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Karen Adams, MD

Obstetrics/Gynecology · Stanford

NPI 1922016484

Medicare standing
Clear
Enrolled, allowed to bill and order, not excluded
Plans that list them
5
2 carriers
Office
1

Offices

1 location · Stanford Health Care · 3,152 clinicians in this group

Looking this up.

Hospitals listed: Stanford Health Care. That is not proof they admit you there this week.

Plans that list them

5 plans · 2 carriers

A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Adams’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.

5 of 5 plans

Plans whose provider directory lists this clinician
SCAN Balance (HMO C-SNP)SCAN Health PlanListedOct 3, 2026
SCAN Classic (HMO)SCAN Health PlanListedOct 3, 2026
SCAN MyChoice (HMO)SCAN Health PlanListedOct 3, 2026
SCAN Strive (HMO C-SNP)SCAN Health PlanListedOct 3, 2026
DualConnect (HMO D-SNP)Santa Clara Family Health PlanListedSep 1, 2026

California Medical Board record

Licence G186905 · Current

Licensed to practise in California · since 2023 · expires 2027-06-30 · University of Texas Medical School at Houston.

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

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.

  • Stanford Health CareStanford, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Stanford Health Care, which runs 3 hospitalsHome of Stanford Cancer Institute, a National Cancer Institute designated comprehensive cancer centrePatients rate it 4 of 5 · 83% would definitely recommend it
    Overall rating: 5 of 5 starsWorse than the national rate — Perioperative pulmonary embolism or deep vein thrombosis rate: 5.31 (4.24 to 6.37) · 8,661 cases, Jul 2022 – Jun 2024Worse than the national rate — Rate of inpatient admissions for patients receiving outpatient chemotherapy: 14.1 (12.7 to 15.7) · 2,191 cases, Jan 2024 – Dec 2024Better than the national rate — Postoperative respiratory failure rate: 4.08 (1.95 to 6.21) · 5,296 cases, Jul 2022 – Jun 2024Better than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.317, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.446, Oct 2024 – Sep 2025Better than the national rate — SSI - Colon Surgery: 0.241, Oct 2024 – Sep 2025Better than the national rate — Ratio of unplanned hospital visits after hospital outpatient surgery: 0.7 (0.6 to 0.9) · 3,348 cases, Jan 2024 – Dec 2024
See every measure and the patient survey for Stanford Health Care

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: 2 better, 5 the same, 4 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 Stanford Health Care
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths5.31 (4.24 to 6.37) · 8,661 casesWorseJul 2022 – Jun 2024
Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits14.1 (12.7 to 15.7) · 2,191 casesWorseJan 2024 – Dec 2024
Postoperative respiratory failure rateComplications and deaths4.08 (1.95 to 6.21) · 5,296 casesBetterJul 2022 – Jun 2024
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.317BetterOct 2024 – Sep 2025
Clostridium Difficile (C.Diff)Infections0.446BetterOct 2024 – Sep 2025
SSI - Colon SurgeryInfections0.241BetterOct 2024 – Sep 2025
Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits0.7 (0.6 to 0.9) · 3,348 casesBetterJan 2024 – Dec 2024
Abdominopelvic accidental puncture or laceration rateComplications and deaths1.06 (0.45 to 1.67) · 5,374 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths0.86 (0.72 to 1)No differentJul 2022 – Jun 2024
Death rate among surgical inpatients with serious treatable complicationsComplications and deaths166.09 (137.88 to 194.3) · 470 casesNo differentJul 2022 – Jun 2024
Death rate for CABG surgery patientsComplications and deaths1.1 · 192 casesNoneJul 2022 – Jun 2025
Death rate for COPD patientsComplications and deaths6.4 · 146 casesNoneJul 2022 – Jun 2025
Death rate for heart attack patientsComplications and deaths9.7 · 253 casesNoneJul 2022 – Jun 2025
Death rate for heart failure patientsComplications and deaths6.3 · 880 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths10.3 · 935 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths8.7 · 501 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths2.1 · 7,730 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.13 (0 to 0.27) · 20,799 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.28 (0.14 to 0.43) · 23,182 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths0.94 (0.2 to 1.68) · 5,694 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2.36 (1.54 to 3.19) · 7,846 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths5.2 (3.76 to 6.64) · 5,603 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.38 (0.23 to 2.53) · 2,211 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.52 (0.21 to 0.83) · 19,915 casesNo differentJul 2022 – Jun 2024
Rate of complications for hip/knee replacement patientsComplications and deaths3.6 · 416 casesNoneApr 2023 – Mar 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.869No differentOct 2024 – Sep 2025
MRSA BacteremiaInfections0.857No differentOct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections0.368No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits16.2 · 247 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits20.5 · 1,021 casesNoneJul 2023 – Jun 2025
Hospital return days for heart attack patientsUnplanned return visits47.8 · 258 casesNoneJul 2022 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits-1.6 · 990 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits20.8 · 976 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits16.5 · 959 casesNoneJul 2023 – Jun 2025
Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits5.2 (4.4 to 6.2) · 2,191 casesNo differentJan 2024 – Dec 2024
Rate of readmission after hip/knee replacementUnplanned return visits5.1 · 425 casesNoneJul 2023 – Jun 2025
Rate of readmission for CABGUnplanned return visits9.6 · 158 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits19.6 · 183 casesNoneJul 2023 – Jun 2025
Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits12.7 (10.4 to 15.4) · 4,578 casesNo differentJan 2022 – Dec 2024

