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

Marshall Greiman, MD

Individual provider Otolaryngology Physician · NPI 1376657957

Marshall Greiman, MD practises Otolaryngology in Clive, Iowa. Graduated from University of Iowa, Rj & L Carver College of Medicine in 1985, 41 years ago. Practices with Mercy Clinics Inc, a 442-clinician group and accepts Medicare assignment. Licensed in Iowa.

Years since qualifying
41
Trained at
University of Iowa, Rj & L Carver College of Medicine
Licensed in
IA
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

1601 NW 114th St Ste 230
Clive, IA 50325-7007
Phone: (515) 222-7761
Fax: (515) 222-7926
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Otolaryngology Physician (primary) Taxonomy 207Y00000X · Licence 25508 (IA)

Record details

NPI number1376657957
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedAugust 19, 2006
Last updated in NPPESFebruary 13, 2024
Certification dateFebruary 13, 2024

Medicare enrollment

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

Medicare specialtyOTOLARYNGOLOGY
Medical schoolUNIVERSITY OF IOWA, RJ & L CARVER COLLEGE OF MEDICINE
Graduated 1985 (41 years in practice)
Group practice Mercy Clinics Inc — 442 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 on file with Medicare

Procedures

From CMS Care Compare, which counts the procedures a clinician billed to Original Medicare and Medicare Advantage over a recent 12-month period. CMS reports a fixed list of common procedures, so this is not everything the clinician does. Counts of 10 or fewer are given as a range, because CMS withholds small numbers.

Skin biopsy 1–10 times

The percentile compares how often this clinician performed the procedure with other clinicians who performed it, as CMS calculates it. It measures volume, not outcomes or skill.

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 patients380
Services billed 830 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.

  • Mercyone Des Moines Medical Center Hospital · Des Moines, IA

Colleagues at Mercy Clinics Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 442 clinicians in the practice; 12 are shown here.

Other providers in Clive