A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Keith Kosakura’s office at (408) 257-5262 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
8 of 8 plans
Plans whose provider directory lists this clinician
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
Largest Original Medicare bills
Established patient complete exam of visual system
113
$11,625
$101
Photography of the retina
124
$4,002
$31
Short return visit (20+ min)
19
$1,584
$75
Exam of visual field with limited testing
24
$791
$33
Who their Medicare patients are
132 Original Medicare patients in 2024. Average age 77 · Women 60% · Health risk score 0.77. At or below the middle of the specialty; the typical optometry clinician is at 0.97.
Conditions among them: High blood pressure 53% · Cancer 17% · Diabetes 16% · Coronary heart disease 14% · Chronic kidney disease 12% · Atrial fibrillation 12%.
The office billed $42,878, Medicare allowed $30,564 and paid $19,644; for 315 services of 10 kinds.
Original Medicare patients only. A risk score of 1.0 is the average Medicare patient; higher means sicker. Any count under 11 is hidden.
Year by year
Original Medicare by year
2024
132
315
77
0.77
$42,878
$19,644
2023
138
337
77
0.74
$45,021
$21,622
2022
127
319
77
0.66
$39,789
$17,309
2021
153
328
76
0.78
$41,465
$18,043
2020
111
245
75
0.75
$29,999
$13,365
2019
164
346
76
0.79
$42,374
$19,254
2018
164
354
75
0.69
$42,820
$19,987
2017
157
349
75
0.68
$41,114
$18,948
2016
184
388
75
0.75
$45,595
$24,655
2015
182
400
75
0.72
$46,985
$25,914
2014
184
423
75
0.81
$49,730
$27,177
2013
165
398
75
0.80
$44,105
$22,623
Original Medicare only. A service billed for fewer than 11 people in a year is hidden, so the lines can add up to less than the year's total.
See the services billed each year
2023: 5 services
Original Medicare services billed in 2023
Established patient complete exam of visual system
112
$11,582
$102
Photography of the retina
130
$4,231
$32
Return visit (30+ min)
16
$1,712
$107
Exam of visual field with limited testing
42
$1,344
$31
New patient complete exam of visual system
11
$1,235
$112
2022: 3 services
Original Medicare services billed in 2022
Established patient complete exam of visual system
109
$9,786
$85
Photography of the retina
121
$3,892
$30
Exam of visual field with limited testing
40
$1,215
$30
2021: 4 services
Original Medicare services billed in 2021
Established patient complete exam of visual system
113
$10,120
$87
Photography of the retina
138
$4,622
$33
Short return visit (20+ min)
13
$990
$66
Exam of visual field with limited testing
27
$795
$28
2020: 3 services
Original Medicare services billed in 2020
Established patient complete exam of visual system
87
$6,703
$77
Photography of the retina
107
$4,034
$37
Exam of visual field with limited testing
16
$467
$29
2019: 4 services
Original Medicare services billed in 2019
Established patient complete exam of visual system
123
$9,481
$76
Photography of the retina
156
$6,795
$43
Short return visit (20+ min)
15
$1,059
$56
Exam of visual field with limited testing
24
$699
$29
2018: 4 services
Original Medicare services billed in 2018
Established patient complete exam of visual system
118
$9,307
$79
Photography of the retina
152
$7,099
$46
Exam of visual field with limited testing
34
$985
$29
Short return visit (20+ min)
17
$933
$44
2017: 4 services
Original Medicare services billed in 2017
Established patient complete exam of visual system
116
$7,799
$67
Photography of the retina
145
$7,582
$51
Short return visit (20+ min)
19
$1,145
$55
Exam of visual field with limited testing
29
$810
$28
2016: 7 services
Original Medicare services billed in 2016
Photography of the retina
171
$12,043
$69
Established patient complete exam of visual system
104
$7,899
$75
Short return visit (20+ min)
27
$1,425
$51
New patient complete exam of visual system
12
$847
$71
Exam of visual field with limited testing
25
$710
$26
Exam of visual field with extended testing
13
$563
$43
Return visit (30+ min)
11
$489
$44
2015: 7 services
Original Medicare services billed in 2015
Photography of the retina
169
$12,158
$71
Established patient complete exam of visual system
81
$6,259
$77
Short return visit (20+ min)
47
$2,824
$51
New patient complete exam of visual system
14
$1,129
$81
Exam of visual field with extended testing
14
$759
$54
Exam of visual field with limited testing
26
$711
$27
Exam of visual field with intermediate testing
12
$498
$41
2014: 7 services
Original Medicare services billed in 2014
Photography of the retina
174
$13,233
$72
Short return visit (20+ min)
72
$4,578
$57
Established patient complete exam of visual system
55
$4,198
$76
Return visit (30+ min)
15
$1,295
$86
Exam of visual field with extended testing
15
$838
$52
Exam of visual field with limited testing
29
$812
$28
Exam of visual field with intermediate testing
16
$684
$43
2013: 6 services
Original Medicare services billed in 2013
Photography of the retina
158
$10,726
$63
Short return visit (20+ min)
109
$6,230
$52
Return visit (30+ min)
13
$1,099
$85
New patient visit (30+ min)
16
$1,034
$65
Exam of visual field with limited testing
30
$907
$30
Exam of visual field with intermediate testing
14
$694
$43
Money from drug and device companies
$555 in 2025
Industry payments by year
2025
3
10
—None
$555
2024
6
14
—None
$641
2023
2
4
—None
$95
2022
3
12
—None
$510
2021
3
12
—None
$360
2020
3
5
—None
$283
2019
5
13
—None
$374
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.