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John R Chamberlain, MD

Psychiatry · San Francisco

NPI 1114036480

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
12
2 carriers
Office
1
Since medical school
31 years
University of California, San Diego School of Medicine, 1995

Offices

1 location · University of California San Francisco · 1,780 clinicians in this group

Looking this up.

Hospitals listed: UCSF Medical Center. That is not proof they admit you there this week.

Plans that list them

12 plans · 2 carriers

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Chamberlain’s office at (415) 476-1000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

12 of 12 plans

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
Imperial Courage Plan (HMO)Imperial Health Plan of California, Inc.ListedSep 1, 2026
Imperial Dynamic Plan (HMO)Imperial Health Plan of California, Inc.ListedSep 1, 2026
Imperial Senior Value (HMO C-SNP)Imperial Health Plan of California, Inc.ListedSep 1, 2026

Hospitals they work in

1 hospital

These rate the hospital, not this clinician. Most measures at most hospitals are no different from the national rate.

  • UCSF Medical CenterSan Francisco, CAAcute Care Hospital · Voluntary non-profit - Other · Has an emergency department · Birthing-friendlyPart of University of California Health, which runs 12 hospitalsHome of UCSF Helen Diller Family Comprehensive Cancer Center, a National Cancer Institute designated comprehensive cancer centrePatients rate it 4 of 5 · 81% would definitely recommend it
    Overall rating: 4 of 5 starsWorse than the national rate — Perioperative pulmonary embolism or deep vein thrombosis rate: 4.9 (3.79 to 6.02) · 7,590 cases, Jul 2022 – Jun 2024Worse than the national rate — Rate of inpatient admissions for patients receiving outpatient chemotherapy: 12.8 (11.3 to 14.4) · 2,019 cases, Jan 2024 – Dec 2024Better than the national rate — Death rate among surgical inpatients with serious treatable complications: 139.4 (110.22 to 168.58) · 452 cases, Jul 2022 – Jun 2024Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.622, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.626, Oct 2024 – Sep 2025Better than the national rate — MRSA Bacteremia: 0.491, Oct 2024 – Sep 2025Better than the national rate — Ratio of unplanned hospital visits after hospital outpatient surgery: 0.8 (0.7 to 1) · 2,336 cases, Jan 2024 – Dec 2024
See every measure and the patient survey for UCSF Medical Center

Behind the star rating — Deaths: 5 better, 3 the same, 0 worse of 8 measures. Safety: 3 better, 5 the same, 0 worse of 8 measures. Readmissions: 3 better, 5 the same, 3 worse of 11 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.

Every scored measure at UCSF Medical Center
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths4.9 (3.79 to 6.02) · 7,590 casesWorseJul 2022 – Jun 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits12.8 (11.3 to 14.4) · 2,019 casesWorseJan 2024 – Dec 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths139.4 (110.22 to 168.58) · 452 casesBetterJul 2022 – Jun 2024
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.622BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.626BetterOct 2024 – Sep 2025
MRSA BacteremiaInfections0.491BetterOct 2024 – Sep 2025
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits0.8 (0.7 to 1) · 2,336 casesBetterJan 2024 – Dec 2024
Abdominopelvic accidental puncture or laceration rateComplications and deaths1.24 (0.58 to 1.9) · 4,689 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths1.05 (0.89 to 1.2)No differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths1.9 · 89 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths7.5 · 85 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths10.1 · 132 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths6.6 · 454 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths10.3 · 618 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths9.6 · 380 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths2.7 · 5,000 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.22 (0.06 to 0.38) · 15,965 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.2 (0.05 to 0.35) · 17,859 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths0.85 (0 to 1.83) · 4,184 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2 (1.1 to 2.9) · 6,516 casesNo differentJul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths7.35 (4.49 to 10.21) · 3,989 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths5 (3.22 to 6.77) · 4,087 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.95 (0.74 to 3.15) · 2,034 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.95 (0.63 to 1.28) · 15,431 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths4 · 399 casesNoneApr 2023 – Mar 2025
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.899No differentOct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections0.689No differentOct 2024 – Sep 2025
SSI - Colon SurgeryInfections1.224No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits16 · 156 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits20 · 564 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits60.3 · 160 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits-9.7 · 550 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits44.1 · 660 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits16.8 · 667 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits5.7 (4.8 to 6.7) · 2,019 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits6 · 421 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits10.5 · 53 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits20 · 107 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits13.9 (11.3 to 17.1) · 3,247 casesNo differentJan 2022 – Dec 2024

