William Stephen Lefler, MD
Nephrology Physician · Twin Falls, ID
William Stephen Lefler, MD is a nephrology physician with a practice address in Twin Falls, Idaho, and NPI 1023235058, issued on Apr 19, 2007. Check the license (Idaho MC-1695, as entered in NPPES) on the Idaho Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- William Stephen Lefler
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- MC-1695 ID
19535 NV
Self-reported in NPPES; status is on the state search - Practice location
- 746 N College RD Ste A, Twin Falls, ID 83301
- Phone
- (208) 814-7230
- Enumerated
- Apr 19, 2007
- Record last updated
- Dec 1, 2022
- Medicaid ID
- 1023235058 NV
- Medicare enrollment
- Enrolled (PECOS I20140826002259); accepts Medicare assignment
- Medical or professional school
- Medical College Of Georgia School Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 34 in Idaho → Look up another NPI →
Also registered at 746 N College RD Ste A
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Erin Goodfellow, NURSE PRACTITIONERNurse Practitioner1417540741
- Heather McGuire, MDNephrology Physician1508806100
- Rebecca Molina, FNPFamily Nurse Practitioner1184416935
- Madison Thompson, RNRegistered Nurse1477075570
Verify William Stephen Lefler in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIdaho Board of Medicine
Search for license MC-1695Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average nephrology physician in 2024
62 Medicare Part D claims for 39 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D.
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 2 group practices
- Banner Hospital Based Physicians Colorado LLCGreeley, CO
- Pocatello Health Services LLCPocatello, ID
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William Stephen Lefler among 34 nephrology physician records in Idaho
William Stephen Lefler, MD is one of 34 nephrology physician records with a practice address in Idaho. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 50% of them.
- NPI issued2007 · 50% of these records are older, 24% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 79% of these records are
- Graduated2007 · median 2002 among the 27 with a school on file
- Record last updated2022 · 44% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Idaho practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Idaho
There are 34 nephrology physician records in Idaho.
All 34 in Idaho → Every provider in Twin Falls → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Kenneth Cogen, M.D.Twin Falls, ID 833011629064555
- Heather McGuire, MDTwin Falls, ID 833011508806100
- Michelle Myers, D.O.Twin Falls, ID 833011962533083
- Nagraj Narasimhan, M.D.Twin Falls, ID 833011063449221
- Michael Haderlie, MDChubbuck, ID 832021700083813
- Naeem Rahim, M.D.Chubbuck, ID 832021235286808
- Fahim Rahim, M.D.Chubbuck, ID 832021164579736
- Ajith Kumar, MDLewiston, ID 835011609952381
Common questions
What is William Stephen Lefler, MD's NPI number?
William Stephen Lefler, MD's National Provider Identifier (NPI) is 1023235058, issued on Apr 19, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William Stephen Lefler, MD located?
The NPPES record lists a practice address at 746 N College RD Ste A, Twin Falls, ID, 83301. Phone: (208) 814-7230. Providers update this record themselves, so call before visiting.
How can I verify William Stephen Lefler, MD's license?
NPPES lists Idaho license number MC-1695, as entered by the provider. Search the Idaho Board of Medicine at https://dopl.idaho.gov/bom/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William Stephen Lefler, MD prescribe under Medicare Part D?
In 2024, William Stephen Lefler, MD had 62 Medicare Part D claims for 39 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.