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Winson F Koo, MD

Family Practice · Santa Clara

NPI 1558526004

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
4
1 carrier
Offices
2

Offices

2 locations · Permanente Medical Group Inc · 10,928 clinicians in this group

Looking this up.

Plans that list them

4 plans · 1 carrier

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Koo’s office at (408) 851-1000 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
Kaiser Permanente Dual Complete North P2 (HMO D-SNP)Kaiser PermanenteListedSep 1, 2026
Kaiser Permanente Dual Complete North P23 (HMO D-SNP)Kaiser PermanenteListedSep 1, 2026
Kaiser Permanente Sr Adv Basic Santa Clara (HMO)Kaiser PermanenteListedSep 1, 2026
Kaiser Permanente Sr Adv Enhanced Santa Clara (HMO)Kaiser PermanenteListedSep 1, 2026

Drugs they prescribed that Part D paid

$173,464

Pharmacies billed $173,464 in 2024.

This is pharmacy cost, not the office bill, and not what patients paid.

Opioids were 3% of their Part D prescriptions (85 of 3,171) in 2024. Above the middle of the specialty; the typical family practice clinician is at 2%.

2,897 generic and 247 brand-name prescriptions · $173,464 in drug cost · 80 antibiotic prescriptions to 64 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
Ozempic54$39,981$740
Jardiance23$12,368$538
Spiriva Respimat16$8,862$554
Wixela Inhub27$5,065$188
Terazosin73$4,225$58
See all 68 drugs
Every Part D drug this clinician prescribed
Ozempic54$39,981$740
Jardiance23$12,368$538
Spiriva Respimat16$8,862$554
Wixela Inhub27$5,065$188
Terazosin73$4,225$58
Alvesco29$3,949$136
Atorvastatin195$2,605$13
Tamsulosin126$2,280$18
Pantoprazole51$1,799$35
Losartan143$1,707$12
Lisinopril131$1,589$12
Amlodipine Besylate94$1,475$16
Gabapentin65$1,395$21
Allopurinol92$1,230$13
Furosemide76$1,156$15
Levothyroxine64$1,138$18
Fluticasone Propionate49$909$19
Potassium Chloride20$877$44
Adacel Tdap17$867$51
Atenolol73$813$11
Ipratropium38$805$21
Colchicine46$774$17
Hydrochlorothiazide63$735$12
Simvastatin62$712$11
Rosuvastatin57$665$12
Clopidogrel23$655$28
Albuterol Sulfate Hfa36$652$18
Pravastatin29$646$22
Metformin Hcl Er69$622$9
Famotidine37$605$16
Finasteride37$575$16
Lisinopril-Hydrochlorothiazide38$498$13
Metformin42$483$12
Trazodone29$468$16
Pregabalin28$463$17
Prazosin12$455$38
Fenofibrate22$433$20
Bupropion Xl13$413$32
Hydralazine16$399$25
Losartan-Hydrochlorothiazide34$390$11
Metoprolol34$382$11
Metoprolol39$366$9
Lorazepam25$364$15
Spironolactone27$339$13
Clobetasol Propionate15$331$22
Glipizide Er14$330$24
Hydrocodone-Acetaminophen32$322$10
Omeprazole21$316$15
Ibuprofen22$299$14
Ropinirole27$290$11
Warfarin18$239$13
Glipizide19$218$11
Triamcinolone Acetonide24$217$9
Oxybutynin Chloride Er12$215$18
Alendronate22$206$9
Hydrocortisone15$201$13
Chlorthalidone14$197$14
Sumatriptan14$157$11
Tizanidine14$154$11
Sertraline11$152$14
Ezetimibe12$140$12
Lovastatin12$140$12
Ondansetron Odt12$128$11
Cefadroxil11$116$11
Oxycodone14$103$7
Azithromycin15$96$6
Meloxicam11$79$7
Clonazepam13$77$6

Year by year

Part D prescribing by year
20243,1712983% (85)8%$173,464
20232,6323103% (67)8%$142,581
20222,1863243% (64)9%$83,174
20212,1572814% (84)10%$95,994
20201,9272254% (79)11%$79,696
20191,7802354% (74)12%$72,585
20181,6182304% (69)19%$76,607
20171,6781935% (75)19%$81,289
20161,5531816% (89)23%$74,371
20151,4581976% (86)27%$78,053
20141,1342296% (68)22%$53,713
20131,4452078% (119)23%$69,390

Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.

