A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Wendy N Ahn’s office at (650) 947-3937 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
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
33
$3,774
$111
Photography of the retina
34
$1,238
$33
Who their Medicare patients are
49 Original Medicare patients in 2024. Average age 74 · Women 59% · Also on Medicaid 0% · Health risk score 0.68. At or below the middle of the specialty; the typical optometry clinician is at 0.97.
Conditions among them: High blood pressure 47%.
The office billed $13,325, Medicare allowed $10,591 and paid $7,447; for 101 services of 8 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
49
101
74
0.68
$13,325
$7,447
2023
56
109
75
0.60
$14,379
$7,809
2022
49
104
74
0.65
$13,558
$7,219
2021
47
115
74
0.68
$14,769
$8,486
2020
33
65
75
0.74
$8,349
$4,271
2019
43
102
73
0.64
$12,894
$7,899
2018
34
69
74
0.71
$9,018
$5,311
2017
26
54
74
0.69
$6,890
$4,069
2016
26
49
74
1.05
$6,323
$3,894
2015
37
73
74
1.03
$9,545
$6,114
2014
37
65
73
0.71
$8,415
$5,242
2013
28
58
73
0.71
$7,395
$4,694
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: 2 services
Original Medicare services billed in 2023
Established patient complete exam of visual system
30
$3,426
$114
Photography of the retina
42
$1,358
$31
2022: 2 services
Original Medicare services billed in 2022
Established patient complete exam of visual system
32
$3,585
$112
Photography of the retina
37
$1,347
$32
2021: 2 services
Original Medicare services billed in 2021
Established patient complete exam of visual system
34
$3,821
$112
Photography of the retina
36
$1,618
$38
2020: 2 services
Original Medicare services billed in 2020
Established patient complete exam of visual system
22
$2,221
$101
Photography of the retina
26
$1,136
$39
2019: 2 services
Original Medicare services billed in 2019
Established patient complete exam of visual system
35
$4,183
$120
Photography of the retina
38
$1,926
$48
2018: 2 services
Original Medicare services billed in 2018
Established patient complete exam of visual system
20
$2,093
$105
Photography of the retina
25
$1,390
$51
2017: 2 services
Original Medicare services billed in 2017
Established patient complete exam of visual system
15
$1,410
$94
Photography of the retina
21
$1,362
$59
2016: 2 services
Original Medicare services billed in 2016
Established patient complete exam of visual system
18
$1,724
$91
Photography of the retina
19
$1,332
$67
2015: 2 services
Original Medicare services billed in 2015
Established patient complete exam of visual system
26
$2,626
$101
Photography of the retina
26
$1,936
$74
2014: 2 services
Original Medicare services billed in 2014
Established patient complete exam of visual system
24
$2,294
$96
Photography of the retina
24
$1,768
$71
2013: 2 services
Original Medicare services billed in 2013
Established patient complete exam of visual system
21
$1,958
$93
Photography of the retina
20
$1,688
$70
Drugs they prescribed that Part D paid
$13,240
Pharmacies billed $13,240 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 0% of their Part D prescriptions (0 of 40) in 2024. Too few prescriptions to compare fairly with other clinicians.
0 generic and 31 brand-name prescriptions · $13,240 in drug cost.
Part D prescriptions only. The opioid rate is opioid prescriptions as a share of all this clinician's Part D prescriptions; surgeons and pain specialists run higher than others, so it is shown against the same specialty.
Largest Part D drug costs
Restasis
13
$8,226
$633
Year by year
Part D prescribing by year
2024
40
12
0% (0)
78%
$13,240
2023
37
—None
0% (0)
84%
$15,967
2022
19
—None
0% (0)
89%
$14,180
2021
32
—None
0% (0)
88%
$13,869
2020
21
—None
0% (0)
95%
$7,599
2019
27
—None
0% (0)
78%
$14,400
2018
14
—None
0% (0)
100%
$3,874
2017
14
—None
0% (0)
93%
$3,051
2016
18
—None
0% (0)
89%
$3,300
2015
24
—None
0% (0)
46%
$8,576
2014
13
—None
0% (0)
—None
$1,690
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2022: 1 drug
Part D drugs prescribed in 2022
Restasis
13
$13,813
$1,063
2021: 1 drug
Part D drugs prescribed in 2021
Restasis
17
$13,447
$791
2020: 1 drug
Part D drugs prescribed in 2020
Restasis
11
$7,512
$683
2019: 1 drug
Part D drugs prescribed in 2019
Restasis
15
$14,214
$948
Money from drug and device companies
$178 in 2025
Industry payments by year
2025
2
2
—None
$178
2024
3
3
—None
$168
2023
3
3
—None
$73
2022
2
3
—None
$69
2021
2
2
—None
$28
2020
4
5
—None
$98
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.