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DR. WILLIAM STEPHEN LEFLER JR. MD
NPI 1023235058
Internal Medicine - Nephrology in Twin Falls, ID

Active since April 19, 2007PECOS EnrolledAccepts Medicare Assignment
746 N COLLEGE RD STE A, TWIN FALLS, ID 83301(208) 814-7230 Get Directions Write a Review

NPPES record last updated: December 1, 2022. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 1, 2022, Feb 18, 2021, Jan 30, 2020 and 1 more (4 updates tracked since 2016).

About Dr. William Stephen Lefler Jr. Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM STEPHEN LEFLER JR. MD (NPI 1023235058) is an individual nephrology provider in Twin Falls, Idaho, licensed in Idaho (MC-1695) and active in the NPI registry since April 2007. He is enrolled in Medicare PECOS, is affiliated with Portneuf Medical Center, and maintains a secondary practice location in Fort Collins.

NPPES Registry Identity

NPI1023235058
Entity TypeIndividualMale
Primary Taxonomy207RN0300X
Provider Legal NameDR. WILLIAM STEPHEN LEFLER JR.Credential: MD
Location Address746 N COLLEGE RD STE ATwin Falls, ID 83301-3486
Mailing Address190 E Bannock StBoise, ID 83712-6241
Phone(208) 814-7230
Sole ProprietorNo
Medical School CMSMedical College Of Georgia School Of MedicineGraduated 2007
Enumeration DateApril 19, 2007
Last NPPES UpdateDecember 1, 20224 updates tracked since enumeration
NPPES CertifiedDecember 1, 2022
✔ NPI 1023235058 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians
Taxonomy Code207RN0300X
Licenses✔ Licensed in ID · MC-1695✔ Licensed in NV · 19535
Definition
An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.
746 N COLLEGE RD STE A, Twin Falls, ID 83301
Open in Google Maps ↗

Secondary Practice Location 1

Location 11600 Specht Point Rd Ste 127Fort Collins, CO 80525-4311 · Phone (970) 221-3589 · Fax (970) 493-2682

Other Identifiers 1

Medicaid1023235058NV

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Wyoming, Moda Health Plan, Inc., PacificSource Health Plans and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. William Stephen Lefler Jr. Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID8325172711
PECOS Enrollment IDI20140826002259, I20230313002863
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

5

Medicare enrollment records show William Lefler reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

St Luke's Clinic LLC
1.6 mi
Family Medicine
775 POLE LINE RD W
Twin Falls, ID 83301
  • Reassigned Medicare billing, Idaho enrollment
  • Medicare enrollment name: St Lukes Clinic LLC
  • 322 clinicians in this Medicare group
NPI 1790718229 (208) 814-1000
Pocatello Health Services, LLC
105 mi
General Acute Care Hospital
651 MEMORIAL DR
Pocatello, ID 83201
  • Reassigned Medicare billing, Idaho enrollment
  • 190 clinicians in this Medicare group
NPI 1689802852 (208) 239-2110
Nephrology Clinic PC
508 mi
Nephrology
3351 EASTBROOK DR STE 100
Fort Collins, CO 80525
  • Reassigned Medicare billing, Colorado enrollment
  • 24 clinicians in this Medicare group
NPI 1942297742 (970) 493-7733
Banner Hospital Based Physicians Colorado LLC
510 mi
Multi-Specialty
4700 LADY MOON DR
Fort Collins, CO 80528
  • Reassigned Medicare billing, Colorado enrollment
  • 163 clinicians in this Medicare group
NPI 1386034122 (970) 229-4500
Hennepin Healthcare System, Inc
1,070 mi
Clinic/Center
300 S 6TH ST, GOVERNMENT CENTER-A 120
Minneapolis, MN 55487
  • Reassigned Medicare billing, Minnesota enrollment
  • 1,247 clinicians in this Medicare group
NPI 1528361573 (612) 348-4628

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 3

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232
Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.
87 services41 patients
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222
Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.
20 services20 patients
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233
Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.
19 services11 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Portneuf Medical Center

