Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

William D Johnson, MD

Individual provider Family Medicine Physician · NPI 1255371944

William D Johnson, MD is registered under Family Practice in Farmington, Missouri. Graduated from At Still University of Health Sciences, College of Osteo Med, Kirksville in 1984, 42 years ago. Practices with Saint Francis Medical Center, a 441-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
42
Trained at
At Still University of Health Sciences, College of Osteo Med, Kirksville
Licensed in
MO
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

515 Maple Valley Dr
Farmington, MO 63640-1919
Phone: (573) 760-7920
Fax: (573) 756-9597
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence R9E08 (MO)

Record details

NPI number1255371944
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 8, 2006
Last updated in NPPESMarch 1, 2021
Certification dateMarch 1, 2021

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolAT STILL UNIVERSITY OF HEALTH SCIENCES, COLLEGE OF OSTEO MED, KIRKSVILLE
Graduated 1984 (42 years in practice)
Group practice Saint Francis Medical Center — 441 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients191
Services billed 430 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

Colleagues at Saint Francis Medical Center

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 441 clinicians in the practice; 12 are shown here.

Other providers in Farmington