Provider

YEE CHUAN ANG M.D.

Public NPPES listing with taxonomy: Internal Medicine.

Resource details

Medicare status: Confirm directly

Unknown from NPPES

Source: NPPES NPI Registry

NPI: 1104138668

Taxonomy: Internal Medicine (207R00000X)

Source confidence: 58%

Medicare assignment: Unknown from NPPES

Address: 801 N 29TH ST, BILLINGS, MT, 59101

Phone: 406-238-2500

Last verified: May 15, 2026

Verify before you act

Provider verification

Clinicians and care teams from public Medicare or NPI source data. These listings help identify relevant specialties, not guaranteed GLP-1 prescribing or coverage.

Ask whether they work with your specific Medicare plan.
Confirm whether the GLP-1 medication and diagnosis you are asking about are supported.
Ask whether prior authorization, step therapy, or plan documentation is required.
Confirm medical, coverage, pharmacy, and cost details directly before making care decisions.

Source method

What this page proves

Listings are built from public datasets such as NPPES, CMS Care Compare, HRSA health-center files, and SHIP program directories. A listing means the resource appears in a public source; it does not guarantee GLP-1 prescribing, drug coverage, stock, or appointment availability.

What to confirm

This listing is source-backed, but GLP-1 coverage depends on the medication, diagnosis, plan rules, prior authorization, and the resource's current participation.

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