Medigap in ZIP code 98611, Castle Rock area

98611 is in Cowlitz County, where 15 insurers sell Medicare Supplement plans: 15 sell Plan G and 14 sell Plan N.

County: Cowlitz
Closest community: Castle Rock
Medicare clinicians in 98611: 11
Nearest hospital: 10 mi

CMS lists 11 Medicare clinicians practicing at addresses in 98611; 3 may not always accept Medicare assignment. Practices here include Northwest Center for Sports Medicine and Physical Therapy Inc. and Cowlitz Family Health Center. Counting everything within 8 miles of the ZIP's center: 11 clinicians, 27.3% sometimes declining assignment (statewide 4.5%). Nearest general hospital: PeaceHealth St. John Medical Center in Longview, about 10 miles. Nearest Medicare-certified nursing home: Beacon Hill Rehabilitation, about 9 miles (5 of 5 stars).

Medigap plans sold in 98611

Cowlitz County line-up. Full list: Castle Rock. OIC chart, October 8, 2026.
Plan	Insurers	Who
Plan G	15	Bankers Reserve Life, First Health Life & Health, GPM Health & Life, HumanaDental, Insurance Company of North America, Medco Containment Life and more
Plan N	14	Bankers Reserve Life, First Health Life & Health, GPM Health & Life, HumanaDental, Insurance Company of North America, Medco Containment Life and more
High-deductible Plan G	6	HumanaDental, Insurance Company of North America, Premera, United American, United World Life (Mutual of Omaha), Washington National
Plan A	14	Bankers Reserve Life, First Health Life & Health, GPM Health & Life, HumanaDental, Insurance Company of North America, Medco Containment Life and more
Plan K	2	Regence BlueShield, UnitedHealthcare (AARP)
Plan F	13	Bankers Reserve Life, First Health Life & Health, GPM Health & Life, HumanaDental, Insurance Company of North America, Medco Containment Life and more

Source: CMS Doctors and Clinicians file.
Specialty in 98611	Clinicians
Physical therapy	7

Hospitals near 98611

Straight-line distance from the town center. Source: CMS Hospital General Information.
Hospital	Distance	Type	CMS overall rating
PeaceHealth St. John Medical Center Longview	10 mi	Acute care	4 of 5 stars
Providence Centralia Hospital Centralia	30 mi	Acute care	3 of 5 stars
Arbor Health Morton Hospital Morton	36 mi	Critical access	not rated

Communities near 98611

Castle Rock (2 mi)
Vader (7 mi)
Lexington (8 mi)
Ryderwood (8 mi)
Longview Heights (9 mi)

Neighboring ZIP codes: 98645, 98593, 98581, 98632, 98626, 98591.

Common questions

Which insurers sell Medigap Plan G in 98611?

15 insurers sell Plan G to Cowlitz County residents (OIC chart current as of October 8, 2026).

How many Medigap insurers sell in 98611?

15, the Cowlitz County line-up.