Katharina Abernethy, PA
Physician Assistant · Windsor
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 3
- 1 carrier
- Offices
- 4
Offices
4 locations · Providence Medical Foundation · Permanente Medical Group Inc
Hospitals listed: Providence Santa Rosa Memorial Hospital. That is not proof they admit you there this week.
Plans that list them
3 plans · 1 carrier
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Katharina Abernethy’s office to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
| Imperial Courage Plan (HMO) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
| Imperial Dynamic Plan (HMO) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
| Imperial Senior Value (HMO C-SNP) | Imperial Health Plan of California, Inc. | Listed | Sep 1, 2026 |
California Medical Board record
Licence C51580 · Current
Licensed to practise in California · since 2004 · expires 2028-05-31 · Ben-Gurion University of the Negev-Irving and Joyce Goldman School of Med.
Matched on the licence number without its letter prefix; check the name before relying on it.
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.
- Providence Santa Rosa Memorial HospitalSanta Rosa, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of Providence, which runs 54 hospitals in 7 statesPatients rate it 3 of 5 · 69% would definitely recommend itOverall rating: 3 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.375, Oct 2024 – Sep 2025
See every measure and the patient survey for Providence Santa Rosa Memorial Hospital
Behind the star rating — Deaths: 0 better, 8 the same, 0 worse of 8 measures. Safety: 1 better, 6 the same, 0 worse of 7 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.
| Clostridium Difficile (C.Diff)Infections | 0.375 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 1.19 (0.26 to 2.13) · 1,736 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 0.76 (0.48 to 1.03) | No different | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 181.27 (137.92 to 224.62) · 109 cases | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 2.1 · 72 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 8.8 · 129 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 12.3 · 226 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 11.2 · 530 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 13.2 · 448 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 8.3 · 245 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 3.2 · 2,733 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.22 (0.03 to 0.4) · 8,115 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.23 (0.04 to 0.41) · 8,057 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 2.37 (0.56 to 4.18) · 2,186 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.59 (0.1 to 3.08) · 772 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.27 (0.9 to 3.63) · 1,999 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 5.74 (0.06 to 11.42) · 810 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 4.04 (0.53 to 7.55) · 768 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.8 (0.38 to 3.21) · 401 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.46 (0 to 1) · 7,051 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 3.3 · 77 cases | None | Apr 2023 – Mar 2025 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.915 | No different | Oct 2024 – Sep 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.552 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0.297 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 1.353 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 13.1 · 288 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 20.5 · 489 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | 0.4 · 259 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -0.4 · 580 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 7.5 · 456 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 17.2 · 431 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 6.4 (4.9 to 8.3) · 584 cases | No different | Jan 2024 – Dec 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 10.3 (8.2 to 12.7) · 584 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 6.1 · 72 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 9.4 · 64 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 20.2 · 133 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 13.5 (10.8 to 16.7) · 2,810 cases | No different | Jan 2022 – Dec 2024 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 1.2 (1 to 1.5) · 780 cases | No different | Jan 2024 – Dec 2024 |
What patients said (473 patients answered, 23% of those asked)
| Cleanliness | 4 |
| Nurse communication | 3 |
| Doctor communication | 2 |
| Communication about medicines | 2 |
| Discharge information | 3 |
| Overall hospital rating | 3 |
| Quietness | 1 |
| Recommend hospital | 4 |
| Room was "always" clean | 71% |
| Nurses "always" communicated well | 76% |
| Doctors "always" communicated well | 74% |
| Staff "always" explained | 56% |
| Yes, staff "did" give patients this information | 87% |
| Yes, staff "did" give patients information about help after discharge | 85% |
| Doctors "always" explained things so they could understand | 68% |
| Doctors "always" listened carefully | 72% |
| Doctors "always" treated them with courtesy and respect | 82% |
| Patients who gave a rating of "9" or "10" (high) | 66% |
| Staff "always" explained new medications | 68% |
| Nurses "always" explained things so they could understand | 72% |
| Nurses "always" listened carefully | 72% |
| Nurses "always" treated them with courtesy and respect | 85% |
| "Always" quiet at night | 37% |
| "YES", patients would definitely recommend the hospital | 69% |
| Staff "always" explained possible side effects | 45% |
| Yes, staff "did" give patients information about possible symptoms | 89% |
Original Medicare doctor bills
$2,054
Medicare paid this office $2,054 for 55 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Short return visit (20+ min) | 38 | $1,658 | $44 |
Who their Medicare patients are
55 Original Medicare patients in 2024. Average age 73 · Women 73% · Also on Medicaid 26% · Health risk score 1.29. At or below the middle of the specialty; the typical physician assistant clinician is at 1.31.
