William Cayley, MD MDIV
NPI 1053340067 · Family Medicine Physician · Eau Claire, WI
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Cayley, MD MDIV is a Family Medicine Physician provider in Eau Claire, WI (NPI 1053340067).
Provider details
- NPI number
- 1053340067
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD MDIV
- Sex
- Male
- Sole proprietor
- No
- License
- 39025-20 (WI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
538 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 98 | $125 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 88 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 71 | $87 |
| Blood Test, Basic Group of Blood Chemicals (calcium, Total)80048 | 51 | $8 |
| Hemoglobin A1c Level83036 | 36 | $10 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, at Least 10 Minutes99307 | 30 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 76 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 167 | 45 |
| Lisinopril | 132 | 39 |
| Omeprazole | 106 | 25 |
| Metformin Hcl | 99 | 26 |
| Levothyroxine Sodium | 89 | 25 |
| Warfarin Sodium | 85 | 12 |
| Amlodipine Besylate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-02
- Last updated
- 2026-01-22
- Certified
- 2026-01-22
Frequently asked questions
- What is William Cayley's NPI number?
- William Cayley's National Provider Identifier (NPI) is 1053340067, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Cayley's specialty?
- William Cayley is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is William Cayley located?
- William Cayley's practice location on file with NPPES is 3802 Oakwood Mall Dr, Eau Claire, WI 54701-3016.
- What is William Cayley's phone number?
- The practice phone number listed in the NPPES registry for William Cayley is (715) 839-9280.
- Does William Cayley accept Medicare?
- William Cayley is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Cayley's NPI active?
- Yes — William Cayley's NPI (1053340067) is active in the NPPES registry as of the last update on 2026-01-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.