The optical shops follow the MD and OD listings.  If they have an OD who does eye exams, please check to make sure they are on the list.  
Otherwise, you may not get full coverage for an eye exam.
Includes any Walmart/America's Best/Visionworks/Shopko 
Billings
R. W. Anderson OD Shopko Optical 905 S. 24th St. W (406) 652-7737
R. R. Gaskill OD Ophthalmic Assoc. 1232 N. 30th St. #100 (406) 256-6000
John Gingrich OD Shopko Eyecare #4106 905 S. 24th St. W
Douglas Gratwohl OD Shopko Optical #4106 905 S. 24th St. W (406) 652-7737
Sarah Q. Kirkpatrick OD 795 King Park Drive #2 (406) 656-1565
Bart Lotton OD 1649 Main Street (406) 254-6514
Jessica L. Peel OD 1331 24th Street West (406) 656-5846
Kerry Sanchez OD Billings Eyecare Assoc. 1445 Ave. B (406) 259-2567
Ruben Sanchez OD Billings Eyecare Assoc. 1445 Ave. B (406) 259-2567
Michael B. Wardell OD 1331B 24th Street West (406) 656-9857
Michael B. Wardell OD 1005 24th St. West #8 (406) 281-8480
Eyemart Express 795 Kings Park Dr. #3 (406) 656-1565
Shopko Optical #4106 905 S. 24th St. W (406) 652-7297
Vision Optical 1331 24th Street West (406) 656-9857
Vision Center in Walmart 2525 King Ave. (406) 655-8275
Vision Center in Walmart 1649 Main Street (406) 254-6514
Bozeman
Chad J. Krezelok OD 1500 North 7th Avenue (406) 585-8153
Philip J. Owsley OD 1500 North 7th Avenue (406) 585-8153
Sperry, Jeffrey B. OD 2825 W. Main #5D (406) 587-1212
Vision Center in Walmart #2084 1500 North 7th Avenue (406) 585-3758
Butte
Anthony L. Baumgarner OD 800 Sampson (406) 494-1900
Richard Mitchell OD 3901 Harrison Avenue  (406) 494-0804
Vision Center in Walmart 3901 Harrison Avenue  (406) 494-0804
Florence
Great Falls
Shopko Optical 301 Northwest By Pass (406) 727-9682
Helena
Shopko Optical 3101 Montana Avenue (406) 443-8860
Walmart Vision Center 2750 Prospect Avenue (406) 495-8591
Kalispell
Podraza, Malgorzata OD 555 S. Foys Lake Drive (847) 302-3201
Shopko Optical 1370 Hwy 2 East (406) 257-1274
Laurel (Billings)
Ronald Lee Benner OD So. Montana Optometric Center 210 First Avenue (406) 628-8668
OD Walmart #4412 101 Bernhardt Rd. (406) 628-1767
OD Walmart #4412 101 Bernhardt Rd. (406) 628-1767
So. Montana Optometric Center 210 First Avenue (406) 628-8668
Livingston
Jamie Barney OD Eyecare Professionals 305 West Park St. (406) 222-0250
Missoula
George A. Stern MD 1200 S. Reserve St. #H (406) 543-9200
Heidi Brott OD Walmart 4000 Hwy. 93 South (406) 251-3679
Kristina Buster OD   3555 Mullan Road (406) 829-8516
Janna T. Greenwell OD Walmart #3259 3555 Mullan Road (406) 829-8516
Janna T. Greenwell OD 11225 Windermere Dr. (406) 829-8516
William E. Thomas OD 2106 Oxford St. (406) 549-2541
LensCrafters Southgate Mall-2901 Brook St. (406) 549-9078
Shopko 2510 South Reserve St. (406) 721-4646
Vision Center in Walmart 4000 Hwy. 93 South (406) 251-3679
Walmart #3259 3555 Mullan Road (406) 829-8516
Polson
Jeffrey D. Heninger OD 410 1st Street East Suite A (406) 883-4355
Vision Center In Walmart $2607 36318 Memory Lane (406) 883-2173