What patients said (3,181 patients answered, 25% of those asked)

Patient survey stars by topic at UCSF Medical Center
Cleanliness4
Nurse communication4
Doctor communication4
Communication about medicines3
Discharge information4
Overall hospital rating4
Quietness2
Recommend hospital5
Share of patients giving the best answer at UCSF Medical Center
Room was "always" clean71%
Nurses "always" communicated well80%
Doctors "always" communicated well80%
Staff "always" explained61%
Yes, staff "did" give patients this information88%
Yes, staff "did" give patients information about help after discharge87%
Doctors "always" explained things so they could understand74%
Doctors "always" listened carefully78%
Doctors "always" treated them with courtesy and respect86%
Patients who gave a rating of "9" or "10" (high)76%
Staff "always" explained new medications75%
Nurses "always" explained things so they could understand77%
Nurses "always" listened carefully78%
Nurses "always" treated them with courtesy and respect86%
"Always" quiet at night50%
"YES", patients would definitely recommend the hospital81%
Staff "always" explained possible side effects46%
Yes, staff "did" give patients information about possible symptoms90%

Original Medicare doctor bills

$56,349

Medicare paid this office $56,349 for 165 people.

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

Largest Original Medicare bills
Return visit (30+ min)159$41,268$81
Psychotherapy with evaluation and management visit, 30 minutes18$5,723$53

Who their Medicare patients are

165 Original Medicare patients in 2024. Average age 67 · Under 65 35% · Women 62% · Also on Medicaid 44% · Health risk score 1.88. Above the middle of the specialty; the typical psychiatry clinician is at 1.35.

Conditions among them: Depression 75% · High blood pressure 63% · Chronic kidney disease 30% · Diabetes 21% · Coronary heart disease 16% · Cancer 13% · COPD 13% · Heart failure 10% · Dementia 9% · Atrial fibrillation 8% · Stroke 8%.

The office billed $394,505, Medicare allowed $74,916 and paid $56,349; for 746 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
2024165746671.88$394,505$56,349
2023300935661.57$509,351$72,907
20222811,156661.51$589,161$85,881
2021203889671.47$428,335$67,001
2020229828631.45$430,166$56,631
2019160459621.43$248,658$32,486
2018179487601.37$259,706$33,438
2017124322591.46$167,487$23,525
2016126442581.42$196,574$29,440
201585264591.47$98,811$16,135
20142782541.81$28,102$5,426
201321101561.29$31,486$4,411

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: 4 services

Original Medicare services billed in 2023
Return visit (30+ min)275$58,745$83
Psychotherapy with evaluation and management visit, 30 minutes25$6,335$53
Psychiatric diagnostic evaluation with medical services17$2,231$131
Short return visit (20+ min)18$1,408$44

2022: 5 services

Original Medicare services billed in 2022
Return visit (30+ min)238$60,614$83
Psychotherapy with evaluation and management visit, 30 minutes37$9,696$54
Short return visit (20+ min)47$6,989$57
Psychiatric diagnostic evaluation with medical services15$2,278$152
Telephone medical discussion with physician, 5-10 minutes32$1,279$26

2021: 5 services

Original Medicare services billed in 2021
Return visit (30+ min)166$41,216$87
Psychotherapy with evaluation and management visit, 30 minutes32$7,471$55
Short return visit (20+ min)36$6,928$58
Telephone medical discussion with physician, 21-30 minutes17$1,636$68
Telephone medical discussion with physician, 5-10 minutes33$1,298$29

2020: 6 services

Original Medicare services billed in 2020
Return visit (30+ min)191$35,042$68
Psychotherapy with evaluation and management visit, 30 minutes25$5,818$55
Psychiatric diagnostic evaluation with medical services26$3,191$123
Telephone medical discussion with physician, 21-30 minutes19$1,429$71
Telephone medical discussion with physician, 5-10 minutes28$859$23
Short return visit (20+ min)13$743$46

