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

Guy Michael Grabau, MD

Individual provider Critical Care Medicine (Internal Medicine) Physician · NPI 1649275876

Guy Michael Grabau, MD is registered under Pulmonary Disease in Joplin, Missouri. Graduated from University of Kansas School of Med (KC/WICH/SAL) in 1986, 40 years ago. Practices with Freeman-Oak Hill Health System, a 385-clinician group and accepts Medicare assignment. Licensed in Missouri.

Years since qualifying
40
Trained at
University of Kansas School of Med (KC/WICH/SAL)
Licensed in
MO
In the registry since
2005
Specialties on file
2
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

1102 W 32nd St
Joplin, MO 64804-3503
Phone: (417) 347-4570
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Pulmonary Disease Physician (primary) Taxonomy 207RP1001X · Licence 2011040031 (MO)
Critical Care Medicine (Internal Medicine) Physician Taxonomy 207RC0200X · Licence 2011040031 (MO)

Record details

NPI number1649275876
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorYes
NPI enumeratedJune 15, 2005
Last updated in NPPESMarch 6, 2024
Certification dateMarch 6, 2024

Medicare enrollment

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

Medicare specialtyPULMONARY DISEASE
Also practisesCRITICAL CARE (INTENSIVISTS)
Medical schoolUNIVERSITY OF KANSAS SCHOOL OF MED (KC/WICH/SAL)
Graduated 1986 (40 years in practice)
Group practice Freeman-Oak Hill Health System — 385 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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 patients104
Services billed 310 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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 Freeman-Oak Hill Health System

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 385 clinicians in the practice; 12 are shown here.

Other providers in Joplin