Before you start

A valid ARC (Gold Card counts) — NHI eligibility is tied to it
Either an employer who enrols you from your first day, OR 6 months of continuous residence (one trip abroad under 30 days allowed; days outside are deducted)
Private or travel insurance to bridge the 6-month gap if you're not employer-enrolled (e.g. SafetyWing, Cigna Global)

Step-by-step

1
Bridge the gap before you're eligible
If no employer is enrolling you on day 1, you cannot join NHI until 6 months of continuous residence. Carry private/travel insurance (SafetyWing, Cigna Global, or a local plan) for that window — out-of-pocket care without NHI is far pricier, though still cheaper than in most Western countries.
OnlineWho: YouDay 1 until NHI eligibility~US$45-150/mo private insurance
2
Get enrolled in NHI
Employed: your employer (the 投保單位) registers you from your start date as a Category 1 insured person — nothing for you to do. Not employed (Gold Card freelancer, dependent): after 6 months' residence, enrol in person at your district household-registration / NHIA office as a Category 6 'regional population' insured person.
Via employerWho: Employer (employees) / You (self-enrol via NHIA office)Day 1 (employed) or after 6 months (others)See premiums below
3
Collect your NHI card (健保卡)
You're issued a chip NHI card (健保卡), the single card that unlocks all NHI care. Every clinic, hospital and pharmacy swipes it. Carry it always; replacements cost ~NT$200. Employees get it via the employer; self-enrollees collect it at the NHIA office.
In personWho: You / employer~1-2 weeks after enrolmentCard NT$200 (reissue)
4
See a doctor — walk-in or book online
No GP gatekeeper: walk into a neighbourhood clinic (診所) or register for hospital outpatient online/by app (most major hospitals have English booking). Bring your NHI card; pay only the small copay. For English-speaking care, use the International Medical Service Centers at Taipei Veterans General, NTU Hospital, or Taipei Medical University Hospital.
Mobile appWho: YouSame day (clinics) / days (hospital specialists)Clinic copay ~NT$50; ER copay up to ~NT$750

Documents you’ll need

ARC (Gold Card or other resident certificate)
Passport
Proof of 6 months' continuous residence (if self-enrolling, not employed)
Employment contract / employer enrolment (Category 1 employees)
NHI card (健保卡) — required at every visit
Local bank account or ATM for premium auto-debit (self-paid categories)

Things most newcomers don’t know

Employment flips a 6-month wait into day-1 coverage.

An employed ARC holder is enrolled by the employer from their first working day; an unemployed/Gold Card freelancer must wait 6 months of continuous residence. That gap is the single biggest planning item — line up private cover or time your enrolment around a job start.

Source: NHIA — Foreign Nationals with ARC

There's no GP gatekeeper — and a tiered copay nudges you to clinics first.

You can self-refer to almost any specialist, but walking into a medical center without a referral costs ~NT$420 vs ~NT$50-170 at a clinic or with a referral. For routine issues, start at a neighbourhood 診所; it's faster and cheaper.

Source: NHIA — Copayment

Use the hospital International Medical Service Centers for English care.

Taipei Veterans General, NTU Hospital and Taipei Medical University Hospital run dedicated English-speaking centers that handle registration, appointments and a facilitator — far smoother than navigating a general outpatient desk in Mandarin. Dental and routine care are world-class and cheap, which is why Taiwan draws dental tourists.

Source: TVGH International Medical Service Center

Common mistakes to avoid

Assuming you can join NHI on arrival — non-employed ARC holders wait 6 months, so don't go uninsured in the gap
Letting your ARC expire — NHI coverage lapses with it; renew the ARC early
Going straight to a big medical center without a referral and paying the ~NT$420 copay for something a clinic handles for ~NT$50
Forgetting your NHI card (健保卡) — without it you pay full out-of-pocket and have to claim back
Confusing emergency numbers — 119 for ambulance/fire, 110 for police