Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
54% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,468 Medicare Part D claims for 207 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Amlodipine Besylate73 claims
- Atorvastatin Calcium73 claims
- Rosuvastatin Calcium73 claims
- Lisinopril59 claims
- Levothyroxine Sodium51 claims
- Pantoprazole Sodium45 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.
The MIPS final score for 2023 (Medicare payment program): 95.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Internal Medicine And Pediatric Partners PLLCProspect, KY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Spencer Ryan Idstein among 1,526 internal medicine physician records in Kentucky
Spencer Ryan Idstein, M.D. is one of 1,526 internal medicine physician records with a practice address in Kentucky. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 67% of them.
- NPI issued2012 · 67% of these records are older, 31% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2012 · median 2006 among the 1,025 with a school on file
- Record last updated2023 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Kentucky practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
17 internal medicine physician records list a practice address in Prospect
They are 17 of the 227 NPPES records with a practice address in Prospect, and 1,526 internal medicine physician records in Kentucky.
All 1,526 in Kentucky → Every provider in Prospect → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Padmapriya Balakrishna, M.D.Prospect, KY 400591295709251
- Elizabeth Bates, M.D.Prospect, KY 400591932164134
- James Bosler, MDProspect, KY 400591932173887
- Michael Chesnut, M.D.Prospect, KY 400591821127333
- Gregory Ciliberti, MDProspect, KY 400591285657585
- Salvatore Ciliberti, M.D.Prospect, KY 400591770506073
- Reem Hamad, MDProspect, KY 400591215933080
- Diana Han, MDProspect, KY 400591528237161
Common questions
What is Spencer Ryan Idstein, M.D.'s NPI number?
Spencer Ryan Idstein, M.D.'s National Provider Identifier (NPI) is 1205194693, issued on Apr 24, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Spencer Ryan Idstein, M.D. located?
The NPPES record lists a practice address at 6341 Meeting St Ste 102, Prospect, KY, 40059. Phone: (502) 566-0300. Providers update this record themselves, so call before visiting.
How can I verify Spencer Ryan Idstein, M.D.'s license?
NPPES lists Kentucky license number 49531, as entered by the provider. Search the Kentucky Board of Medical Licensure at https://web1.ky.gov/GenSearch/LicenseSearch.aspx?AGY=5. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Spencer Ryan Idstein, M.D. prescribe under Medicare Part D?
In 2024, Spencer Ryan Idstein, M.D. had 1,468 Medicare Part D claims for 207 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Spencer Ryan Idstein, M.D.'s MIPS final score?
The 2023 MIPS final score is 95.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.