MITCHELL ONKEN M.D.
NPI 1427444538
Psychiatry & Neurology - Vascular Neurology in Iowa City, IA
About Mitchell Onken M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MITCHELL ONKEN M.D. (NPI 1427444538) is an individual vascular neurology provider in Iowa City, Iowa, licensed in Iowa (MD-57357) and active in the NPI registry since April 2015. He is enrolled in Medicare PECOS, is affiliated with University Of Iowa Hospital & Clinics, and is a graduate of Other (2015).
NPPES Registry Identity
Specialties & Licenses 2
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
Mitchell Onken M.d. 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 Mitchell Onken 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
Philipsburg, PA 16866
- Reassigned Medicare billing, Pennsylvania enrollment
- 4,429 clinicians in this Medicare group
Lewisburg, PA 17837
- Reassigned Medicare billing, Pennsylvania enrollment
- 303 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 6
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 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
University Of Iowa Hospital & Clinics
Acute Care Hospitals · Iowa City, IAGeisinger-Community Medical Center
Acute Care Hospitals · Scranton, PAGeisinger Medical Center
Acute Care Hospitals · Danville, PAUpmc Williamsport
Acute Care Hospitals · Williamsport, PAGeisinger Wyoming Valley Medical Center
Acute Care Hospitals · Wilkes Barre, PAPhysician 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 Mitchell Onken's NPI number?
The NPI number for Mitchell Onken is 1427444538. It was assigned to this individual provider in the NPPES registry on April 15, 2015.
Where is Mitchell Onken located?
Mitchell Onken practices at 200 Hawkins Dr, Iowa City, IA 52242. The listed phone number is (319) 356-2952.
What is Mitchell Onken's specialty?
The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Vascular Neurology, with taxonomy code 2084V0102X.
Is Mitchell Onken enrolled in Medicare?
Yes. Mitchell Onken 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 Mitchell Onken's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mitchell Onken reassigns Medicare benefits to 3 organizations: State University Of Iowa (Iowa City, IA), Geisinger Clinic (Philipsburg, PA) and Evangelical Medical Services Organization (Lewisburg, PA). 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 Mitchell Onken's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mitchell Onken accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Buckeye Health Plan, Ambetter from NH Healthy Families and Ambetter from Sunflower Health Plan and 3 other insurers list Mitchell Onken 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 Mitchell Onken affiliated with any hospitals?
According to CMS data, Mitchell Onken is affiliated with University Of Iowa Hospital & Clinics, Geisinger-Community Medical Center, Geisinger Medical Center, Upmc Williamsport and Geisinger Wyoming Valley Medical Center.
When was this NPI record last updated?
The NPPES record for Mitchell Onken was last updated on August 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# Mitchell Onken, M.D. · NPI 1427444538
Vascular Neurology physician in Iowa City, Iowa. Individual provider, active in the CMS NPPES registry since April 15, 2015.
## Identity
- **NPI:** 1427444538 (Entity type: Individual)
- **Enumerated:** April 15, 2015
- **Primary specialty:** Psychiatry & Neurology - Vascular Neurology · taxonomy 2084V0102X
- **State license:** MD-57357 (Iowa)
- **Sole proprietor:** No
## Practice location
- **Address:** 200 HAWKINS DR, Iowa City, IA 52242-1009
- **Phone:** (319) 356-2952 · **Fax:** (319) 356-4505
## 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); Geisinger Clinic (NPI 1811948367, Philipsburg, PA); Evangelical Medical Services Organization (NPI 1083412084, Lewisburg, PA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2015
## Record status
- **NPPES last updated:** August 19, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1427444538) · Data from the CMS NPPES public registry.