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MELISSA DAWN WILLIAMSON
NPI 1801734611
Nurse Practitioner - Psychiatric/Mental Health in Butte, MT

Active since March 23, 2026PECOS EnrolledAccepts Medicare Assignment

NPPES record last updated: March 23, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Melissa Dawn Williamson NPPES

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

MELISSA DAWN WILLIAMSON (NPI 1801734611) is an individual psychiatric/mental health provider in Butte, Montana, licensed in Montana (NUR-APRN-LIC-287031) and active in the NPI registry since March 2026. She is enrolled in Medicare PECOS and is a graduate of Other (2025).

NPPES Registry Identity

NPI1801734611
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameMELISSA DAWN WILLIAMSON
Location AddressPO BOX 4832Butte, MT 59702-4832
Mailing AddressPo Box 4832Butte, MT 59702-4832 · (406) 498-8311
Phone(406) 498-8311
Sole ProprietorNo
Medical School CMSOtherGraduated 2025
Enumeration DateMarch 23, 2026
NPPES CertifiedMarch 23, 2026
✔ NPI 1801734611 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-287031
PO BOX 4832, Butte, MT 59702
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Melissa Dawn Williamson 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 ID446720437
PECOS Enrollment IDI20260601001034
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 59702 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$87.97 typical visit price
range $56.81 – $172.26
Typical copayment $21.99 (range $14.20 – $43.06)
Most-billed visit code 99203
Established Patient
$100.16 typical visit price
range $18.24 – $140.32
Typical copayment $25.04 (range $4.56 – $35.08)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Melissa Williamson's NPI number?

The NPI number for Melissa Williamson is 1801734611. It was assigned to this individual provider in the NPPES registry on March 23, 2026.

Where is Melissa Williamson located?

Melissa Williamson practices at PO Box 4832, Butte, MT 59702. The listed phone number is (406) 498-8311.

What is Melissa Williamson's specialty?

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

Is Melissa Williamson enrolled in Medicare?

Yes. Melissa Williamson 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.

When was this NPI record last updated?

The NPPES record for Melissa Williamson was last updated on March 23, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months 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.