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Chau C Chien, MD

Neurology · San Francisco

NPI 1578503462

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
9
1 carrier
Office
1
Since medical school
44 years
Graduated 1982

Offices

1 location

Looking this up.

Plans that list them

9 plans · 1 carrier

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Chien’s office at (415) 876-4030 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
Alignment Health BreathEasy (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Clarity (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Harmony (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes CalPlus (HMO C-SNP)Alignment Health PlanListedOct 3, 2026
Alignment Health Heart & Diabetes Care (HMO C-SNP)Alignment Health PlanListedSep 28, 2026
Alignment Health Heart & Diabetes Choice (HMO C-SNP)Alignment Health PlanListedSep 28, 2026
Alignment Health Honor+ Plan (HMO)Alignment Health PlanListedOct 3, 2026
Alignment Health My Choice CalCare (HMO)Alignment Health PlanListedOct 3, 2026

California Medical Board record

Licence A45801 · Current

Licensed to practise in California · since 1989 · expires 2028-12-31 · Autonomous University of Ciudad Juarez School of Medicine.

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

School, training and certification

What this clinician told their state board, medical school and everything before it. Only some states publish this, so nothing here means the state does not say, not that there was no training or certification.

Specialty certification

  • American Board of Psychiatry and Neurology - Neurology

Original Medicare doctor bills

$13,629

Medicare paid this office $13,629 for 73 people.

This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.

Largest Original Medicare bills
Return visit (30+ min)38$6,007$94
New patient visit (60+ min)21$4,100$195
Short return visit23$1,602$46

Who their Medicare patients are

73 Original Medicare patients in 2024. Average age 81 · Under 65 0% · 85 and older 33% · Women 62% · Also on Medicaid 78% · Health risk score 1.64. Above the middle of the specialty; the typical neurology clinician is at 1.61.

Conditions among them: High blood pressure 75% · Diabetes 59% · Dementia 36% · Chronic kidney disease 30% · Atrial fibrillation 23% · Depression 23% · Stroke 21% · COPD 18% · Heart failure 15%.

The office billed $27,660, Medicare allowed $20,890 and paid $13,629; for 135 services of 7 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
202473135811.64$27,660$13,629
2023129246801.37$49,490$25,436
2022166348791.32$69,930$36,847
2021168401791.32$91,735$43,129
2020150395791.55$100,260$37,158
2019258616791.24$201,275$68,136
2018278721771.38$244,385$80,356
2017293690771.39$231,940$74,132
2016267636771.26$208,130$70,829
2015295707771.35$195,711$74,935
2014307721771.22$203,681$76,947
2013339818771.42$228,208$82,690

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)69$10,734$101
New patient visit (60+ min)18$3,406$189
Short return visit35$3,136$46
Assessment of and care planning for patient with impaired thought processing, typically 60 minutes11$2,720$247
New patient visit (45+ min)16$2,099$131

2022: 7 services

Original Medicare services billed in 2022
Return visit (30+ min)92$16,334$107
New patient visit (45+ min)35$4,979$142
Short return visit50$3,881$46
Assessment of and care planning for patient with impaired thought processing, typically 60 minutes15$3,130$209
New patient visit (60+ min)13$2,636$203
Long return visit (40+ min)15$2,361$157
Short return visit (20+ min)11$848$77

2021: 7 services

Original Medicare services billed in 2021
Return visit (30+ min)74$12,690$116
New patient visit (45+ min)66$10,150$154
Short return visit55$5,537$47
Muscle electrical test19$4,000$105
Nerve test19$3,617$190
Long return visit (40+ min)15$2,270$151
Short return visit (20+ min)20$2,155$86

2020: 6 services

Original Medicare services billed in 2020
Return visit (30+ min)79$9,966$88
New patient visit (45+ min)52$7,703$148
Muscle electrical test27$5,773$100
Nerve test27$5,537$191
Short return visit47$4,189$40
Short return visit (20+ min)23$1,546$64

2019: 6 services

Original Medicare services billed in 2019
Return visit (30+ min)133$20,338$90
New patient visit (45+ min)126$16,997$135
Nerve test65$12,885$181
Muscle electrical test65$12,710$90
New patient visit (60+ min)13$2,214$170
Short return visit (20+ min)25$1,629$63

2018: 6 services

Original Medicare services billed in 2018
New patient visit (45+ min)140$20,084$143
Return visit (30+ min)140$18,895$90
Nerve test90$17,493$188
Muscle electrical test90$16,180$87
Short return visit (20+ min)50$4,291$65
Long return visit (40+ min)11$1,394$127