What patients said (6,810 patients answered, 25% of those asked)

Patient survey stars by topic at Stanford Health Care
Cleanliness4
Nurse communication4
Doctor communication4
Communication about medicines3
Discharge information4
Overall hospital rating4
Quietness2
Recommend hospital5
Share of patients giving the best answer at Stanford Health Care
Room was "always" clean75%
Nurses "always" communicated well82%
Doctors "always" communicated well81%
Staff "always" explained63%
Yes, staff "did" give patients this information89%
Yes, staff "did" give patients information about help after discharge89%
Doctors "always" explained things so they could understand76%
Doctors "always" listened carefully80%
Doctors "always" treated them with courtesy and respect87%
Patients who gave a rating of "9" or "10" (high)79%
Staff "always" explained new medications76%
Nurses "always" explained things so they could understand77%
Nurses "always" listened carefully79%
Nurses "always" treated them with courtesy and respect88%
"Always" quiet at night53%
"YES", patients would definitely recommend the hospital83%
Staff "always" explained possible side effects50%
Yes, staff "did" give patients information about possible symptoms90%

Original Medicare doctor bills

$13,466

Medicare paid this office $13,466 for 90 people.

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

Largest Original Medicare bills
New patient visit (45+ min)20$3,049$152
Long return visit (40+ min)19$2,947$155
Short return visit (20+ min)20$2,138$93
Return visit (30+ min)12$1,466$122

Who their Medicare patients are

90 Original Medicare patients in 2024. Average age 68 · Under 65 21% · Women 100% · Also on Medicaid 24% · Health risk score 1.13. Above the middle of the specialty; the typical obstetrics & gynecology clinician is at 0.88.

Conditions among them: High blood pressure 36% · Depression 27% · Cancer 20% · Coronary heart disease 13%.

The office billed $67,502, Medicare allowed $18,087 and paid $13,466; for 113 services of 9 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
202490113681.13$67,502$13,466
20233436670.85$22,740$3,695
20225363680.99$15,361$3,766
202185102690.99$25,234$7,573
20207183690.83$20,310$5,582
201980115661.09$22,284$6,272
20186886690.85$10,472$4,965
20174757651.09$5,088$3,000
20163540680.67$3,116$1,820
20154259651.01$4,888$2,474
20143241680.85$3,608$1,753
20133244611.04$4,117$1,963

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: 1 service

Original Medicare services billed in 2023
Long return visit (40+ min)12$1,596$133

2022: 1 service

Original Medicare services billed in 2022
Short return visit (20+ min)16$905$50

2021: 4 services

Original Medicare services billed in 2021
Return visit (30+ min)20$1,489$71
New patient visit (45+ min)14$1,454$104
New patient visit (30+ min)19$1,120$59
Short return visit (20+ min)12$571$48

2020: 3 services

Original Medicare services billed in 2020
Long return visit (40+ min)13$1,227$82
Return visit (30+ min)16$1,022$57
New patient visit (30+ min)11$574$52

2019: 3 services

Original Medicare services billed in 2019
Return visit (30+ min)26$1,677$51
Short return visit (20+ min)21$837$36
New patient visit (30+ min)15$734$49

2018: 3 services

Original Medicare services billed in 2018
Return visit (30+ min)26$1,280$49
New patient visit (30+ min)21$1,113$53
Short return visit (20+ min)18$665$37

2017: 3 services

Original Medicare services billed in 2017
New patient visit (30+ min)14$857$61
Return visit (30+ min)13$756$58
Short return visit (20+ min)15$572$36

2016: 2 services

Original Medicare services billed in 2016
Return visit (30+ min)11$560$51
New patient visit (30+ min)11$546$50

2015: 1 service

Original Medicare services billed in 2015
Short return visit (20+ min)22$691$30

Medicaid work

$26,143 in 2020

Medicaid paid $26,143 for 274 billed services this clinician did in 2020, up to 39 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 2020
Hospital outpatient clinic visit for assessment and management of a patient274$26,143
Medicaid work by year
2020274139$26,143
2019338142$26,780
2018443553$34,266
See the largest Medicaid services in earlier years

2019

Largest Medicaid services in 2019
Hospital outpatient clinic visit for assessment and management of a patient338$26,780

