A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Ong’s office at (408) 739-6000 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
Return visit (30+ min)
120
$17,247
$98
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
29
$4,549
$157
Short return visit (20+ min)
56
$3,777
$59
Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's
31
$538
$14
Who their Medicare patients are
162 Original Medicare patients in 2024. Average age 74 · Women 69% · Also on Medicaid 9% · Health risk score 0.87. At or below the middle of the specialty; the typical internal medicine clinician is at 1.76.
The office billed $103,992, Medicare allowed $45,729 and paid $31,885; for 349 services of 17 kinds; $2,101 of it was for drugs given in the office and $29,785 for care.
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
162
349
74
0.87
$103,992
$31,885
2023
153
313
77
0.94
$90,003
$31,314
2022
193
429
76
1.20
$110,416
$39,188
2021
117
277
76
1.19
$66,707
$24,743
2020
37
59
74
1.27
$12,709
$4,264
2016
413
1,141
73
2.94
$355,423
$101,887
2015
222
475
74
2.55
$147,766
$44,842
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
Return visit (30+ min)
103
$15,480
$104
Short return visit (20+ min)
71
$6,141
$72
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
29
$4,627
$160
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage
11
$834
$76
Administration of influenza virus vaccine
11
$416
$38
2022: 5 services
Original Medicare services billed in 2022
Short return visit (20+ min)
124
$13,266
$73
Return visit (30+ min)
80
$12,109
$107
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
29
$4,585
$158
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage
23
$1,616
$70
Administration of influenza virus vaccine
24
$906
$38
2021: 6 services
Original Medicare services billed in 2021
Short return visit (20+ min)
83
$10,095
$73
Return visit (30+ min)
31
$4,502
$115
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
25
$3,600
$144
Initial hospital care with moderate level of medical decision making at least 75 minutes
13
$2,264
$174
Influenza vaccine split virus, preservative free
11
$714
$65
Administration of influenza virus vaccine
12
$259
$22
2020: 1 service
Original Medicare services billed in 2020
Short return visit (20+ min)
22
$1,454
$63
2016: 6 services
Original Medicare services billed in 2016
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes
246
$57,332
$83
Initial hospital care with moderate level of medical decision making at least 75 minutes
116
$19,199
$160
Hospital discharge day management, more than 30 minutes
161
$14,130
$87
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes
88
$7,124
$58
Initial hospital observation care per day, typically 70 minutes
12
$1,803
$150
Hospital observation care on day of discharge
12
$711
$59
2015: 5 services
Original Medicare services billed in 2015
Subsequent hospital care with moderate levelof medical decision making at least 50 minutes
89
$19,096
$85
Initial hospital care with moderate level of medical decision making at least 75 minutes
73
$12,551
$165
Hospital discharge day management, more than 30 minutes
63
$5,545
$88
Subsequent hospital care with moderate levelof medical decision making at least 35 minutes
38
$3,834
$59
Hospital observation care on day of discharge
17
$996
$59
Medicaid work
$288 in 2022
Medicaid paid $288 for 16 billed services this clinician did in 2022, up to 15 people in a month for one service.
Medicaid and CHIP claims where this clinician did the service, fee-for-service and managed care together. Any month with fewer than 11 patients is hidden, so small Medicaid practices undercount.
Largest Medicaid services in 2022
Short return visit (20+ min)
16
$288
Medicaid work by year
2022
16
1
15
$288
2019
33
1
14
$0
See the largest Medicaid services in earlier years
2019
Largest Medicaid services in 2019
Short return visit
33
$0
Drugs they prescribed that Part D paid
$81,291
Pharmacies billed $81,291 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 1% of their Part D prescriptions (16 of 1,218) in 2024. Above the middle of the specialty; the typical internal medicine clinician is at 1%.
1,099 generic and fewer than 11 brand-name prescriptions · $81,291 in drug cost · 33 antibiotic prescriptions to 27 people.
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
Eliquis
17
$9,033
$531
Atorvastatin
122
$1,520
$12
Levetiracetam
12
$756
$63
Amlodipine Besylate
48
$529
$11
Albuterol Sulfate Hfa
18
$505
$28
See all 31 drugs
Every Part D drug this clinician prescribed
Eliquis
17
$9,033
$531
Atorvastatin
122
$1,520
$12
Levetiracetam
12
$756
$63
Amlodipine Besylate
48
$529
$11
Albuterol Sulfate Hfa
18
$505
$28
Losartan
42
$492
$12
Tamsulosin
24
$358
$15
Lisinopril
29
$358
$12
Trazodone
15
$328
$22
Sertraline
24
$321
$13
Gabapentin
23
$311
$14
Fluticasone Propionate
24
$298
$12
Diclofenac
11
$293
$27
Omeprazole
24
$284
$12
Levothyroxine
26
$284
$11
Metformin
31
$267
$9
Alendronate
32
$254
$8
Metoprolol
19
$250
$13
Atenolol
20
$248
$12
Pantoprazole
16
$236
$15
Allopurinol
19
$235
$12
Hydroxyzine
16
$221
$14
Simvastatin
31
$199
$6
Zolpidem
24
$150
$6
Rosuvastatin
20
$147
$7
Lorazepam
20
$143
$7
Famotidine
14
$114
$8
Triamcinolone Acetonide
11
$91
$8
Hydrochlorothiazide
17
$65
$4
Dicyclomine
12
$64
$5
Furosemide
15
$36
$2
Year by year
Part D prescribing by year
2024
1,218
201
1% (16)
—None
$81,291
2023
1,336
172
2% (22)
—None
$122,935
2022
1,295
175
3% (38)
7%
$92,863
2021
1,090
205
1% (15)
—None
$73,007
2020
2,304
368
2% (48)
12%
$103,584
2019
3,580
463
6% (214)
13%
$159,274
2018
2,542
444
7% (164)
18%
$115,135
2017
1,322
263
6% (75)
—None
$62,100
2016
337
139
5% (16)
21%
$23,505
2015
192
73
6% (12)
—None
$7,894
2014
223
55
8% (18)
—None
$9,329
2013
86
24
—None
20%
$3,132
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.