2019: 3 services

Original Medicare services billed in 2019
Return visit (30+ min)143$21,782$69
Psychotherapy with evaluation and management visit, 30 minutes19$3,993$56
Psychiatric diagnostic evaluation with medical services11$1,373$125

2018: 2 services

Original Medicare services billed in 2018
Return visit (30+ min)158$23,066$66
Short return visit (20+ min)15$730$38

2017: 1 service

Original Medicare services billed in 2017
Return visit (30+ min)95$12,316$66

2016: 2 services

Original Medicare services billed in 2016
Return visit (30+ min)67$8,015$65
Short return visit (20+ min)39$2,569$37

2015: 2 services

Original Medicare services billed in 2015
Short return visit (20+ min)54$4,995$45
Short return visit (20+ min)14$4,209$69

2014: 2 services

Original Medicare services billed in 2014
Psychiatric diagnostic evaluation with medical services12$1,451$121
Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes12$1,185$35

Medicaid work

$2,114 in 2024

Medicaid paid $2,114 for 70 billed services this clinician did in 2024, up to 13 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 2024
Return visit (30+ min)70$2,114
Medicaid work by year
202470113$2,114
202368117$3,043
202243218$106
202015113$321
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
Return visit (30+ min)68$3,043

2022

Largest Medicaid services in 2022
Return visit (30+ min)13$106
Hospital outpatient clinic visit for assessment and management of a patient30$0

2020

Largest Medicaid services in 2020
Return visit (30+ min)15$321

Drugs they prescribed that Part D paid

$3,538

Pharmacies billed $3,538 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 98) in 2024. At or below the middle of the specialty; the typical psychiatry clinician is at 0%.

96 generic and fewer than 11 brand-name prescriptions · $3,538 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
Mirtazapine14$139$10
Diazepam13$35$3

Year by year

Part D prescribing by year
202498310% (0)None$3,538
202394240% (0)14%$6,370
202258260% (0)None$7,830
20216821220% (0)3%$34,629
20201,1381850% (0)None$103,707
20198061670% (0)7%$69,034
20189411630% (0)7%$74,122
2017494910% (0)4%$32,309
2016479690% (0)6%$22,390
2015241340% (0)7%$12,742
201414315None8%$11,053
2013177170% (0)14%$11,301

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

See the drugs prescribed each year

2023: 2 drugs

Part D drugs prescribed in 2023
Duloxetine16$448$28
Mirtazapine14$188$13

2021: 19 drugs

Part D drugs prescribed in 2021
Bupropion Xl58$2,635$45
Mirtazapine78$2,593$33
Duloxetine62$2,030$33
Quetiapine28$1,646$59
Naltrexone16$1,328$83
Doxepin15$1,289$86
Dextroamphetamine-Amphet Er11$1,096$100
Venlafaxine Hcl Er16$782$49
Dextroamphetamine-Amphetamine12$682$57
Gabapentin48$502$10
Sertraline39$407$10
Hydroxyzine15$380$25
Trazodone23$361$16
Propranolol14$287$21
Risperidone27$268$10
Lamotrigine38$260$7
Lithium Carbonate20$251$13
Buspirone17$197$12
Escitalopram23$179$8

2020: 30 drugs

Part D drugs prescribed in 2020
Bupropion Xl102$5,785$57
Trintellix14$5,601$400
Duloxetine84$5,580$66
Venlafaxine Hcl Er41$4,139$101
Ziprasidone16$1,932$121
Mirtazapine57$1,836$32
Aripiprazole33$1,593$48
Quetiapine40$1,549$39
Trazodone70$1,511$22
Hydroxyzine25$1,121$45
Gabapentin65$937$14
Dextroamphetamine-Amphetamine22$935$42
Sertraline75$857$11
Modafinil11$780$71
Naltrexone16$736$46
Oxcarbazepine11$668$61
Liothyronine18$659$37
Dextroamphetamine-Amphet Er15$642$43
Escitalopram54$522$10
Lamotrigine29$471$16
Prazosin12$452$38
Buspirone24$419$17
Risperidone22$406$18
Lithium Carbonate27$344$13
Fluoxetine16$285$18
Paroxetine11$284$26
Olanzapine14$153$11
Hydroxyzine Pamoate11$125$11
Diazepam11$64$6
Clonazepam13$48$4