2017: 5 services

Original Medicare services billed in 2017
New patient visit (45+ min)154$20,507$133
Return visit (30+ min)137$16,934$84
Nerve test81$15,382$181
Muscle electrical test81$14,365$85
Short return visit (20+ min)36$2,933$60

2016: 5 services

Original Medicare services billed in 2016
New patient visit (45+ min)140$20,464$146
Return visit (30+ min)139$17,120$91
Nerve test71$13,717$188
Muscle electrical test73$13,526$90
Short return visit (20+ min)44$4,072$67

2015: 6 services

Original Medicare services billed in 2015
New patient visit (45+ min)149$22,081$148
Return visit (30+ min)163$17,605$90
Short return visit (20+ min)99$12,218$68
Muscle electrical test51$9,573$90
Nerve test46$9,155$191
Initial hospital care with moderate level of medical decision making at least 75 minutes11$1,971$179

2014: 6 services

Original Medicare services billed in 2014
New patient visit (45+ min)150$22,614$151
Return visit (30+ min)154$16,692$96
Short return visit (20+ min)104$13,091$69
Muscle electrical test56$10,190$91
Nerve test54$9,750$181
Initial hospital care with moderate level of medical decision making at least 75 minutes11$1,987$181

2013: 5 services

Original Medicare services billed in 2013
New patient visit (45+ min)153$22,401$146
Return visit (30+ min)183$18,713$93
Short return visit (20+ min)120$15,337$67
Nerve test59$10,746$176
Muscle electrical test63$10,412$83

Drugs they prescribed that Part D paid

$40,293

Pharmacies billed $40,293 in 2024.

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

699 generic and 21 brand-name prescriptions · $40,293 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
Carbidopa-Levodopa-Entacapone12$6,566$547
Memantine Hcl Er11$5,573$507
Carbidopa-Levodopa Er84$4,878$58
Memantine245$3,915$16
Selegiline22$1,970$90
See all 14 drugs
Every Part D drug this clinician prescribed
Carbidopa-Levodopa-Entacapone12$6,566$547
Memantine Hcl Er11$5,573$507
Carbidopa-Levodopa Er84$4,878$58
Memantine245$3,915$16
Selegiline22$1,970$90
Levetiracetam45$1,687$37
Quetiapine17$962$57
Gabapentin99$931$9
Carbidopa-Levodopa24$564$24
Pramipexole Dihydrochloride13$329$25
Propranolol19$313$16
Trazodone16$272$17
Donepezil20$116$6
Meclizine14$42$3

Year by year

Part D prescribing by year
2024720227None3%$40,293
2023898273None2%$79,653
20221,012282None3%$91,643
20211,123327None2%$88,000
20201,2622821% (15)2%$116,231
20191,432336None6%$149,921
20181,6343420% (0)6%$127,802
20171,5893290% (0)6%$111,719
20161,8913770% (0)None$136,514
20152,4004400% (0)None$192,403
20142,5614160% (0)None$226,274
20132,7024720% (0)21%$217,194

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

See the drugs prescribed each year

2023: 17 drugs

Part D drugs prescribed in 2023
Carbidopa-Levodopa Er97$10,980$113
Memantine240$10,878$45
Memantine Hcl Er14$9,509$679
Carbidopa-Levodopa-Entacapone14$8,425$602
Aspirin-Dipyridamole Er24$7,479$312
Levetiracetam60$4,299$72
Selegiline24$3,286$137
Gabapentin152$2,932$19
Pregabalin14$2,541$181
Carbidopa-Levodopa33$1,816$55
Quetiapine12$1,597$133
Propranolol31$1,062$34
Pramipexole Dihydrochloride18$463$26
Clopidogrel15$326$22
Trazodone19$273$14
Primidone14$145$10
Meclizine17$137$8

2022: 19 drugs

Part D drugs prescribed in 2022
Carbidopa-Levodopa Er108$16,954$157
Memantine252$11,706$46
Carbidopa-Levodopa-Entacapone21$10,718$510
Memantine Hcl Er17$8,575$504
Aspirin-Dipyridamole Er30$5,430$181
Carbidopa-Levodopa38$4,783$126
Selegiline29$4,327$149
Levetiracetam63$2,827$45
Quetiapine31$1,903$61
Gabapentin150$1,722$11
Pregabalin15$1,243$83
Enulose12$614$51
Lactulose13$588$45
Propranolol20$537$27
Pramipexole Dihydrochloride18$516$29
Clopidogrel19$319$17
Trazodone21$167$8
Meclizine20$155$8
Primidone21$112$5

