Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. William Clark Decker, DO

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1942205208

Dr. William Clark Decker, DO is a Pulmonary Disease in Adrian, Michigan. Graduated from Des Moines University of Osteopathic Medicine and Health Sciences in 1985, 41 years ago. Practices with Promedica Central Corporation of Michigan, a 112-clinician group and accepts Medicare assignment. Licensed in Michigan and Ohio.

Years since qualifying
41
Trained at
Des Moines University of Osteopathic Medicine and Health Sciences
Licensed in
MI, OH
In the registry since
2005
Specialties on file
4
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

See every abbreviation used in this directory →

Practice location Address checks out

777 Kimole Ln Ste 100
Adrian, MI 49221-1400
Phone: (517) 265-3411
Fax: (517) 263-7694
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence 5101009355 (MI)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence 5101009355 (MI)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence 34.008398 (OH)
Pulmonary Disease Physician Taxonomy 207RP1001X · Licence 34.008398 (OH)

Record details

NPI number1942205208
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorYes
NPI enumeratedJune 14, 2005
Last updated in NPPESNovember 3, 2023
Certification dateMarch 23, 2020
Mailing address777 Kimole Ln Ste 100, Adrian, MI 49221-1400

Medicare enrollment

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

Medicare specialtyPULMONARY DISEASE
Also practisesCRITICAL CARE (INTENSIVISTS)
Medical schoolDES MOINES UNIVERSITY OF OSTEOPATHIC MEDICINE AND HEALTH SCIENCES
Graduated 1985 (41 years in practice)
Group practice Promedica Central Corporation Of Michigan — 112 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare