William Mckenzie, FNP
NPI 1548979255 · Family Nurse Practitioner · Farmington, MO
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Mckenzie, FNP is a Family Nurse Practitioner provider in Farmington, MO (NPI 1548979255).
Provider details
- NPI number
- 1548979255
- Entity type
- Individual
- Primary specialty
- Family Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- FNP
- Sex
- Male
- Sole proprietor
- No
- License
- 2022045231 (MO)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
3 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
184 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) |
|---|---|---|
| Emergency Department Visit With High Level of Medical Decision Making99285 | 107 | $141 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 65 | $96 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 12 | $57 |
Typical Medicare-allowed amounts for these services range $57–$141 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 19 | 19 |
| Prednisone | 16 | 16 |
| Doxycycline Hyclate | 15 | 15 |
| Omeprazole | 14 | — |
| Naproxen | 13 | 12 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 13 | 13 |
| Cyclobenzaprine Hcl | 12 | 12 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2022-11-21
- Last updated
- 2022-11-21
- Certified
- 2022-11-21
Frequently asked questions
- What is William Mckenzie's NPI number?
- William Mckenzie's National Provider Identifier (NPI) is 1548979255, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mckenzie's specialty?
- William Mckenzie is listed in the NPPES registry with a primary specialty of Family Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is William Mckenzie located?
- William Mckenzie's practice location on file with NPPES is 1101 W Liberty St, Farmington, MO 63640-1921.
- What is William Mckenzie's phone number?
- The practice phone number listed in the NPPES registry for William Mckenzie is (573) 756-6451.
- Does William Mckenzie accept Medicare?
- William Mckenzie is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Mckenzie's NPI active?
- Yes — William Mckenzie's NPI (1548979255) is active in the NPPES registry as of the last update on 2022-11-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.