NPPES file of Aug 9, 2026

Sean Michael Ostendorf

Mental Health Counselor · Waterloo, IA

Sean Michael Ostendorf is a mental health counselor with a practice address in Waterloo, Iowa, and NPI 1861072845, issued on Apr 13, 2021. Check the license with the Iowa board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1861072845
Name
Sean Michael Ostendorf
Primary taxonomy
Mental Health Counselor 101YM0800X
Practice location
3261 University Ave, Waterloo, IA 50701
Phone
(800) 531-4236
Enumerated
Apr 13, 2021
Record last updated
Feb 15, 2023
Fax
(319) 483-6661
Medicare enrollment
Enrolled (PECOS I20240610000842); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest mental health counselor records → All 2,567 in Iowa → Look up another NPI →

Also registered at 3261 University Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Samarah Greeves, LISWMental Health Counselor1316462682
  2. Alexis Lachino, LISWMental Health Counselor1194467803
  3. Niki Mercado, LMSWSocial Worker1396444378
  4. Cathy Rottinghaus, LMSWCounselor1336725092
  5. Brandi Schmitt, MS, NCC, TLMHCMental Health Counselor1205315595

Verify Sean Michael Ostendorf in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich Iowa board licenses this professionCheck the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the Iowa license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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Bills Medicare through one group practice

  1. Heart And SolutionsWaterloo, IA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Sean Michael Ostendorf among 2,567 mental health counselor records in Iowa

Sean Michael Ostendorf is one of 2,567 mental health counselor records with a practice address in Iowa. 14% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2021, is newer than 62% of them.

  • NPI issued2021 · 62% of these records are older, 34% newer
  • In a Medicare fileYes · 14% of these records are
  • In the CMS Doctors and Clinicians fileYes · 22% of these records are
  • Graduated2018 · median 2015 among the 554 with a school on file
  • Record last updated2023 · 41% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 101YM0800X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

72 mental health counselor records list a practice address in Waterloo

They are 72 of the 1,512 NPPES records with a practice address in Waterloo, and 2,567 mental health counselor records in Iowa.

All 2,567 in Iowa → Every provider in Waterloo → Mental Health Counselor nationwide →

The 8 mental health counselor records with the nearest ZIP codes

  1. Jennifer Adams, LMHCWaterloo, IA 507011902334725
  2. Sabrina Dehoet, LMHC, LPCCWaterloo, IA 507011356986707
  3. Rodney DieserWaterloo, IA 507011588035711
  4. Cindy Enyart, LMHCWaterloo, IA 507011659723435
  5. Samarah Greeves, LISWWaterloo, IA 507011316462682
  6. Stacey Hoth, MA, MS,LMHC, NCCWaterloo, IA 507011477188860
  7. Bethea Loeb, LMHCWaterloo, IA 507011063796993
  8. Nikole Pauli, LMHCWaterloo, IA 507011194985721

Common questions

What is Sean Michael Ostendorf's NPI number?

Sean Michael Ostendorf's National Provider Identifier (NPI) is 1861072845, issued on Apr 13, 2021. An NPI identifies a provider in billing; it is not a license.

Where is Sean Michael Ostendorf located?

The NPPES record lists a practice address at 3261 University Ave, Waterloo, IA, 50701. Phone: (800) 531-4236. Providers update this record themselves, so call before visiting.

How can I verify Sean Michael Ostendorf's license?

Search the Iowa board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.