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MARIAH JOHNSON DNP, PMHNP
NPI 1548977309
Nurse Practitioner - Psychiatric/Mental Health in Sigourney, IA

Active since November 01, 2022PECOS EnrolledAccepts Medicare Assignment
23019 HIGHWAY 149, SIGOURNEY, IA 52591(641) 622-2720 Get Directions Write a Review

NPPES record last updated: November 1, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Mariah Johnson Dnp, Pmhnp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MARIAH JOHNSON DNP, PMHNP (NPI 1548977309) is an individual psychiatric/mental health provider in Sigourney, Iowa, licensed in Iowa (G171774) and active in the NPI registry since November 2022. She is enrolled in Medicare PECOS and is a graduate of University Of Iowa, Rj & L Carver College Of Medicine (2022).

NPPES Registry Identity

NPI1548977309
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameMARIAH JOHNSONCredential: DNP, PMHNP
Location Address23019 HIGHWAY 149Sigourney, IA 52591-8341
Mailing Address502 W 2nd StWashington, IA 52353-1931
Phone(641) 622-2720
Sole ProprietorNo
Medical School CMSUniversity Of Iowa, Rj & L Carver College Of MedicineGraduated 2022
Enumeration DateNovember 1, 2022
NPPES CertifiedNovember 1, 2022
✔ NPI 1548977309 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in IA · G171774
23019 HIGHWAY 149, Sigourney, IA 52591
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Wellmark Health Plan of Iowa, Inc..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

Mariah Johnson Dnp, Pmhnp 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.

PECOS PAC ID941678544
PECOS Enrollment IDI20221201000546
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Mariah Johnson reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Keokuk County Health Center
Same address
Critical Access
23019 HIGHWAY 149
Sigourney, IA 52591
  • Reassigned Medicare billing, Iowa enrollment
  • 45 clinicians in this Medicare group
NPI 1376611103 (641) 622-2720

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 52591 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$81.84 typical visit price
range $52.96 – $161.40
Typical copayment $20.46 (range $13.24 – $40.35)
Most-billed visit code 99203
Established Patient
$94.05 typical visit price
range $16.91 – $131.98
Typical copayment $23.51 (range $4.22 – $32.99)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 10

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KEOKUK COUNTY HEALTH CENTER
Clinic/Center (Rural Health)
23019 HIGHWAY 149
SIGOURNEY, IA 52591
Keokuk County (641) 622-2720
DR. ROBERTO PEPE CASTRO MD.
Internal Medicine
23019 HIGHWAY 149
SIGOURNEY, IA 52591
Keokuk County (641) 622-2720
JESSICA WEBB DO
Family Medicine
23019 HIGHWAY 149
SIGOURNEY, IA 52591
Keokuk County (515) 265-4211
KEOKUK COUNTY HEALTH CENTER
General Acute Care Hospital (Critical Access)
23019 HIGHWAY 149
SIGOURNEY, IA 52591
Keokuk County (641) 622-2720
KEOKUK COUNTY HEALTH CENTER
General Acute Care Hospital (Critical Access)
23019 HIGHWAY 149
SIGOURNEY, IA 52591
Keokuk County (641) 622-2720
DENYSE GIPPLE RN
Registered Nurse (Administrator)
23019 HIGHWAY 149
SIGOURNEY, IA 52591
Keokuk County (641) 622-1125
KEOKUK COUNTY HEALTH CENTER
Emergency Medicine
23019 HIGHWAY 149
SIGOURNEY, IA 52591
Keokuk County (641) 622-2720
BRITTNEY EILERS OTD, OTR/L
Occupational Therapist
23019 HIGHWAY 149
SIGOURNEY, IA 52591
Keokuk County (641) 622-1180

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 Johnson's NPI number?

The NPI number for Mariah Johnson is 1548977309. It was assigned to this individual provider in the NPPES registry on November 1, 2022.

Where is Mariah Johnson located?

Mariah Johnson practices at 23019 Highway 149, Sigourney, IA 52591. The listed phone number is (641) 622-2720.

What is Mariah Johnson's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is Mariah Johnson enrolled in Medicare?

Yes. Mariah Johnson 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 organization bills Medicare for Mariah Johnson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mariah Johnson reassigns Medicare benefits to Keokuk County Health Center (Sigourney, 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 Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Mariah Johnson accept?

Health plans from Wellmark Health Plan of Iowa, Inc. list Mariah Johnson 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.

When was this NPI record last updated?

The NPPES record for Mariah Johnson was last updated on November 1, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.