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MARK A MIDTHUN MD LLC
NPI 1740830512
Psychiatry & Neurology - Psychiatry in La Crosse, WI

Active since September 13, 2019
3626 EAST AVE S STE 2A, LA CROSSE, WI 54601(608) 778-1114(608) 778-1147 Get Directions Write a Review

NPPES record last updated: March 30, 2020. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 30, 2020, Sep 13, 2019 (2 updates tracked since 2019).

About Mark A Midthun Md Llc NPPES

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

MARK A MIDTHUN MD LLC (NPI 1740830512) is a healthcare organization registered as a psychiatry in La Crosse, Wisconsin and active in the NPI registry since September 2019. The organization lists Mark A. Midthun, Psychiatrist, as its authorized official.

NPPES Registry Identity

NPI1740830512
Entity TypeOrganization
Primary Taxonomy2084P0800X
Legal Business NameMARK A MIDTHUN MD LLC
Location Address3626 EAST AVE S STE 2ALa Crosse, WI 54601-7221
Mailing AddressW6602 Schilling Rd Unit COnalaska, WI 54650-9343 · (608) 397-5904
Phone(608) 778-1114
Fax(608) 778-1147
Organization SubpartNo
Authorized OfficialMark A. MidthunPsychiatrist · (608) 397-5904
Enumeration DateSeptember 13, 2019
Last NPPES UpdateMarch 30, 20202 updates tracked since enumeration
NPPES CertifiedMarch 30, 2020
✔ NPI 1740830512 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
3626 EAST AVE S STE 2A, La Crosse, WI 54601
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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Quartz.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mark A Midthun Md Llc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to Mark A Midthun MD LLC, which bills Medicare for the services this clinician delivers.

Clinician (1)

Mark Midthun, M.D.
Psychiatry
NPI 1487721791
3626 EAST AVE S STE 2A
La Crosse, WI 54601
(608) 787-6411
✔ PECOS✔ Accepts MedicareSame address

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

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 Mark A Midthun MD LLC's NPI number?

The NPI number for Mark A Midthun MD LLC is 1740830512. It was assigned to this organization in the NPPES registry on September 13, 2019.

Where is Mark A Midthun MD LLC located?

Mark A Midthun MD LLC is located at 3626 East Ave S Ste 2A, La Crosse, WI 54601. The listed phone number is (608) 778-1114.

What is Mark A Midthun MD LLC's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Mark A Midthun MD LLC enrolled in Medicare?

Yes. Mark A Midthun MD LLC is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Mark A Midthun MD LLC?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Psychiatry) reassigns their Medicare billing to Mark A Midthun MD LLC. A 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 the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Mark A Midthun MD LLC accept?

Health plans from Quartz list Mark A Midthun MD LLC 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 Mark A Midthun MD LLC was last updated on March 30, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.