Acute Care Hospitals · Pocatello, ID
4/5 CMS rating
OwnershipProprietary
CMS Certification Number130028
Location777 Hospital WayPocatello, ID 83201 · Bannock County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 83301 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$121.27 typical visit price
range $52.44 – $160.17
Typical copayment $30.31 (range $13.11 – $40.04)
Most-billed visit code 99204
Established Patient
$93.26 typical visit price
range $16.68 – $130.93
Typical copayment $23.31 (range $4.17 – $32.73)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

Reported Quality Measures

Breast Cancer Screening
Percentage of women 50-74 years of age who had a mammogram to screen for breast cancer
37%153 patients2/55-star benchmark: 92%
Cervical Cancer Screening
Percentage of women 21-64 years of age who were screened for cervical cancer using either of the following criteria: - Women age 21-64 who had cervical cytology performed every 3 years - Women age 30-64 who had cervical cytology/human papillomavirus (HPV)…
14%121 patients
Closing the Referral Loop: Receipt of Specialist Report
Percentage of patients with referrals, regardless of age, for which the referring provider receives a report from the provider to whom the patient was referred
21%42 patients1/55-star benchmark: 95%
Colorectal Cancer Screening
Percentage of adults 50-75 years of age who had appropriate screening for colorectal cancer
40%334 patients2/55-star benchmark: 85%
Depression Utilization of the PHQ-9 Tool
The percentage of patients age 18 and older with the diagnosis of major depression or dysthymia who have a completed PHQ-9 during each applicable 4 month period in which there was a qualifying visit
Patients 4MonthsOfEnd: 5% · 42 patients
7%43 patients
Diabetes: Eye Exam
Percentage of patients 18-75 years of age with diabetes who had a retinal or dilated eye exam by an eye care professional during the measurement period or a negative retinal exam (no evidence of retinopathy) in the 12 months prior to the measurement period
22%169 patients1/55-star benchmark: 100%
Diabetes: Foot Exam
The percentage of patients 18-75 years of age with diabetes (type 1 and type 2) who received a foot exam (visual inspection and sensory exam with mono filament and a pulse exam) during the measurement year
29%169 patients2/55-star benchmark: 98%
Diabetes: Medical Attention for Nephropathy
The percentage of patients 18-75 years of age with diabetes who had a nephropathy screening test or evidence of nephropathy during the measurement period
100%169 patients5/55-star benchmark: 99%
Documentation of Current Medications in the Medical Record
Percentage of visits for patients aged 18 years and older for which the eligible professional or eligible clinician attests to documenting a list of current medications using all immediate resources available on the date of the encounter.
91%935 patients4/55-star benchmark: 100%
e-Prescribing
At least one permissible prescription written by the MIPS eligible clinician is queried for a drug formulary and transmitted electronically using certified EHR technology.
96%1,637 patients4/55-star benchmark: 99%
Falls: Screening for Future Fall Risk
Percentage of patients 65 years of age and older who were screened for future fall risk during the measurement period
39%368 patients2/55-star benchmark: 99%
Medication Reconciliation
The MIPS eligible clinician performs medication reconciliation for at least one transition of care in which the patient is transitioned into the care of the MIPS eligible clinician.
91%390 patients3/55-star benchmark: 100%
Patient-Specific Education
The MIPS eligible clinician must use clinically relevant information from CEHRT to identify patient-specific educational resources and provide access to those materials to at least one unique patient seen by the MIPS eligible clinician.
95%636 patients4/55-star benchmark: 97%
Pneumococcal Vaccination Status for Older Adults
Percentage of patients 65 years of age and older who have ever received a pneumococcal vaccine
45%368 patients3/55-star benchmark: 90%
Preventive Care and Screening: Body Mass Index (BMI) Screening and Follow-Up Plan
Percentage of patients aged 18 years and older with a BMI documented during the current encounter or during the previous twelve months AND with a BMI outside of normal parameters, a follow-up plan is documented during the encounter or during the previous…
26%614 patients2/55-star benchmark: 97%
Preventive Care and Screening: Influenza Immunization
Percentage of patients aged 6 months and older seen for a visit between October 1 and March 31 who received an influenza immunization OR who reported previous receipt of an influenza immunization
36%468 patients2/55-star benchmark: 88%
Preventive Care and Screening: Screening for Depression and Follow-Up Plan
Percentage of patients aged 12 years and older screened for depression on the date of the encounter using an age appropriate standardized depression screening tool AND if positive, a follow-up plan is documented on the date of the positive screen
30%491 patients2/55-star benchmark: 96%
Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention
Percentage of patients aged 18 years and older who were screened for tobacco use one or more times within 24 months AND who received tobacco cessation intervention if identified as a tobacco user
Patients tobacco: 89% · 206 patients
97%206 patients
Provide Patient Access
At least one patient seen by the MIPS eligible clinician during the performance period is provided timely access to view online, download, and transmit to a third party their health information subject to the MIPS eligible clinician's discretion to withhold…
100%636 patients5/55-star benchmark: 100%
Secure Messaging
For at least one unique patient seen by the MIPS eligible clinician during the performance period, a secure message was sent using the electronic messaging function of CEHRT to the patient (or the patient-authorized representative), or in response to a secure…
38%636 patients2/55-star benchmark: 89%
Statin Therapy for the Prevention and Treatment of Cardiovascular Disease
Percentage of the following patients - all considered at high risk of cardiovascular events - who were prescribed or were on statin therapy during the measurement period: - Adults aged >= 21 years who were previously diagnosed with or currently have an active…
78%315 patients4/55-star benchmark: 89%
Use of High-Risk Medications in the Elderly
Percentage of patients 65 years of age and older who were ordered high-risk medications. Two rates are submitted. 1) Percentage of patients who were ordered at least one high-risk medication.
Lower rates are better for this measure.
Patients 2+: 1% · 368 patients
1%368 patients4/55-star benchmark: 100%
View, Download, or Transmit (VDT)
At least one patient seen by the MIPS eligible clinician during the performance period (or patient-authorized representative) views, downloads or transmits their health information to a third party during the performance period.
36%636 patients
Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