2018

Largest Medicaid services in 2018
Hospital outpatient clinic visit for assessment and management of a patient394$34,262
COLLECTION VENOUS BLOOD VENIPUNCTURE13$4
Infectious agent detection by nucleic acid (DNA or RNA); Candida species, direct probe technique12$0
Infectious agent detection by nucleic acid (DNA or RNA); Gardnerella vaginalis, direct probe technique12$0
Infectious agent detection by nucleic acid (DNA or RNA); Trichomonas vaginalis, direct probe technique12$0

Drugs they prescribed that Part D paid

$32,880

Pharmacies billed $32,880 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 246) in 2024. At or below the middle of the specialty; the typical obstetrics & gynecology clinician is at 0%.

189 generic and 57 brand-name prescriptions · $32,880 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
Estradiol (Twice Weekly)59$6,889$117
Estradiol54$2,646$49
Progesterone50$2,001$40
Gabapentin16$111$7

Year by year

Part D prescribing by year
2024246700% (0)23%$32,880
202375460% (0)24%$10,728
2022256810% (0)17%$33,054
2021296960% (0)20%$33,372
2020295770% (0)19%$34,472
2019271800% (0)23%$28,752
2018200520% (0)26%$21,351
2017170410% (0)None$25,339
2016186430% (0)37%$22,917
201516342None42%$20,174
2014148320% (0)61%$16,833
2013116300% (0)69%$12,144

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

See the drugs prescribed each year

2023: 3 drugs

Part D drugs prescribed in 2023
Estradiol16$2,758$172
Estradiol (Twice Weekly)12$2,336$195
Progesterone13$956$74

2022: 3 drugs

Part D drugs prescribed in 2022
Estradiol77$12,555$163
Estradiol (Twice Weekly)33$5,033$153
Progesterone50$2,535$51

2021: 5 drugs

Part D drugs prescribed in 2021
Estradiol66$8,277$125
Estradiol (Twice Weekly)26$4,326$166
Progesterone52$3,039$58
Gabapentin31$506$16
Clobetasol Propionate11$231$21

2020: 7 drugs

Part D drugs prescribed in 2020
Estradiol67$10,396$155
Progesterone54$3,672$68
Estradiol (Twice Weekly)12$2,195$183
Estradiol (Once Weekly)24$1,917$80
Gabapentin28$600$21
Clobetasol Propionate15$457$30
Sertraline12$109$9

2019: 3 drugs

Part D drugs prescribed in 2019
Estradiol76$9,518$125
Progesterone51$4,109$81
Gabapentin49$862$18

2018: 5 drugs

Part D drugs prescribed in 2018
Estradiol48$4,295$89
Metronidazole20$1,336$67
Progesterone15$797$53
Medroxyprogesterone Acetate11$135$12
Gabapentin15$130$9

2017: 4 drugs

Part D drugs prescribed in 2017
Prempro12$4,842$403
Progesterone18$1,132$63
Estradiol35$1,014$29
Medroxyprogesterone Acetate14$172$12

2016: 5 drugs

Part D drugs prescribed in 2016
Vagifem14$4,879$348
Combipatch15$2,524$168
Progesterone21$1,505$72
Estradiol35$580$17
Medroxyprogesterone Acetate11$65$6

2015: 3 drugs

Part D drugs prescribed in 2015
Vagifem35$9,068$259
Estrace11$2,239$204
Estradiol24$598$25

2014: 3 drugs

Part D drugs prescribed in 2014
Vagifem44$7,060$160
Estradiol12$200$17
Acyclovir11$183$17

2013: 2 drugs

Part D drugs prescribed in 2013
Vagifem42$5,547$132
Premarin15$1,661$111

Money from drug and device companies

$66 in 2023

A payment is not proof that care is biased.

Payments by company
Astellas Pharma USNone$66
1 payment
  • Meals · 2023-09-26 · $66
See the published payment
Every published payment
Astellas Pharma USMeals · 2023-09-26None$66

Checkups this office reported

Medicare did not publish checkup rates for this clinician.

Medicare’s overall office score
76.5 / 100
Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.

Professional record

NPI
1922016484
Licence
CA G186905, OR MD16031California G186905: Current · expires 2027-06-30
Trained
University of Texas Medical School at Houston, 1988
Video visits
Lists video visits
Gender
Female
More record details
Sole proprietor
No
Medicaid ID
OR 017652
Taxonomy
Federal specialty code 207VG0400X (207VG0400X); Federal specialty code 207V00000X (207V00000X)
Mailing address
300 Pasteur Dr, Stanford, CA, 94305
NPI first listed
2006-08-03
NPI last updated
2024-04-19
NPI record certified
2024-04-19

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

Extra NPI addresses: 3181 Sw Sam Jackson Park Rd, Portland, OR, 97239