Keith A Posley, MD
Hospitalist · Mountain View
- Medicare standing
- 2 flags on the record
- Listed below.
- Plans that list them
- 1
- 1 carrier
- Office
- 1
On the public record
- California licence: Current
- 1 Medical Board action on record
Offices
1 location · Sutter Bay Medical Foundation · 3,783 clinicians in this group
Looking this up.
Hospitals listed: El Camino Health. That is not proof they admit you there this week.
Plans that list them
1 plan · 1 carrier
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Posley’s office at (650) 691-6174 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
| DualConnect (HMO D-SNP) | Santa Clara Family Health Plan | Listed | Sep 1, 2026 |
California Medical Board record
Licence G80235 · Current
Licensed to practise in California · since 1994 · expires 2028-08-31 · University of Southern California Keck School of Medicine. Board flags: Admin Action By Other State/Fed Gov'T.
Public record actions
| 2005-09-22 | Action in another state or by a federal agencyDiscipline | Dr. posley was assessed a $500 fine by the virginia board. · Virginia board of medicine |
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.
- El Camino HealthMountain View, CAAcute Care Hospital · Government - Hospital District or Authority · Has an emergency department · Birthing-friendlyPart of El Camino Health, which runs 2 hospitalsPatients rate it 4 of 5 · 80% would definitely recommend itOverall rating: 4 of 5 starsBetter than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.291, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.393, Oct 2024 – Sep 2025Better than the national rate — MRSA Bacteremia: 0, Oct 2024 – Sep 2025
See every measure and the patient survey for El Camino Health
Behind the star rating — Deaths: 3 better, 5 the same, 0 worse of 8 measures. Safety: 3 better, 5 the same, 0 worse of 8 measures. Readmissions: 1 better, 9 the same, 1 worse of 11 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.291 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.393 | Better | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 0.96 (0.12 to 1.79) · 2,340 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 1.02 (0.76 to 1.28) | No different | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 167.38 (125.03 to 209.73) · 96 cases | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 2.6 · 68 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 7.1 · 185 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 11.8 · 200 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 8.9 · 814 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 13 · 842 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 9.6 · 361 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 2.6 · 4,633 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.16 (0 to 0.34) · 11,474 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.27 (0.1 to 0.45) · 11,626 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 3.14 (1.39 to 4.9) · 2,814 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 2 (0.61 to 3.39) · 1,327 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.11 (0.8 to 3.43) · 2,641 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 9.39 (4.18 to 14.6) · 1,287 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 6.57 (3.47 to 9.68) · 1,308 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 2.14 (0.71 to 3.57) · 827 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.6 (0.05 to 1.15) · 9,460 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 4.5 · 122 cases | None | Apr 2023 – Mar 2025 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.993 | No different | Oct 2024 – Sep 2025 |
| SSI - Abdominal HysterectomyInfections | 0.706 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 1.376 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 15.5 · 218 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 19.5 · 962 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | 3.8 · 200 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -17 · 922 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 18.6 · 860 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 18.7 · 827 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 6.1 (4.5 to 8.2) · 313 cases | No different | Jan 2024 – Dec 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 13.4 (10.6 to 16.5) · 313 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 6.1 · 144 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 10.3 · 80 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 20.7 · 237 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 12.8 (10 to 16.1) · 1,639 cases | No different | Jan 2022 – Dec 2024 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 0.9 (0.8 to 1.1) · 1,619 cases | No different | Jan 2024 – Dec 2024 |
