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Yi-Fen I Chen, MD

Internal Medicine · Santa Clara

NPI 1073692711

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

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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. Chen’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

California Medical Board record

Licence A74978 · Current

Licensed to practise in California · since 2001 · expires 2027-06-30 · Indiana University School of Medicine.

No disciplinary actions, convictions, malpractice judgments or citations in this record.

Drugs they prescribed that Part D paid

$25,618

Pharmacies billed $25,618 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 1,072) in 2024. At or below the middle of the specialty; the typical internal medicine clinician is at 1%.

1,025 generic and fewer than 11 brand-name prescriptions · $25,618 in drug cost · 12 antibiotic prescriptions.

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
Spiriva Respimat13$3,943$303
Terazosin21$1,133$54
Atorvastatin94$1,109$12
Lisinopril78$1,034$13
Levothyroxine50$1,023$20
See all 25 drugs
Every Part D drug this clinician prescribed
Spiriva Respimat13$3,943$303
Terazosin21$1,133$54
Atorvastatin94$1,109$12
Lisinopril78$1,034$13
Levothyroxine50$1,023$20
Atenolol85$957$11
Potassium Chloride20$904$45
Hydrochlorothiazide64$724$11
Losartan45$712$16
Amlodipine Besylate48$694$14
Simvastatin51$590$12
Gabapentin17$465$27
Metformin Hcl Er50$422$8
Metformin28$396$14
Alendronate39$382$10
Tamsulosin17$247$15
Clopidogrel12$228$19
Finasteride12$186$15
Metoprolol18$176$10
Fluoxetine12$167$14
Allopurinol16$162$10
Omeprazole12$132$11
Isosorbide Mononitrate Er11$126$11
Glipizide11$122$11
Trazodone11$112$10

Year by year

Part D prescribing by year
20241,0721050% (0)None$25,618
20231,0781080% (0)None$31,575
20221,126114NoneNone$32,534
20211,123112NoneNone$45,054
20201,056122NoneNone$37,623
20191,111123NoneNone$42,115
20181,314137NoneNone$39,848
20171,5681601% (12)None$51,171
20161,8552211% (13)17%$72,231
20152,2652431% (14)None$87,419
20142,9923242% (72)None$122,216
20133,0763153% (89)16%$120,304

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

See the drugs prescribed each year

2023: 26 drugs

Part D drugs prescribed in 2023
Spiriva Respimat15$4,365$291
Alvesco11$1,547$141
Terazosin26$1,536$59
Atorvastatin92$1,417$15
Lisinopril83$1,049$13
Potassium Chloride23$1,036$45
Atenolol97$1,024$11
Amlodipine Besylate56$834$15
Levothyroxine35$779$22
Hydrochlorothiazide68$746$11
Gabapentin23$626$27
Losartan38$570$15
Simvastatin43$499$12
Alendronate36$371$10
Metformin Hcl Er47$364$8
Metformin25$344$14
Trazodone20$247$12
Tamsulosin12$202$17
Fluoxetine13$185$14
Finasteride12$183$15
Allopurinol16$176$11
Latanoprost11$157$14
Isosorbide Mononitrate Er13$150$12
Metoprolol12$142$12
Omeprazole14$140$10
Lisinopril-Hydrochlorothiazide11$105$10

2022: 26 drugs

Part D drugs prescribed in 2022
Pradaxa11$5,148$468
Atorvastatin95$1,349$14
Terazosin28$1,347$48
Potassium Chloride24$1,297$54
Atenolol121$1,249$10
Lisinopril80$1,040$13
Hydrochlorothiazide77$879$11
Levothyroxine35$801$23
Amlodipine Besylate52$707$14
Losartan39$635$16
Simvastatin47$548$12
Gabapentin22$529$24
Alendronate44$458$10
Allopurinol20$312$16
Tamsulosin16$309$19
Metformin Hcl Er42$307$7
Metformin20$257$13
Trazodone19$245$13
Fluoxetine14$203$15
Colchicine11$193$18
Metoprolol12$157$13
Glipizide11$142$13
Lovastatin12$140$12
Furosemide12$130$11
Omeprazole11$109$10
Lisinopril-Hydrochlorothiazide11$105$10