See the drugs prescribed each year

2023: 61 drugs

Part D drugs prescribed in 2023
Ozempic29$22,051$760
Jardiance15$14,276$952
Wixela Inhub25$4,448$178
Terazosin62$3,438$55
Alvesco30$3,003$100
Humulin N19$2,752$145
Atorvastatin173$2,599$15
Lisinopril130$1,578$12
Tamsulosin82$1,537$19
Pantoprazole41$1,493$36
Losartan119$1,413$12
Gabapentin44$1,112$25
Levothyroxine53$1,104$21
Amlodipine Besylate82$1,035$13
Furosemide56$936$17
Atenolol79$883$11
Allopurinol62$795$13
Hydrochlorothiazide69$766$11
Pravastatin26$705$27
Lisinopril-Hydrochlorothiazide44$601$14
Simvastatin52$584$11
Metformin46$564$12
Colchicine31$561$18
Clobetasol Propionate25$555$22
Fluocinonide13$529$41
Prazosin17$517$30
Hydrocortisone18$503$28
Rosuvastatin38$443$12
Albuterol Sulfate Hfa26$439$17
Hydralazine22$426$19
Glipizide35$416$12
Metoprolol38$412$11
Trazodone27$394$15
Metoprolol26$391$15
Fenofibrate19$387$20
Fluticasone Propionate28$373$13
Pregabalin15$362$24
Metformin Hcl Er40$347$9
Chlorthalidone11$340$31
Finasteride20$310$16
Glipizide Er12$306$26
Famotidine26$286$11
Losartan-Hydrochlorothiazide21$245$12
Veo Insulin15$243$16
Paxlovid (Eua)14$231$17
Ibuprofen17$225$13
Spironolactone18$220$12
Triamcinolone Acetonide22$208$9
Hydrocodone-Acetaminophen22$201$9
Doxazosin Mesylate11$172$16
Alendronate18$172$10
Ropinirole12$171$14
Tramadol18$165$9
Nitrofurantoin Mono-Macro11$146$13
Lovastatin12$140$12
Omeprazole14$138$10
Azithromycin20$137$7
Carvedilol11$128$12
Celecoxib12$115$10
Sulfamethoxazole-Trimethoprim16$99$6
Lorazepam13$94$7

2022: 51 drugs

Part D drugs prescribed in 2022
Wixela Inhub24$4,163$173
Humulin N23$3,081$134
Alvesco33$2,866$87
Terazosin53$2,485$47
Atorvastatin134$1,782$13
Tamsulosin82$1,718$21
Gabapentin29$1,211$42
Lisinopril104$1,207$12
Losartan94$1,124$12
Atenolol85$961$11
Levothyroxine42$929$22
Allopurinol54$919$17
Fluocinonide13$848$65
Hydrochlorothiazide73$806$11
Amlodipine Besylate63$757$12
Prazosin13$692$53
Simvastatin60$680$11
Lisinopril-Hydrochlorothiazide47$630$13
Hydrocortisone23$629$27
Albuterol Sulfate Hfa36$622$17
Colchicine26$545$21
Losartan-Hydrochlorothiazide19$516$27
Metformin41$491$12
Trazodone22$478$22
Glipizide40$465$12
Paxlovid (Eua)29$461$16
Metoprolol20$415$21
Furosemide25$405$16
Metformin Hcl Er38$367$10
Hydralazine21$365$17
Finasteride23$361$16
Metoprolol33$351$11
Fenofibrate11$329$30
Ibuprofen20$313$16
Rosuvastatin26$303$12
Veo Insulin16$281$18
Lovastatin20$261$13
Pantoprazole17$248$15
Ropinirole16$244$15
Fluticasone Propionate16$211$13
Hydrocodone-Acetaminophen24$210$9
Triamcinolone Acetonide21$198$9
Nitrofurantoin Mono-Macro14$185$13
Omeprazole19$180$9
Alendronate17$166$10
Famotidine14$160$11
Tramadol16$150$9
Spironolactone12$147$12
Carvedilol12$140$12
Meloxicam18$138$8
Azithromycin13$91$7

