DR. MICHAEL CRAIG OLTHOFF MD
NPI 1134500408
Internal Medicine - Infectious Disease in Iowa City, IA
About Dr. Michael Craig Olthoff Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MICHAEL CRAIG OLTHOFF MD (NPI 1134500408) is an individual infectious disease provider in Iowa City, Iowa, licensed in Iowa (MD-46612) and active in the NPI registry since June 2015. He is enrolled in Medicare PECOS, is affiliated with University Of Iowa Health Care Medical Center Down, and maintains 3 additional practice locations.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Locations 3
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Michael Craig Olthoff Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
3Medicare enrollment records show Michael Olthoff reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Iowa City, IA 52242
- Reassigned Medicare billing, Iowa enrollment
- 2,190 clinicians in this Medicare group
Muscatine, IA 52761
- Reassigned Medicare billing, Iowa enrollment
- 1,506 clinicians in this Medicare group
Aurora, CO 80012
- Reassigned Medicare billing, Colorado enrollment
- 13 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Iowa Health Care Medical Center Down
Acute Care Hospitals · Iowa City, IAUniversity Of Iowa Hospital & Clinics
Acute Care Hospitals · Iowa City, IAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 52242 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
IOWA CITY, IA 52242
IOWA CITY, IA 52242
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Michael Olthoff's NPI number?
The NPI number for Michael Olthoff is 1134500408. It was assigned to this individual provider in the NPPES registry on June 12, 2015.
Where is Michael Olthoff located?
Michael Olthoff practices at 200 Hawkins Dr, Iowa City, IA 52242. The listed phone number is (319) 356-7740.
What is Michael Olthoff's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.
Is Michael Olthoff enrolled in Medicare?
Yes. Michael Olthoff is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Michael Olthoff's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Olthoff reassigns Medicare benefits to 3 organizations: State University Of Iowa (Iowa City, IA), Iowa Physicians Clinic Medical Foundation (Muscatine, IA) and Rocky Mountain Infectious Disease Specialists, P.C. (Aurora, CO). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Michael Olthoff's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Olthoff accept?
Health plans from Oscar Insurance Company, Sanford Health Plan and Wellmark Health Plan of Iowa, Inc. list Michael Olthoff as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is Michael Olthoff affiliated with any hospitals?
According to CMS data, Michael Olthoff is affiliated with University Of Iowa Health Care Medical Center Down and University Of Iowa Hospital & Clinics.
When was this NPI record last updated?
The NPPES record for Michael Olthoff was last updated on August 5, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Michael Craig Olthoff, MD · NPI 1134500408
Infectious Disease physician in Iowa City, Iowa. Individual provider, active in the CMS NPPES registry since June 12, 2015.
## Identity
- **NPI:** 1134500408 (Entity type: Individual)
- **Enumerated:** June 12, 2015
- **Primary specialty:** Internal Medicine - Infectious Disease · taxonomy 207RI0200X
- **State license:** MD-46612 (Iowa)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 HAWKINS DR, Iowa City, IA 52242-1009
- **Phone:** (319) 356-7740 · **Fax:** (319) 356-4600
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): State University Of Iowa (NPI 1114905387, Iowa City, IA); Iowa Physicians Clinic Medical Foundation (NPI 1982831426, Muscatine, IA); Rocky Mountain Infectious Disease Specialists, P.C. (NPI 1629078993, Aurora, CO) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Iowa, Rj & L Carver College Of Medicine, class of 2015
## Record status
- **NPPES last updated:** August 5, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1134500408) · Data from the CMS NPPES public registry.