JOHN ERNST MS
NPI 1740355395
Counselor - Professional in Waukesha, WI
About John Ernst Ms NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN ERNST MS (NPI 1740355395) is an individual professional provider in Waukesha, Wisconsin, licensed in Wisconsin (1549-125) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
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)
John Ernst Ms is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show John Ernst reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
West Allis, WI 53227
- Reassigned Medicare billing, Wisconsin enrollment
- 16 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.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WAUKESHA, WI 53188
WAUKESHA, WI 53188
WAUKESHA, WI 53188
WAUKESHA, WI 53188
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 John Ernst's NPI number?
The NPI number for John Ernst is 1740355395. It was assigned to this individual provider in the NPPES registry on November 21, 2006.
Where is John Ernst located?
John Ernst practices at 721 American Ave Suite 501, Waukesha, WI 53188. The listed phone number is (262) 928-2396.
What is John Ernst's specialty?
The primary specialty registered for this NPI is Counselor, specializing in Professional, with taxonomy code 101YP2500X.
Is John Ernst enrolled in Medicare?
Yes. John Ernst is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for John Ernst's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Ernst reassigns Medicare benefits to Stress Management & Mental Health Clinics (West Allis, WI). 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 John Ernst's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Ernst accept?
Health plans from Anthem Blue Cross and Blue Shield, CareSource (Common Ground Healthcare), HealthPartners, Network Health and Quartz and 1 other insurer list John Ernst 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 John Ernst was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# John Ernst, MS · NPI 1740355395
Professional provider in Waukesha, Wisconsin. Individual provider, active in the CMS NPPES registry since November 21, 2006.
## Identity
- **NPI:** 1740355395 (Entity type: Individual)
- **Enumerated:** November 21, 2006
- **Primary specialty:** Counselor - Professional · taxonomy 101YP2500X
- **State license:** 1549-125 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 721 AMERICAN AVE, SUITE 501, Waukesha, WI 53188-5071
- **Phone:** (262) 928-2396 · **Fax:** (262) 544-1213
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Stress Management & Mental Health Clinics (NPI 1003928391, West Allis, WI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 8, 2007
- **Other identifiers:** Medicaid 40989900 (WI)
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Source: [NPI Profile](https://npiprofile.com/npi/1740355395) · Data from the CMS NPPES public registry.