2021: 26 drugs

Part D drugs prescribed in 2021
Pradaxa28$13,656$488
Spiriva Respimat20$5,396$270
Alvesco12$1,552$129
Atenolol164$1,523$9
Terazosin27$1,138$42
Klor-Con M2014$1,075$77
Lisinopril78$997$13
Atorvastatin65$818$13
Hydrochlorothiazide68$760$11
Amlodipine Besylate57$755$13
Levothyroxine37$699$19
Simvastatin46$537$12
Allopurinol23$489$21
Gabapentin18$441$25
Losartan24$367$15
Alendronate35$364$10
Metformin24$326$14
Metoprolol21$312$15
Tamsulosin17$306$18
Metformin Hcl Er33$243$7
Furosemide13$225$17
Omeprazole12$203$17
Famotidine18$202$11
Colchicine13$189$15
Trazodone16$175$11
Lovastatin11$128$12

2020: 24 drugs

Part D drugs prescribed in 2020
Pradaxa20$8,498$425
Spiriva Respimat17$4,232$249
Lisinopril91$1,184$13
Atenolol107$1,127$11
Gabapentin27$1,036$38
Terazosin26$877$34
Levothyroxine25$710$28
Atorvastatin51$682$13
Hydrochlorothiazide56$637$11
Simvastatin53$635$12
Amlodipine Besylate47$589$13
Losartan35$522$15
Furosemide26$397$15
Allopurinol20$392$20
Alendronate37$385$10
Metformin24$333$14
Metoprolol22$328$15
Metformin Hcl Er35$274$8
Trazodone23$254$11
Omeprazole11$248$23
Famotidine22$214$10
Fluoxetine12$210$18
Glipizide14$140$10
Lisinopril-Hydrochlorothiazide11$106$10

2019: 29 drugs

Part D drugs prescribed in 2019
Pradaxa15$7,930$529
Spiriva Respimat22$5,668$258
Klor-Con M2012$1,728$144
Lisinopril110$1,419$13
Atenolol101$1,144$11
Atorvastatin52$1,042$20
Terazosin29$996$34
Gabapentin25$922$37
Alvesco14$913$65
Levothyroxine29$855$29
Hydrochlorothiazide68$774$11
Simvastatin56$661$12
Allopurinol25$657$26
Amlodipine Besylate53$590$11
Alendronate39$423$11
Furosemide23$402$17
Metoprolol22$330$15
Losartan25$319$13
Famotidine16$288$18
Metformin Hcl Er34$272$8
Metformin20$272$14
Trazodone23$254$11
Omeprazole11$238$22
Warfarin13$205$16
Glipizide15$200$13
Fluoxetine11$175$16
Lisinopril-Hydrochlorothiazide17$173$10
Lovastatin13$170$13
Hydralazine11$158$14

2018: 29 drugs

Part D drugs prescribed in 2018
Spiriva Respimat13$3,284$253
Pradaxa13$3,126$240
Lisinopril141$1,719$12
Atenolol136$1,499$11
Atorvastatin65$1,497$23
Gabapentin33$1,432$43
Levothyroxine36$1,078$30
Terazosin43$1,061$25
Simvastatin73$899$12
Fenofibrate14$778$56
Hydrochlorothiazide65$732$11
Famotidine28$710$25
Allopurinol22$654$30
Omeprazole22$564$26
Metformin37$521$14
Amlodipine Besylate66$519$8
Losartan24$461$19
Furosemide24$414$17
Alendronate32$405$13
Metformin Hcl Er31$328$11
Glipizide17$305$18
Tamsulosin17$290$17
Fluoxetine16$267$17
Metoprolol19$265$14
Warfarin17$258$15
Trazodone24$257$11
Lovastatin18$250$14
Lisinopril-Hydrochlorothiazide18$207$11
Isosorbide Mononitrate Er17$198$12

