CATHERINE E GRIMSLEY MSN PMHNP-BC
NPI 1609543933
Nurse Practitioner - Psychiatric/Mental Health in Sioux City, IA

Q: What is Catherine Grimsley's NPI number?

The NPI number for Catherine Grimsley is 1609543933. It was assigned to this individual provider in the NPPES registry on August 25, 2021.

Q: What is Catherine Grimsley's specialty?

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

Active since August 25, 2021PECOS EnrolledAccepts Medicare Assignment

4230 HAMILTON BLVD, SIOUX CITY, IA 51104(712) 239-4300(712) 239-2866 Get Directions Write a Review

NPPES record last updated: February 27, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Dec 3, 2025, Aug 25, 2021 (2 updates tracked since 2021).

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About Catherine E Grimsley Msn Pmhnp-bc NPPES

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

CATHERINE E GRIMSLEY MSN PMHNP-BC (NPI 1609543933) is an individual psychiatric/mental health provider in Sioux City, Iowa, licensed in Iowa (G164736) and active in the NPI registry since August 2021. She is enrolled in Medicare PECOS and is a graduate of Other (2021).

NPPES Registry Identity

NPI1609543933

Entity TypeIndividualFemale

Primary Taxonomy363LP0808X

Provider Legal NameCATHERINE E GRIMSLEYCredential: MSN PMHNP-BC

Location Address4230 HAMILTON BLVDSioux City, IA 51104-1137

Mailing Address200 Gold Cir Ste 120Dakota Dunes, SD 57049-5501 · (605) 217-0700 · Fax (605) 217-0701

Phone(712) 239-4300

Fax(712) 239-2866

Sole ProprietorNo

Medical School CMSOtherGraduated 2021

Enumeration DateAugust 25, 2021

Last NPPES UpdateFebruary 27, 20262 updates tracked since enumeration

NPPES CertifiedFebruary 27, 2026

✔ NPI 1609543933 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 · G164736

4230 HAMILTON BLVD, Sioux City, IA 51104

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Catherine E Grimsley Msn Pmhnp-bc 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 ID1456757111

PECOS Enrollment IDI20210903000171

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.

Areas of Expertise CMS Part B claims 3

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.

Assessment of emotional or behavioral problems 96127

Assessment of emotional or behavioral problems involves a thorough evaluation of your feelings, thoughts, and behaviors. It's a process where professionals study patterns over time to identify potential issues like anxiety, depression, or other mental health conditions.

67 services27 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

59 services26 patients

Psychiatric diagnostic evaluation with medical services 90792

A psychiatric diagnostic evaluation with medical services is a comprehensive assessment. It includes a detailed examination of your mental health and physical wellbeing, as well as your personal and family history. This evaluation aids in creating an effective treatment plan.

12 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 51104 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.

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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.

COURTNEY JEAN MARIE RASMUSSEN ARNP

Nurse Practitioner (Family)

4230 HAMILTON BLVD
SIOUX CITY, IA 51104

Woodbury County (712) 239-4300

MRS. MAUREEN JANET FISHER PAC

Physician Assistant (Medical)

4230 HAMILTON BLVD, URGENT CARE NORTH SIDE
SIOUX CITY, IA 51104

Woodbury County (712) 224-5550

DR. JOSEPH ADAM KURTH MD

Family Medicine

4230 HAMILTON BLVD
SIOUX CITY, IA 51104

Woodbury County (712) 239-4300

THOMAS E SCHRYVER MD

Family Medicine

4230 HAMILTON BLVD
SIOUX CITY, IA 51104

Woodbury County (712) 239-4300

JOHN HAFFELE ROBERTS MD

Family Medicine

4230 HAMILTON BLVD
SIOUX CITY, IA 51104

Woodbury County (712) 239-4300

CAROL L ROGE MD

Family Medicine

4230 HAMILTON BLVD
SIOUX CITY, IA 51104

Woodbury County (712) 239-4900

MICHAEL D. HARDER D.O.

Family Medicine

4230 HAMILTON BLVD
SIOUX CITY, IA 51104

Woodbury County (712) 239-4900

TERRY HOWARD MITCHELL MD

Family Medicine

4230 HAMILTON BLVD
SIOUX CITY, IA 51104

Woodbury County (712) 239-4300

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 Catherine Grimsley's NPI number?

The NPI number for Catherine Grimsley is 1609543933. It was assigned to this individual provider in the NPPES registry on August 25, 2021.

Where is Catherine Grimsley located?

Catherine Grimsley practices at 4230 Hamilton Blvd, Sioux City, IA 51104. The listed phone number is (712) 239-4300.

What is Catherine Grimsley's specialty?

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

Is Catherine Grimsley enrolled in Medicare?

Yes. Catherine Grimsley 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.

What insurance does Catherine Grimsley accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Home State Health, Ambetter from Sunflower Health Plan and Avera Health Plans and 4 other insurers list Catherine Grimsley 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 Catherine Grimsley was last updated on February 27, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.