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SEAN MICHAEL OSTENDORF
NPI 1861072845
Counselor - Mental Health in Waterloo, IA

Active since April 13, 2021PECOS EnrolledAccepts Medicare Assignment
3261 UNIVERSITY AVE, WATERLOO, IA 50701(800) 531-4236(319) 483-6661 Get Directions Write a Review

NPPES record last updated: February 15, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Feb 15, 2023, Feb 10, 2022, Apr 13, 2021 (3 updates tracked since 2021).

About Sean Michael Ostendorf NPPES

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

SEAN MICHAEL OSTENDORF (NPI 1861072845) is an individual mental health provider in Waterloo, Iowa and active in the NPI registry since April 2021. He is enrolled in Medicare PECOS and is a graduate of Other (2018).

NPPES Registry Identity

NPI1861072845
Entity TypeIndividualMale
Primary Taxonomy101YM0800X
Provider Legal NameSEAN MICHAEL OSTENDORF
Location Address3261 UNIVERSITY AVEWaterloo, IA 50701-2051
Mailing Address3261 University AveWaterloo, IA 50701-2051 · (800) 531-4236 · Fax (319) 483-6661
Phone(800) 531-4236
Fax(319) 483-6661
Sole ProprietorNo
Medical School CMSOtherGraduated 2018
Enumeration DateApril 13, 2021
Last NPPES UpdateFebruary 15, 20233 updates tracked since enumeration
NPPES CertifiedFebruary 15, 2023
✔ NPI 1861072845 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyCounselor · Mental HealthBehavioral Health & Social Service Providers
Taxonomy Code101YM0800X
Also ListedCounselor · Addiction (Substance Use Disorder)Taxonomy 101YA0400X
3261 UNIVERSITY AVE, Waterloo, IA 50701
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Oscar Insurance Company, UnitedHealthcare, 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

Sean Michael Ostendorf 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 ID9234671983
PECOS Enrollment IDI20240610000842
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 Sean Ostendorf reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Heart And Solutions
27 mi
Mental Health
626 G AVE
Grundy Center, IA 50638
  • Reassigned Medicare billing, Iowa enrollment
  • 22 clinicians in this Medicare group
NPI 1578963377 (800) 531-4236

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

Other Providers at the Same Location NPPES 6

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

ALEXIS TEALE LACHINO LISW
Counselor (Mental Health)
3261 UNIVERSITY AVE
WATERLOO, IA 50701
Black Hawk County (319) 239-2016
BRANDI SCHMITT MS, NCC, TLMHC
Counselor (Mental Health)
3261 UNIVERSITY AVE
WATERLOO, IA 50701
Black Hawk County (319) 290-7586
MS. SAMARAH GREEVES LISW
Counselor (Mental Health)
3261 UNIVERSITY AVE
WATERLOO, IA 50701
Black Hawk County (319) 343-8291
CATHY A ROTTINGHAUS LMSW
Counselor
3261 UNIVERSITY AVE
WATERLOO, IA 50701
Black Hawk County (319) 290-5518
NIKI NICOLE MERCADO LMSW
Social Worker
3261 UNIVERSITY AVE
WATERLOO, IA 50701
Black Hawk County (800) 531-4236
GROWTH & GRACE COUNSELING AND CONSULTING LLC
Counselor (Mental Health)
3261 UNIVERSITY AVE
WATERLOO, IA 50701
Black Hawk County (712) 789-0664

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 Sean Ostendorf's NPI number?

The NPI number for Sean Ostendorf is 1861072845. It was assigned to this individual provider in the NPPES registry on April 13, 2021.

Where is Sean Ostendorf located?

Sean Ostendorf practices at 3261 University Ave, Waterloo, IA 50701. The listed phone number is (800) 531-4236.

What is Sean Ostendorf's specialty?

The primary specialty registered for this NPI is Counselor, specializing in Mental Health, with taxonomy code 101YM0800X.

Is Sean Ostendorf enrolled in Medicare?

Yes. Sean Ostendorf 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 Sean Ostendorf's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Sean Ostendorf reassigns Medicare benefits to Heart And Solutions (Grundy Center, 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 Sean Ostendorf's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Sean Ostendorf accept?

Health plans from Oscar Insurance Company, UnitedHealthcare and Wellmark Health Plan of Iowa, Inc. list Sean Ostendorf 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 Sean Ostendorf was last updated on February 15, 2023. 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.