2021: 51 drugs

Part D drugs prescribed in 2021
Alvesco44$3,928$89
Wixela Inhub16$2,324$145
Humulin N18$2,083$116
Atorvastatin146$1,898$13
Terazosin45$1,783$40
Tamsulosin74$1,389$19
Lisinopril106$1,287$12
Losartan89$1,225$14
Atenolol111$1,203$11
Levothyroxine45$1,103$25
Amlodipine Besylate81$999$12
Fentanyl11$919$84
Allopurinol40$890$22
Simvastatin75$860$11
Ventolin Hfa13$723$56
Hydrochlorothiazide63$720$11
Fluocinonide12$617$51
Glipizide49$581$12
Lisinopril-Hydrochlorothiazide42$578$14
Gabapentin27$576$21
Clobetasol Propionate11$551$50
Esomeprazole Magnesium12$521$43
Prazosin11$490$45
Furosemide34$487$14
Hydrocodone-Acetaminophen33$485$15
Metformin42$480$11
Finasteride19$476$25
Hydralazine24$436$18
Omeprazole24$427$18
Losartan-Hydrochlorothiazide12$392$33
Albuterol Sulfate Hfa21$390$19
Metoprolol38$378$10
Trazodone20$357$18
Metformin Hcl Er35$331$9
Fluticasone Propionate26$326$13
Warfarin15$295$20
Rosuvastatin22$257$12
Lovastatin20$250$13
Nitrofurantoin Mono-Macro16$238$15
Pantoprazole11$207$19
Veo Insulin14$205$15
Ibuprofen12$192$16
Zolpidem25$188$8
Ropinirole13$168$13
Hydromorphone11$163$15
Triamcinolone Acetonide16$157$10
Tramadol11$147$13
Famotidine13$140$11
Spironolactone12$115$10
Oxycodone-Acetaminophen11$87$8
Meloxicam12$82$7

2020: 46 drugs

Part D drugs prescribed in 2020
Advair Diskus22$4,786$218
Humulin N18$2,653$147
Alvesco31$2,450$79
Fentanyl18$2,256$125
Atorvastatin141$2,028$14
Terazosin42$1,413$34
Tamsulosin61$1,252$21
Lisinopril92$1,043$11
Atenolol94$976$10
Simvastatin81$930$11
Losartan69$923$13
Levothyroxine34$919$27
Amlodipine Besylate75$889$12
Allopurinol40$785$20
Ventolin Hfa16$771$48
Hydrochlorothiazide52$584$11
Prazosin11$515$47
Lisinopril-Hydrochlorothiazide39$514$13
Hydrocortisone14$467$33
Finasteride19$445$23
Hydrocodone-Acetaminophen23$438$19
Gabapentin16$432$27
Fluticasone Propionate34$427$13
Omeprazole18$425$24
Furosemide31$422$14
Metformin33$401$12
Glipizide34$396$12
Fenofibrate11$358$33
Metformin Hcl Er39$339$9
Ibuprofen18$305$17
Lovastatin24$283$12
Metoprolol33$279$8
Veo Insulin17$234$14
Trazodone16$224$14
Hydralazine17$222$13
Rosuvastatin17$222$13
Warfarin12$180$15
Tramadol16$178$11
Zolpidem20$177$9
Clopidogrel11$176$16
Carvedilol12$140$12
Triamterene-Hydrochlorothiazid12$122$10
Famotidine13$110$8
Ropinirole11$105$10
Lorazepam13$79$6
Meloxicam12$74$6

2019: 39 drugs

Part D drugs prescribed in 2019
Atorvastatin135$2,798$21
Alvesco23$2,124$92
Fentanyl14$1,819$130
Terazosin55$1,777$32
Testosterone11$1,727$157
Humulin N12$1,641$137
Tamsulosin61$1,337$22
Ventolin Hfa26$1,335$51
Allopurinol38$1,123$30
Lisinopril99$1,117$11
Atenolol84$1,055$13
Simvastatin89$1,014$11
Levothyroxine29$843$29
Amlodipine Besylate62$680$11
Losartan51$612$12
Finasteride18$580$32
Lisinopril-Hydrochlorothiazide43$529$12
Prazosin11$515$47
Ranitidine20$504$25
Hydrochlorothiazide42$485$12
Furosemide33$443$13
Gabapentin12$438$36
Hydrocodone-Acetaminophen33$431$13
Omeprazole16$424$27
Ibuprofen24$399$17
Lovastatin31$381$12
Hydralazine14$351$25
Clopidogrel18$344$19
Fluticasone Propionate25$319$13
Glipizide26$298$11
Metformin24$296$12
Metoprolol31$293$9
Metformin Hcl Er33$283$9
Zolpidem19$226$12
Rosuvastatin11$216$20
Triamcinolone Acetonide16$191$12
Triamterene-Hydrochlorothiazid13$132$10
Carvedilol11$128$12
Azithromycin15$115$8