2021: 18 drugs

Part D drugs prescribed in 2021
Carbidopa-Levodopa Er136$16,669$123
Aspirin-Dipyridamole Er31$11,029$356
Memantine208$9,005$43
Memantine Hcl Er21$8,949$426
Carbidopa-Levodopa-Entacapone12$6,958$580
Selegiline37$5,025$136
Levetiracetam69$3,316$48
Carbidopa-Levodopa36$2,432$68
Gabapentin247$2,018$8
Pregabalin19$1,558$82
Quetiapine44$1,315$30
Propranolol29$650$22
Pramipexole Dihydrochloride15$523$35
Clopidogrel19$225$12
Trazodone30$203$7
Meclizine18$150$8
Primidone17$110$6
Sertraline12$93$8

2020: 23 drugs

Part D drugs prescribed in 2020
Carbidopa-Levodopa Er176$20,689$118
Aspirin-Dipyridamole Er41$19,536$476
Memantine Hcl Er39$16,400$421
Rasagiline Mesylate16$12,045$753
Carbidopa-Levodopa-Entacapone12$9,158$763
Memantine189$7,939$42
Selegiline47$6,680$142
Pregabalin29$2,229$77
Levetiracetam63$2,228$35
Gabapentin239$1,901$8
Oxcarbazepine16$995$62
Carbidopa-Levodopa34$966$28
Quetiapine64$959$15
Pramipexole Dihydrochloride27$788$29
Propranolol33$545$17
Lactulose12$281$23
Clopidogrel29$259$9
Paroxetine18$191$11
Meclizine22$148$7
Trazodone20$121$6
Alprazolam12$95$8
Primidone17$74$4
Tramadol15$48$3

2019: 24 drugs

Part D drugs prescribed in 2019
Carbidopa-Levodopa Er197$21,346$108
Memantine216$20,726$96
Lyrica30$19,658$655
Neupro22$14,280$649
Memantine Hcl Er28$12,766$456
Aspirin-Dipyridamole Er25$11,528$461
Selegiline69$8,993$130
Carbidopa-Levodopa-Entacapone16$5,100$319
Gabapentin295$2,829$10
Quetiapine59$1,893$32
Levetiracetam59$1,686$29
Pramipexole Dihydrochloride33$1,535$47
Pregabalin15$1,407$94
Carbidopa-Levodopa31$1,352$44
Propranolol59$1,271$22
Clopidogrel19$400$21
Oxcarbazepine13$386$30
Meclizine49$332$7
Lactulose11$265$24
Primidone25$261$10
Paroxetine23$252$11
Trazodone24$156$6
Donepezil14$139$10
Alprazolam14$91$7

2018: 21 drugs

Part D drugs prescribed in 2018
Lyrica41$24,858$606
Carbidopa-Levodopa Er259$21,003$81
Memantine193$14,048$73
Selegiline108$11,764$109
Aggrenox14$11,647$832
Neupro16$10,046$628
Gabapentin377$2,492$7
Memantine Hcl Er13$2,337$180
Levetiracetam76$1,604$21
Quetiapine54$1,420$26
Propranolol67$1,213$18
Pramipexole Dihydrochloride43$1,118$26
Carbidopa-Levodopa31$917$30
Oxcarbazepine15$429$29
Cilostazol17$391$23
Trazodone36$354$10
Meclizine57$338$6
Donepezil37$294$8
Primidone24$267$11
Clopidogrel20$196$10
Alprazolam15$70$5

2017: 24 drugs

Part D drugs prescribed in 2017
Lyrica29$16,224$559
Carbidopa-Levodopa Er247$15,696$64
Selegiline132$12,563$95
Memantine175$9,724$56
Aggrenox15$9,542$636
Namenda Xr13$5,140$395
Lidocaine14$4,723$337
Gabapentin390$2,858$7
Levetiracetam71$1,205$17
Pramipexole Dihydrochloride48$1,134$24
Propranolol50$787$16
Carbidopa-Levodopa21$591$28
Quetiapine58$586$10
Primidone34$493$15
Oxcarbazepine16$482$30
Trazodone40$362$9
Lamotrigine11$332$30
Clopidogrel24$212$9
Donepezil35$205$6
Cilostazol16$194$12
Amitriptyline11$158$14
Lactulose11$146$13
Meclizine27$133$5
Alprazolam14$69$5

