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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

ALYSSA TJADEN
NPI 1639073604
Nurse Practitioner - Psychiatric/Mental Health in Billings, MT

Active since October 05, 2026
1925 GRAND AVE STE 127, BILLINGS, MT 59102(561) 231-0233(561) 203-3447 Get Directions Write a Review

NPPES record added: October 5, 2026. Verified against the NPPES registry weekly; last sync: October 11, 2026.

About Alyssa Tjaden NPPES

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

ALYSSA TJADEN (NPI 1639073604) is an individual psychiatric/mental health provider in Billings, Montana, licensed in Montana (NUR-APRN-LIC-293992) and active in the NPI registry since October 2026.

NPPES Registry Identity

NPI1639073604
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameALYSSA TJADEN
Location Address1925 GRAND AVE STE 127Billings, MT 59102-2776
Mailing Address2054 Vista Pkwy Ste 400West Palm Beach, FL 33411-6742 · (561) 231-0233 · Fax (561) 203-3447
Phone(561) 231-0233
Fax(561) 203-3447
Sole ProprietorNo
Enumeration DateOctober 5, 2026
NPPES CertifiedOctober 5, 2026
✔ NPI 1639073604 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 MT · NUR-APRN-LIC-293992
1925 GRAND AVE STE 127, Billings, MT 59102
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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.

JOSEPH YERETSIAN, PC
Psychiatry & Neurology (Psychiatry)
1925 GRAND AVE STE 127
BILLINGS, MT 59102
Yellowstone County (406) 206-0800
SMT CARE OF MT, LLC
Orthopaedic Surgery (Orthopaedic Surgery of the Spine)
1925 GRAND AVE STE 127
BILLINGS, MT 59102
Yellowstone County (615) 733-2064
MONTANA ANESTHESIA SERVICES LLC
Anesthesiology
1925 GRAND AVE STE 127
BILLINGS, MT 59102
Yellowstone County (888) 589-8550
CMT CARE OF MT, LLC
Internal Medicine (Cardiovascular Disease)
1925 GRAND AVE STE 127
BILLINGS, MT 59102
Yellowstone County (615) 733-2064
CANDID MONTANA, P.C.
Dentist (Orthodontics and Dentofacial Orthopedics)
1925 GRAND AVE STE 127
BILLINGS, MT 59102
Yellowstone County (860) 481-7631
OMT CARE OF MT, LLC
Orthopaedic Surgery
1925 GRAND AVE STE 127
BILLINGS, MT 59102
Yellowstone County (615) 733-2064

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 Alyssa Tjaden's NPI number?

The NPI number for Alyssa Tjaden is 1639073604. It was assigned to this individual provider in the NPPES registry on October 5, 2026.

Where is Alyssa Tjaden located?

Alyssa Tjaden practices at 1925 Grand Ave Ste 127, Billings, MT 59102. The listed phone number is (561) 231-0233.

What is Alyssa Tjaden's specialty?

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

When was this NPI record last updated?

The NPPES record for Alyssa Tjaden was last updated on October 5, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 days 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.