What ACA marketplace plans are available in Duncan, Oklahoma in 2026?
Duncan, Oklahoma (population 22,958), covering ZIP codes 73533, 73534, 73536 sits in Stephens County, where 28 ACA marketplace plans from 3 insurers are available in 2026 with a benchmark (second-lowest-cost silver) plan at $705 per month for a 40-year-old. 2027 plans for Stephens County are now available.
Updated July 23, 2026 · Reviewed by Jason Burns, Editorial Steward
Reviewed by Heather Fabrizio, Licensed Insurance Agent (NPN 20983651) · reviewed Jul 25, 2026
Three lowest-cost silver plans at age 40
- Medica — Harmony by Medica Silver $0 Copay PCP Visits · $704.13/mo · deductible $3,500 · MOOP $10,450
- Medica — Harmony by Medica Silver Share · $705.30/mo · deductible $3,525 · MOOP $8,850
- Mending Health — MENDING Direct Primary Care Silver 2300 ($0 DPC + $0 PCP + $0 Mental Health) · $747.37/mo · deductible $2,300 · MOOP $10,150
See the Duncan city page with stats and ZIP codes →
Source: PY2026 QHP Landscape, Individual Market Medical (CMS Public Use File, released May 2026).