2016: 25 drugs

Part D drugs prescribed in 2016
Carbidopa-Levodopa Er335$22,232$66
Selegiline187$18,185$97
Aggrenox22$18,111$823
Lidocaine50$9,583$192
Memantine160$7,851$49
Lyrica14$7,358$526
Aspirin-Dipyridamole Er15$7,174$478
Gabapentin380$2,155$6
Levetiracetam96$1,942$20
Pramipexole Dihydrochloride53$1,811$34
Quetiapine96$1,565$16
Pyridostigmine11$865$79
Donepezil87$726$8
Propranolol Hcl Er12$572$48
Propranolol33$523$16
Carbidopa-Levodopa20$408$20
Trazodone45$382$8
Primidone34$371$11
Oxcarbazepine13$328$25
Cilostazol18$316$18
Lactulose17$192$11
Meclizine35$190$5
Clopidogrel20$178$9
Amitriptyline13$104$8
Alprazolam11$58$5

2015: 29 drugs

Part D drugs prescribed in 2015
Aggrenox52$35,942$691
Namenda107$34,863$326
Carbidopa-Levodopa Er472$29,634$63
Selegiline227$20,638$91
Lyrica21$9,931$473
Azilect16$8,592$537
Lidocaine20$5,151$258
Memantine67$4,307$64
Gabapentin494$3,052$6
Levetiracetam115$2,488$22
Quetiapine108$1,783$17
Donepezil136$1,604$12
Pramipexole Dihydrochloride40$1,455$36
Pyridostigmine23$1,274$55
Carbidopa-Levodopa29$659$23
Propranolol Hcl Er12$575$48
Propranolol53$523$10
Primidone37$445$12
Oxcarbazepine14$405$29
Cilostazol22$371$17
Clopidogrel35$350$10
Trazodone54$330$6
Meclizine45$321$7
Pentoxifylline14$252$18
Prednisone11$127$12
Amitriptyline11$88$8
Trihexyphenidyl15$72$5
Sertraline14$71$5
Alprazolam12$65$5

2014: 31 drugs

Part D drugs prescribed in 2014
Namenda244$71,353$292
Aggrenox65$30,756$473
Carbidopa-Levodopa Er466$26,528$57
Selegiline265$23,426$88
Keppra16$16,502$1,031
Azilect24$15,191$633
Lyrica23$9,122$397
Lamictal11$5,731$521
Gabapentin549$3,804$7
Quetiapine107$3,723$35
Levetiracetam105$2,737$26
Pramipexole Dihydrochloride43$2,034$47
Pyridostigmine30$1,463$49
Donepezil103$1,256$12
Propranolol Hcl Er17$749$44
Primidone44$680$15
Lidocaine11$611$56
Oxcarbazepine13$445$34
Clopidogrel27$433$16
Cilostazol31$424$14
Carbidopa-Levodopa14$377$27
Trazodone44$322$7
Meclizine33$290$9
Propranolol56$260$5
Generlac14$233$17
Lactulose12$224$19
Prednisone13$150$12
Alprazolam13$92$7
Trihexyphenidyl14$83$6
Clonazepam14$81$6
Sertraline13$74$6

2013: 32 drugs

Part D drugs prescribed in 2013
Namenda232$64,678$279
Selegiline273$25,665$94
Carbidopa-Levodopa Er438$25,387$58
Aggrenox62$20,937$338
Keppra16$15,048$940
Azilect31$13,983$451
Lyrica36$11,031$306
Quetiapine78$5,483$70
Gabapentin648$4,939$8
Levetiracetam139$3,944$28
Carbidopa-Levodopa-Entacapone12$3,228$269
Pramipexole Dihydrochloride54$2,700$50
Clopidogrel27$2,002$74
Donepezil75$1,483$20
Pyridostigmine27$1,125$42
Primidone56$925$17
Carbidopa-Levodopa30$918$31
Cilostazol39$647$17
Propranolol65$635$10
Pentoxifylline22$522$24
Dipyridamole11$403$37
Fluvoxamine Maleate12$282$23
Lactulose13$258$20
Trazodone36$246$7
Meclizine27$240$9
Trihexyphenidyl31$222$7
Lamotrigine11$210$19
Sertraline17$141$8
Alprazolam18$116$6
Clonazepam17$112$7
Prednisone13$67$5
Amitriptyline11$30$3

Money from drug and device companies

$72 in 2019

A payment is not proof that care is biased.

Payments by company
Janssen PharmaceuticalsXarelto$72
1 payment
  • Meals for Xarelto · 2019-10-02 · $72
See the published payment
Every published payment
Janssen PharmaceuticalsMeals · 2019-10-02Xarelto$72

Professional record

NPI
1578503462
Licence
CA A45801California A45801: Current · expires 2028-12-31
Gender
Male
More record details
Sole proprietor
No
Taxonomy
Neurology (2084N0400X)
Mailing address
3115 Geary Blvd, San Francisco, CA, 94118
NPI first listed
2006-06-07
NPI last updated
2017-10-11

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