2017: 35 drugs

Part D drugs prescribed in 2017
Spiriva Respimat13$3,503$269
Pradaxa15$3,260$217
Lisinopril169$2,091$12
Atorvastatin78$1,922$25
Gabapentin28$1,836$66
Atenolol148$1,673$11
Levothyroxine47$1,613$34
Fenofibrate15$1,581$105
Simvastatin91$1,322$15
Famotidine32$1,008$32
Losartan31$869$28
Nabumetone21$850$40
Hydrochlorothiazide68$774$11
Omeprazole26$740$28
Allopurinol20$695$35
Amlodipine Besylate79$666$8
Furosemide33$562$17
Metformin37$480$13
Alendronate32$455$14
Hydralazine16$447$28
Terazosin31$442$14
Warfarin31$425$14
Metoprolol29$415$14
Metformin Hcl Er40$414$10
Glipizide24$383$16
Fluoxetine21$352$17
Pantoprazole11$338$31
Pioglitazone14$335$24
Lovastatin21$318$15
Baclofen20$312$16
Triamcinolone Acetonide16$312$19
Hydrocodone-Acetaminophen11$307$28
Trazodone27$300$11
Lisinopril-Hydrochlorothiazide11$142$13
Isosorbide Mononitrate Er11$128$12

2016: 37 drugs

Part D drugs prescribed in 2016
Spiriva Respimat15$3,974$265
Gabapentin40$3,668$92
Pradaxa19$3,055$161
Atorvastatin91$2,524$28
Lisinopril192$2,284$12
Simvastatin117$2,280$19
Atenolol174$2,005$12
Levothyroxine51$1,977$39
Losartan47$1,544$33
Famotidine41$1,517$37
Fenofibrate15$1,502$100
Omeprazole34$1,408$41
Amlodipine Besylate93$1,345$14
Allopurinol26$1,077$41
Qvar13$1,016$78
Hydrochlorothiazide74$832$11
Nabumetone24$822$34
Furosemide47$805$17
Hydralazine17$609$36
Metformin43$553$13
Terazosin37$552$15
Metoprolol42$520$12
Pantoprazole12$475$40
Warfarin33$462$14
Pioglitazone15$452$30
Glipizide32$433$14
Finasteride12$430$36
Metformin Hcl Er41$418$10
Alendronate26$388$15
Fluoxetine19$328$17
Lovastatin22$323$15
Hydrocortisone18$238$13
Triamcinolone Acetonide15$231$15
Trazodone20$224$11
Isosorbide Mononitrate Er19$222$12
Lisinopril-Hydrochlorothiazide14$210$15
Fluticasone Propionate14$191$14

2015: 41 drugs

Part D drugs prescribed in 2015
Spiriva19$6,196$326
Simvastatin193$3,615$19
Lisinopril239$2,896$12
Atenolol241$2,814$12
Gabapentin31$2,584$83
Pradaxa11$2,559$233
Amlodipine Besylate103$2,349$23
Losartan70$2,161$31
Omeprazole43$2,147$50
Levothyroxine55$2,095$38
Atorvastatin61$1,810$30
Qvar21$1,660$79
Famotidine47$1,537$33
Allopurinol26$1,217$47
Hydrochlorothiazide93$1,071$12
Fenofibrate14$1,031$74
Tamsulosin11$827$75
Metformin64$818$13
Fluticasone Propionate36$734$20
Metoprolol64$717$11
Pantoprazole14$692$49
Clopidogrel12$662$55
Furosemide50$657$13
Terazosin45$649$14
Pioglitazone17$643$38
Pravastatin11$640$58
Hydralazine18$630$35
Glipizide45$629$14
Lovastatin42$556$13
Warfarin37$510$14
Metformin Hcl Er43$429$10
Nabumetone13$406$31
Fluoxetine24$380$16
K-Tab Er11$316$29
Alendronate20$288$14
Lisinopril-Hydrochlorothiazide18$261$14
Isosorbide Mononitrate Er21$245$12
Paroxetine12$206$17
Trazodone16$200$12
Hydrocortisone12$177$15
Carvedilol13$115$9