REBECCA ANN MOLINA FNP
Nurse Practitioner (Family)
746 N COLLEGE RD STE A
TWIN FALLS, ID 83301
Twin Falls County (208) 814-7230
ERIN GOODFELLOW NURSE PRACTITIONER
Nurse Practitioner
746 N COLLEGE RD STE A
TWIN FALLS, ID 83301
Twin Falls County (208) 814-7230
MADISON ANDERTON THOMPSON RN
Registered Nurse
746 N COLLEGE RD STE A
TWIN FALLS, ID 83301
Twin Falls County (208) 814-7271
HEATHER MCGUIRE MD
Internal Medicine (Nephrology)
746 N COLLEGE RD STE A
TWIN FALLS, ID 83301
Twin Falls County (208) 814-8230

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Lefler's NPI number?

The NPI number for William Lefler is 1023235058. It was assigned to this individual provider in the NPPES registry on April 19, 2007.

Where is William Lefler located?

William Lefler practices at 746 N College Rd Ste A, Twin Falls, ID 83301. The listed phone number is (208) 814-7230.

What is William Lefler's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is William Lefler enrolled in Medicare?

Yes. William Lefler is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for William Lefler's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Lefler reassigns Medicare benefits to 5 organizations: St Luke's Clinic LLC (Twin Falls, ID), Pocatello Health Services, LLC (Pocatello, ID), Nephrology Clinic PC (Fort Collins, CO), Banner Hospital Based Physicians Colorado LLC (Fort Collins, CO) and Hennepin Healthcare System, Inc (Minneapolis, MN). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Lefler's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does William Lefler accept?

Health plans from Blue Cross Blue Shield of Wyoming, Moda Health Plan, Inc., PacificSource Health Plans and Providence Health Plan list William Lefler as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is William Lefler affiliated with any hospitals?

According to CMS data, William Lefler is affiliated with Portneuf Medical Center.

When was this NPI record last updated?

The NPPES record for William Lefler was last updated on December 1, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.