2018: 39 drugs

Part D drugs prescribed in 2018
Lyrica15$9,716$648
Chantix14$6,182$442
Atorvastatin120$2,910$24
Qvar21$2,011$96
Terazosin57$1,498$26
Allopurinol34$1,149$34
Ventolin Hfa22$1,056$48
Tamsulosin38$1,047$28
Losartan57$1,041$18
Lisinopril87$1,025$12
Atenolol70$852$12
Simvastatin70$773$11
Omeprazole19$767$40
Diclofenac11$600$55
Levothyroxine20$580$29
Ranitidine15$535$36
Ibuprofen21$482$23
Gabapentin15$455$30
Hydrocodone-Acetaminophen26$448$17
Trazodone28$435$16
Furosemide29$406$14
Lisinopril-Hydrochlorothiazide34$403$12
Amlodipine Besylate50$399$8
Hydrochlorothiazide33$370$11
Lovastatin31$361$12
Metformin Hcl Er30$356$12
Clopidogrel11$313$28
Fluticasone Propionate24$306$13
Metoprolol29$280$10
Glipizide20$267$13
Hydralazine12$265$22
Metformin23$253$11
Triamcinolone Acetonide11$190$17
Zolpidem15$172$11
Carvedilol13$152$12
Tramadol15$134$9
Azithromycin14$112$8
Triamterene-Hydrochlorothiazid12$111$9
Ciprofloxacin12$87$7

2017: 42 drugs

Part D drugs prescribed in 2017
Lyrica11$6,804$619
Chantix13$5,066$390
Spiriva11$3,777$343
Atorvastatin139$3,555$26
Qvar18$1,440$80
Losartan58$1,386$24
Lisinopril93$1,177$13
Humulin N11$1,114$101
Levothyroxine30$973$32
Simvastatin77$971$13
Atenolol77$964$13
Omeprazole22$947$43
Allopurinol27$945$35
Hydrocodone-Acetaminophen35$903$26
Ventolin Hfa15$894$60
Hydralazine25$752$30
Ibuprofen23$748$33
Tamsulosin16$734$46
Terazosin49$719$15
Prazosin11$615$56
Amlodipine Besylate54$496$9
Ranitidine17$442$26
Clopidogrel14$425$30
Lisinopril-Hydrochlorothiazide33$408$12
Lovastatin37$407$11
Nystop14$405$29
Metformin Hcl Er31$383$12
Famotidine14$341$24
Hydrochlorothiazide30$340$11
Trazodone32$337$11
Quetiapine16$314$20
Furosemide22$303$14
Metformin25$285$11
Glipizide18$247$14
Warfarin12$193$16
Zolpidem14$180$13
Insulin12$179$15
Triamcinolone Acetonide11$158$14
Metoprolol16$140$9
Carvedilol12$133$11
Isosorbide Mononitrate Er11$128$12
Tramadol13$114$9

2016: 44 drugs

Part D drugs prescribed in 2016
Chantix13$4,119$317
Opana Er11$3,711$337
Atorvastatin125$3,416$27
Spiriva Respimat11$2,340$213
Hydrocodone-Acetaminophen36$2,033$56
Tamsulosin21$1,681$80
Losartan51$1,467$29
Simvastatin74$1,286$17
Levothyroxine35$1,254$36
Humulin N12$1,187$99
Omeprazole23$1,166$51
Lisinopril91$1,102$12
Qvar13$1,020$78
Gabapentin11$907$82
Hydralazine16$884$55
Ventolin Hfa20$863$43
Ibuprofen22$787$36
Allopurinol17$732$43
Atenolol60$698$12
Amlodipine Besylate42$628$15
Pravastatin13$510$39
K-Tab Er12$506$42
Proair Hfa13$449$35
Terazosin29$445$15
Clopidogrel12$430$36
Metformin Hcl Er31$411$13
Lovastatin32$379$12
Famotidine14$369$26
Lisinopril-Hydrochlorothiazide32$367$11
Trazodone25$328$13
Furosemide24$321$13
Metformin28$315$11
Glipizide19$282$15
Warfarin15$275$18
Insulin12$265$22
Hydrochlorothiazide23$252$11
Ranitidine11$239$22
Quetiapine11$200$18
Metoprolol20$197$10
Naproxen14$184$13
Insulin14$178$13
Tramadol19$175$9
Zolpidem11$130$12
Azithromycin13$117$9