2014: 53 drugs

Part D drugs prescribed in 2014
Spiriva23$7,842$341
Zostavax27$4,995$185
Gabapentin52$4,850$93
Simvastatin244$4,682$19
Atenolol273$3,266$12
Lisinopril264$3,223$12
Omeprazole63$2,771$44
Amlodipine Besylate120$2,641$22
Zetia12$2,452$204
Losartan75$2,306$31
Klor-Con M2015$1,721$115
Qvar19$1,695$89
Famotidine62$1,670$27
Colcrys14$1,644$117
Levothyroxine68$1,606$24
Fluticasone Propionate67$1,553$23
Atorvastatin46$1,434$31
Triamcinolone Acetonide32$1,297$41
Fenofibrate15$1,279$85
Hydrochlorothiazide102$1,196$12
Metformin80$1,060$13
Nabumetone37$1,019$28
Terazosin69$980$14
Tamsulosin19$922$49
Hydralazine20$850$42
Lovastatin63$808$13
Proair Hfa20$805$40
Clopidogrel15$792$53
Hydrocodone-Acetaminophen37$792$21
Pioglitazone22$786$36
Pantoprazole19$778$41
Furosemide49$751$15
Metoprolol65$722$11
Warfarin51$704$14
Glipizide49$650$13
Alendronate42$596$14
Allopurinol22$587$27
Adacel Tdap11$451$41
Acetaminophen-Codeine18$437$24
Metformin Hcl Er40$407$10
Paroxetine16$405$25
Trazodone30$382$13
K-Tab Er11$345$31
Lisinopril-Hydrochlorothiazide22$313$14
Isosorbide Mononitrate Er23$268$12
Fluoxetine17$258$15
Nortriptyline14$251$18
Hydrocortisone15$203$14
Amoxicillin16$169$11
Ciprofloxacin16$152$9
Azithromycin13$151$12
Prednisone11$147$13
Carvedilol14$130$9

2013: 56 drugs

Part D drugs prescribed in 2013
Simvastatin259$5,905$23
Spiriva17$5,513$324
Gabapentin42$4,417$105
Flovent Hfa13$3,494$269
Atenolol281$3,443$12
Zostavax19$3,382$178
Lisinopril265$3,242$12
Omeprazole63$2,974$47
Amlodipine Besylate104$2,514$24
Losartan61$2,184$36
Colcrys20$2,024$101
Levothyroxine88$2,023$23
Qvar21$1,962$93
Fluticasone Propionate75$1,794$24
Famotidine65$1,771$27
Klor-Con M2013$1,475$113
Hydrochlorothiazide126$1,449$11
Fenofibrate15$1,400$93
Tamsulosin26$1,221$47
Metoprolol17$1,218$72
Finasteride11$1,205$110
Metformin89$1,201$13
Atorvastatin43$1,165$27
Pravastatin18$1,127$63
Proair Hfa29$1,121$39
Venlafaxine Hcl Er11$965$88
Pantoprazole22$917$42
Nabumetone28$897$32
Terazosin62$840$14
Furosemide52$791$15
Pioglitazone20$783$39
Hydrocodone-Acetaminophen40$778$19
Warfarin57$765$13
Triamcinolone Acetonide24$749$31
Allopurinol27$746$28
Lovastatin56$706$13
Glipizide43$643$15
Alendronate46$641$14
Acetaminophen-Codeine21$614$29
Metoprolol52$606$12
Trazodone46$591$13
Sertraline12$510$42
Hydralazine13$500$38
Nortriptyline18$436$24
K-Tab Er14$345$25
Oxycodone-Acetaminophen18$331$18
Isosorbide Mononitrate Er27$315$12
Paroxetine15$273$18
Lisinopril-Hydrochlorothiazide18$251$14
Fluoxetine16$244$15
Ciprofloxacin25$234$9
Metformin Hcl Er21$206$10
Azithromycin11$143$13
Carvedilol15$135$9
Citalopram Hbr11$131$12
Zolpidem13$92$7

Professional record

NPI
1073692711
Licence
CA A74978California A74978: Current · expires 2027-06-30
Trained
Indiana University School of Medicine, 1998
Gender
Female
More record details
Sole proprietor
No
Medicaid ID
CA 00A749780
Taxonomy
Internal medicine (207R00000X)
Mailing address
1800 Harrison St Fl 7, Oakland, CA, 94612
NPI first listed
2006-11-03
NPI last updated
2022-02-16
NPI record certified
2022-02-16

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

This office lists an electronic records connection.