DR. WILLIAM STEPHEN JR. LEFLER (MD) – Nephrology Physician, NPI 1023235058
Nephrology Physician
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
927 HOSPITALIST in CO
Provider Addresses for DR. WILLIAM STEPHEN JR. LEFLER (MD)
1600 Specht Point Rd Ste 127
Fort Collins, CO 805254311
Phone: (970) 221-3589
Fax: (970) 493-2682
Type: Location
670 SIERRA ROSE DR
RENO, NV 895112072
Phone: (775) 322-4550
Fax: (775) 322-4956
Type: Location
1600 SPECHT POINT RD STE 127
FORT COLLINS, CO 805254311
Phone: (970) 221-3589
Fax: (970) 493-2682
Type: Location
190 E BANNOCK ST
BOISE, ID 837126241
Phone:
Type: Mailing
746 N COLLEGE RD STE A
TWIN FALLS, ID 833013486
Phone: (208) 814-7230
Type: Location
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
This can happen when there are no reportable CMS Open Payments records.
Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2023-03-13
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking 3 Medicare enrollment records; no due dates published yet.
Enrollment records
3
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20140826002259 | I | Nephrology | CO | TBD |
| I20230213001359 | I | Nephrology | MN | TBD |
| I20230313002863 | I | Hospitalist | ID | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 99232 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 117 | 49 | $0 |
| 99213 | Established patient office or other outpatient visit, 20-29 minutes | 106 | 93 | $0 |
| 99214 | Established patient office or other outpatient visit, 30-39 minutes | 66 | 53 | $0 |
| 99233 | Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 45 | 23 | $0 |
| 99204 | New patient office or other outpatient visit, 45-59 minutes | 35 | 35 | $0 |
Insurance plans in this area (ZIP 80525)
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Provider's Procedures
| Specialty | Practice State | HCPCS Code | Description | Service Count | Beneficiary Count |
|---|---|---|---|---|---|
| NEPHROLOGY | CO | 81002 | Urinalysis, manual test | 58 | 58 |
| NEPHROLOGY | CO | 90935 | Hemodialysis procedure with one physician evaluation | 145 | 88 |
| NEPHROLOGY | CO | 90961 | Dialysis services (2-3 physician visits per month), patient 20 years of age and older | 156 | 34 |
Group practice members
| Name | Specialty | State |
|---|---|---|
| - | WY | |
| Nurse Practitioner | ID | |
| - | CO | |
| - | CO | |
| - | CO | |
| - | AZ | |
| Radiation Oncology | OK | |
| - | CO | |
| - | CO | |
| Diagnostic Radiology, Interventional Radiology | TX |
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