2015: 38 drugs

Part D drugs prescribed in 2015
Spiriva17$5,549$326
Dulera20$4,856$243
Atorvastatin107$2,924$27
Hydrocodone-Acetaminophen43$2,876$67
Gabapentin13$2,160$166
Tamsulosin27$1,861$69
Losartan48$1,301$27
Humulin N13$1,288$99
Omeprazole21$1,130$54
Simvastatin64$1,110$17
Proair Hfa32$1,074$34
Amlodipine Besylate49$1,033$21
Lisinopril77$957$12
Levothyroxine24$833$35
Ibuprofen26$826$32
Atenolol49$586$12
Clopidogrel11$569$52
Furosemide36$508$14
Famotidine22$496$23
Allopurinol12$480$40
Fluticasone Propionate23$464$20
Metformin38$455$12
Carbidopa-Levodopa11$445$40
Lovastatin24$329$14
Hydrochlorothiazide29$318$11
Trazodone19$314$17
Warfarin18$292$16
Metformin Hcl Er25$292$12
Terazosin20$286$14
Insulin11$273$25
Metoprolol26$232$9
Lisinopril-Hydrochlorothiazide17$208$12
Glipizide18$207$12
Azithromycin16$164$10
Tramadol16$154$10
Triamterene-Hydrochlorothiazid14$150$11
Zolpidem12$113$9
Meloxicam12$90$8

2014: 28 drugs

Part D drugs prescribed in 2014
Spiriva13$3,870$298
Zostavax13$2,405$185
Atorvastatin64$1,702$27
Losartan41$1,187$29
Omeprazole23$1,089$47
Hydrocodone-Acetaminophen43$1,003$23
Simvastatin53$994$19
Tamsulosin16$885$55
Lisinopril67$861$13
Atenolol63$732$12
Amlodipine Besylate33$714$22
Proair Hfa18$552$31
Furosemide35$484$14
Terazosin35$475$14
Lovastatin32$462$14
Famotidine18$377$21
Allopurinol12$369$31
Metformin30$353$12
Fluticasone Propionate15$345$23
Levothyroxine14$320$23
Hydrochlorothiazide29$287$10
Lisinopril-Hydrochlorothiazide21$248$12
Glipizide18$241$13
Ibuprofen11$216$20
Warfarin16$208$13
Metformin Hcl Er14$169$12
Trazodone11$131$12
Metoprolol11$127$12

2013: 37 drugs

Part D drugs prescribed in 2013
Spiriva21$4,576$218
Zostavax17$3,026$178
Gabapentin18$2,356$131
Atorvastatin70$1,875$27
Simvastatin72$1,614$22
Losartan45$1,429$32
Atenolol100$1,118$11
Omeprazole23$1,000$43
Tamsulosin21$997$47
Lisinopril82$985$12
Methadone17$976$57
Hydrocodone-Acetaminophen51$972$19
Qvar13$869$67
Amlodipine Besylate34$780$23
Allopurinol22$748$34
Fluticasone Propionate27$591$22
Levothyroxine23$569$25
Terazosin40$546$14
Famotidine22$492$22
Proair Hfa16$466$29
Metformin36$427$12
K-Tab Er11$419$38
Lisinopril-Hydrochlorothiazide30$383$13
Glipizide23$315$14
Warfarin21$309$15
Naproxen14$302$22
Hydrochlorothiazide27$275$10
Ibuprofen15$245$16
Oxycodone-Acetaminophen13$200$15
Metoprolol15$162$11
Lovastatin13$158$12
Ciprofloxacin19$148$8
Tramadol18$146$8
Trazodone14$141$10
Lorazepam12$140$12
Mirtazapine11$120$11
Zolpidem11$85$8

Professional record

NPI
1558526004
Licence
HI MDR5499
Trained
Pennsylvania State University College of Medicine, 2008
Video visits
Lists video visits
Gender
Male
More record details
Sole proprietor
No
Taxonomy
Family medicine (207Q00000X)
Mailing address
94-104 Manawa Pl Apt 201, Waipahu, HI, 96797
NPI first listed
2008-07-24
NPI last updated
2021-12-15

This is when the NPI record was last certified, not a medical board exam.

This office lists an electronic records connection.