What patients said (1,535 patients answered, 22% of those asked)
| Cleanliness | 4 |
| Nurse communication | 4 |
| Doctor communication | 4 |
| Communication about medicines | 3 |
| Discharge information | 3 |
| Overall hospital rating | 4 |
| Quietness | 2 |
| Recommend hospital | 5 |
| Room was "always" clean | 75% |
| Nurses "always" communicated well | 79% |
| Doctors "always" communicated well | 81% |
| Staff "always" explained | 61% |
| Yes, staff "did" give patients this information | 86% |
| Yes, staff "did" give patients information about help after discharge | 86% |
| Doctors "always" explained things so they could understand | 76% |
| Doctors "always" listened carefully | 80% |
| Doctors "always" treated them with courtesy and respect | 87% |
| Patients who gave a rating of "9" or "10" (high) | 76% |
| Staff "always" explained new medications | 76% |
| Nurses "always" explained things so they could understand | 75% |
| Nurses "always" listened carefully | 76% |
| Nurses "always" treated them with courtesy and respect | 87% |
| "Always" quiet at night | 47% |
| "YES", patients would definitely recommend the hospital | 80% |
| Staff "always" explained possible side effects | 46% |
| Yes, staff "did" give patients information about possible symptoms | 86% |
Original Medicare doctor bills
$58,872
Medicare paid this office $58,872 for 221 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 73 | $21,105 | $107 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 92 | $15,595 | $71 |
| Hospital discharge day management, more than 30 minutes | 91 | $10,190 | $105 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 53 | $8,238 | $155 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 16 | $1,867 | $117 |
See all 6 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 73 | $21,105 | $107 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 92 | $15,595 | $71 |
| Hospital discharge day management, more than 30 minutes | 91 | $10,190 | $105 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 53 | $8,238 | $155 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 16 | $1,867 | $117 |
| Hospital discharge day management, 30 minutes or less | 23 | $1,641 | $71 |
Who their Medicare patients are
221 Original Medicare patients in 2024. Average age 81 · 85 and older 39% · Women 52% · Also on Medicaid 15% · Health risk score 2.14. At or below the middle of the specialty; the typical hospitalist clinician is at 2.49.
Conditions among them: High blood pressure 75% · Chronic kidney disease 50% · Atrial fibrillation 47% · Diabetes 45% · Coronary heart disease 45% · Heart failure 42% · Depression 33% · Dementia 33% · Cancer 29% · Stroke 25% · COPD 21%.
The office billed $215,898, Medicare allowed $73,911 and paid $58,872; for 612 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
| 2024 | 221 | 612 | 81 | 2.14 | $215,898 | $58,872 |
| 2023 | 296 | 840 | 82 | 2.17 | $310,866 | $86,848 |
| 2022 | 284 | 724 | 82 | 2.15 | $266,809 | $70,752 |
| 2021 | 294 | 831 | 80 | 2.13 | $294,395 | $81,164 |
| 2020 | 297 | 761 | 80 | 2.51 | $247,990 | $77,178 |
| 2019 | 398 | 984 | 80 | 2.15 | $292,200 | $87,115 |
| 2018 | 196 | 485 | 80 | 1.69 | $115,584 | $35,683 |
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: 6 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 122 | $40,012 | $110 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 94 | $14,127 | $72 |
| Hospital discharge day management, more than 30 minutes | 116 | $13,441 | $108 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 81 | $12,803 | $158 |
| Hospital discharge day management, 30 minutes or less | 42 | $3,164 | $75 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 24 | $2,902 | $116 |
2022: 8 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 107 | $29,298 | $95 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 67 | $12,293 | $183 |
| Hospital discharge day management, more than 30 minutes | 107 | $10,824 | $99 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 69 | $9,033 | $66 |
