MARIAH MAINS ARNP
NPI 1457241937
Nurse Practitioner - Acute Care in Cedar Rapids, IA
About Mariah Mains Arnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARIAH MAINS ARNP (NPI 1457241937) is an individual acute care provider in Cedar Rapids, Iowa, licensed in Iowa (H185465) and active in the NPI registry since July 2025. She is enrolled in Medicare PECOS, is affiliated with Mercy Medical Center - Cedar Rapids, and is a graduate of Other (2025).
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 (PECOS)
Mariah Mains Arnp is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mariah Mains reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Cedar Rapids, IA 52403
- Reassigned Medicare billing, Iowa enrollment
- 387 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Medical Center - Cedar Rapids
Acute Care Hospitals · Cedar Rapids, IAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 52401 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
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Mariah Mains's NPI number?
The NPI number for Mariah Mains is 1457241937. It was assigned to this individual provider in the NPPES registry on July 7, 2025.
Where is Mariah Mains located?
Mariah Mains practices at 846 9th Ave SE, Cedar Rapids, IA 52401. The listed phone number is (319) 832-2328.
What is Mariah Mains's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Acute Care, with taxonomy code 363LA2100X.
Is Mariah Mains enrolled in Medicare?
Yes. Mariah Mains is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mariah Mains's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mariah Mains reassigns Medicare benefits to Mercy Medical Center (Cedar Rapids, IA). The 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 Mariah Mains's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mariah Mains accept?
Health plans from Oscar Insurance Company and Wellmark Health Plan of Iowa, Inc. list Mariah Mains 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 Mariah Mains affiliated with any hospitals?
According to CMS data, Mariah Mains is affiliated with Mercy Medical Center - Cedar Rapids.
When was this NPI record last updated?
The NPPES record for Mariah Mains was last updated on July 8, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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.
# Mariah Mains, ARNP · NPI 1457241937
Acute Care physician in Cedar Rapids, Iowa. Individual provider, active in the CMS NPPES registry since July 7, 2025.
## Identity
- **NPI:** 1457241937 (Entity type: Individual)
- **Enumerated:** July 7, 2025
- **Primary specialty:** Nurse Practitioner - Acute Care · taxonomy 363LA2100X
- **State license:** H185465 (Iowa)
- **Sole proprietor:** No
## Practice location
- **Address:** 846 9TH AVE SE, Cedar Rapids, IA 52401-2111
- **Phone:** (319) 832-2328
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Mercy Medical Center (NPI 1669617106, Cedar Rapids, IA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2025
## Record status
- **NPPES last updated:** July 8, 2025
---
Source: [NPI Profile](https://npiprofile.com/npi/1457241937) · Data from the CMS NPPES public registry.