2019: 21 drugs

Part D drugs prescribed in 2019
Aripiprazole38$4,971$131
Bupropion Xl84$4,318$51
Venlafaxine Hcl Er35$3,566$102
Viibryd11$3,458$314
Duloxetine63$3,436$55
Quetiapine30$813$27
Trazodone41$807$20
Escitalopram49$765$16
Divalproex Sodium Er11$761$69
Mirtazapine33$746$23
Gabapentin36$732$20
Lamotrigine43$645$15
Dextroamphetamine-Amphetamine12$563$47
Fluoxetine25$530$21
Buspirone12$525$44
Hydroxyzine18$502$28
Haloperidol Decanoate13$335$26
Sertraline31$301$10
Bupropion13$295$23
Lithium Carbonate16$218$14
Olanzapine21$180$9

2018: 22 drugs

Part D drugs prescribed in 2018
Aripiprazole40$4,782$120
Bupropion Xl82$4,622$56
Viibryd14$4,146$296
Duloxetine64$2,960$46
Divalproex Sodium Er16$2,723$170
Trazodone100$2,320$23
Venlafaxine Hcl Er25$1,026$41
Quetiapine45$1,001$22
Fluoxetine21$771$37
Mirtazapine44$703$16
Lithium Carbonate Er26$699$27
Buspirone15$673$45
Lamotrigine65$625$10
Gabapentin19$609$32
Bupropion23$463$20
Sertraline59$444$8
Haloperidol Decanoate11$410$37
Prazosin12$400$33
Escitalopram31$372$12
Hydroxyzine22$265$12
Lithium Carbonate14$127$9
Olanzapine13$105$8

2017: 12 drugs

Part D drugs prescribed in 2017
Duloxetine31$2,085$67
Bupropion Xl34$1,840$54
Trazodone49$1,746$36
Aripiprazole18$1,543$86
Fluoxetine27$790$29
Venlafaxine Hcl Er26$713$27
Quetiapine24$547$23
Mirtazapine44$505$11
Sertraline44$375$9
Lamotrigine19$185$10
Escitalopram20$182$9
Topiramate12$110$9

2016: 15 drugs

Part D drugs prescribed in 2016
Duloxetine20$3,423$171
Bupropion Xl18$956$53
Venlafaxine Hcl Er46$865$19
Mirtazapine55$817$15
Quetiapine23$565$25
Trazodone34$520$15
Lithium Carbonate Er24$490$20
Lamotrigine44$481$11
Gabapentin20$355$18
Sertraline20$249$12
Escitalopram26$233$9
Bupropion11$172$16
Bupropion Hcl Sr12$147$12
Topiramate12$119$10
Propranolol13$107$8

2015: 7 drugs

Part D drugs prescribed in 2015
Venlafaxine Hcl Er37$936$25
Lamotrigine24$302$13
Lithium Carbonate Er15$300$20
Trazodone25$224$9
Topiramate13$126$10
Sertraline11$118$11
Clonazepam12$62$5

2014: 5 drugs

Part D drugs prescribed in 2014
Venlafaxine Hcl Er16$496$31
Trazodone23$193$8
Lamotrigine11$114$10
Mirtazapine12$104$9
Citalopram Hbr15$98$7

2013: 7 drugs

Part D drugs prescribed in 2013
Venlafaxine Hcl Er18$576$32
Topiramate17$457$27
Trazodone18$167$9
Lamotrigine14$165$12
Mirtazapine13$126$10
Citalopram Hbr18$116$6
Buspirone12$45$4

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score
74.5 / 100
Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Professional record

NPI
1114036480
Licence
CA A065086
Trained
University of California, San Diego School of Medicine, 1995 · 31 years ago
Video visits
Lists video visits
Gender
Male
More record details
Sole proprietor
No
Taxonomy
Federal specialty code 2084F0202X (2084F0202X); Psychiatry (2084P0800X)
Mailing address
401 Parnassus Ave, Box Adm, San Francisco, CA, 94143
NPI first listed
2006-08-30
NPI last updated
2008-04-22

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