| Initial hospital observation care per day, typically 70 minutes | 14 | $2,172 | $155 |
| Hospital discharge day management, 30 minutes or less | 31 | $2,102 | $68 |
| Hospital observation care on day of discharge | 17 | $1,139 | $67 |
| Follow-up observation care per day, typically 25 minutes | 12 | $852 | $61 |
2021: 8 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 125 | $38,541 | $96 |
| Hospital discharge day management, more than 30 minutes | 112 | $12,251 | $100 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 71 | $10,268 | $65 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 55 | $9,994 | $178 |
| Initial hospital observation care per day, typically 70 minutes | 13 | $2,058 | $158 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 14 | $1,755 | $125 |
| Hospital discharge day management, 30 minutes or less | 19 | $1,248 | $66 |
| Hospital observation care on day of discharge | 16 | $1,088 | $68 |
2020: 7 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 114 | $33,027 | $98 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 69 | $13,306 | $187 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 77 | $10,757 | $68 |
| Hospital discharge day management, more than 30 minutes | 97 | $10,216 | $102 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 27 | $2,925 | $108 |
| Initial hospital observation care per day, typically 50 minutes | 18 | $2,245 | $125 |
| Hospital discharge day management, 30 minutes or less | 17 | $1,158 | $68 |
2019: 7 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 204 | $29,012 | $65 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 90 | $15,337 | $92 |
| Hospital discharge day management, more than 30 minutes | 142 | $14,395 | $97 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 74 | $13,263 | $179 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 53 | $6,463 | $122 |
| Initial hospital observation care per day, typically 50 minutes | 25 | $2,957 | $118 |
| Hospital discharge day management, 30 minutes or less | 34 | $2,263 | $67 |
2018: 9 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 76 | $12,486 | $65 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 31 | $4,962 | $94 |
| Hospital discharge day management, more than 30 minutes | 47 | $4,938 | $99 |
| Short return visit (20+ min) | 38 | $2,637 | $69 |
| Return visit (30+ min) | 20 | $1,887 | $94 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 14 | $1,711 | $122 |
| Hospital observation care on day of discharge | 24 | $1,605 | $67 |
| Hospital discharge day management, 30 minutes or less | 22 | $1,605 | $67 |
| Short return visit | 11 | $469 | $39 |
Drugs they prescribed that Part D paid
$8,599
Pharmacies billed $8,599 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
154 generic and 15 brand-name prescriptions · $8,599 in drug cost · 32 antibiotic prescriptions to 28 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.
| Amoxicillin-Clavulanate Potass | 12 | $110 | $9 |
Year by year
| 2024 | 169 | 81 | None | 9% | $8,599 |
| 2023 | 161 | 89 | 7% (11) | 12% | $10,487 |
| 2022 | 185 | 103 | 8% (14) | None | $8,667 |
| 2021 | 196 | 107 | None | None | $5,814 |
| 2020 | 146 | 82 | None | None | $7,564 |
| 2019 | 210 | 120 | None | 18% | $11,365 |
| 2018 | 122 | 65 | None | 15% | $5,022 |
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
| Pantoprazole | 13 | $177 | $14 |
| Amoxicillin-Clavulanate Potass | 12 | $174 | $15 |
2022: 2 drugs
| Amoxicillin-Clavulanate Potass | 19 | $336 | $18 |
| Furosemide | 14 | $62 | $4 |
2021: 3 drugs
| Pantoprazole | 16 | $275 | $17 |
| Amoxicillin-Clavulanate Potass | 26 | $258 | $10 |
| Prednisone | 13 | $75 | $6 |
2020: 1 drug
| Amoxicillin-Clavulanate Potass | 11 | $51 | $5 |
2019: 4 drugs
| Amoxicillin-Clavulanate Potass | 12 | $116 | $10 |
| Clopidogrel | 11 | $109 | $10 |
| Prednisone | 16 | $71 | $4 |
| Furosemide | 12 | $67 | $6 |
Professional record
- NPI
- 1861527343
- Licence
- CA G080235California G80235: Current · expires 2028-08-31
- Trained
- University of Southern California Keck School of Medicine, 1993
- Gender
- Male
More record details
- Sole proprietor
- No
- Taxonomy
- Hospitalist (208M00000X); Internal medicine (207R00000X)
- Mailing address
- 325 Distel Cir, Los Altos, CA, 94022
- NPI first listed
- 2007-02-23
- NPI last updated
- 2021-02-25
- NPI record certified
- 2021-02-25
This is when the NPI record was last certified, not a medical board exam.