Conditions among them: High blood pressure 58% · Chronic kidney disease 22% · Diabetes 20% · Coronary heart disease 20% · Depression 20%.
The office billed $10,930, Medicare allowed $2,990 and paid $2,054; for 55 services of 5 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 | 55 | 55 | 73 | 1.29 | $10,930 | $2,054 |
| 2023 | 11 | 12 | 73 | 0.70 | $2,660 | $1,117 |
| 2022 | 114 | 126 | 74 | 1.01 | $27,604 | $9,898 |
| 2021 | 397 | 451 | 72 | 1.08 | $94,606 | $38,165 |
| 2020 | 241 | 269 | 70 | 1.28 | $59,604 | $18,298 |
| 2019 | 302 | 370 | 72 | 1.36 | $116,814 | $25,551 |
| 2018 | 300 | 385 | 70 | 1.47 | $148,871 | $25,252 |
| 2017 | 223 | 266 | 67 | 1.42 | $98,221 | $16,775 |
| 2016 | 352 | 438 | 66 | 1.33 | $158,657 | $27,757 |
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
2022: 4 services
| New patient visit (30+ min) | 39 | $2,996 | $77 |
| New patient visit (45+ min) | 29 | $2,825 | $97 |
| Return visit (30+ min) | 19 | $1,789 | $94 |
| Short return visit (20+ min) | 23 | $1,396 | $58 |
2021: 4 services
| Return visit (30+ min) | 153 | $15,702 | $96 |
| Short return visit (20+ min) | 130 | $8,868 | $68 |
| New patient visit (30+ min) | 60 | $4,922 | $81 |
| New patient visit (45+ min) | 37 | $4,427 | $120 |
2020: 3 services
| Return visit (30+ min) | 186 | $13,372 | $70 |
| Short return visit (20+ min) | 36 | $1,876 | $51 |
| New patient visit (30+ min) | 16 | $620 | $39 |
2019: 7 services
| Return visit (30+ min) | 99 | $7,657 | $76 |
| Emergency department visit with high level of medical decision making | 46 | $5,155 | $112 |
| Emergency department visit with moderate level of medical decision making | 38 | $2,727 | $72 |
| Emergency department visit with low level of medical decision making | 58 | $2,280 | $39 |
| Short return visit (20+ min) | 33 | $1,621 | $49 |
| New patient visit (30+ min) | 22 | $1,486 | $68 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 12 | $65 | $5 |
2018: 4 services
| Emergency department visit with high level of medical decision making | 81 | $9,528 | $115 |
| Emergency department visit with moderate level of medical decision making | 90 | $6,663 | $74 |
| Emergency department visit with low level of medical decision making | 125 | $5,201 | $40 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 32 | $191 | $6 |
2017: 4 services
| Emergency department visit with high level of medical decision making | 49 | $5,770 | $115 |
| Emergency department visit with moderate level of medical decision making | 64 | $4,879 | $75 |
| Emergency department visit with low level of medical decision making | 106 | $4,153 | $39 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 20 | $112 | $6 |
2016: 5 services
| Emergency department visit with moderate level of medical decision making | 98 | $8,084 | $79 |
| Emergency department visit with low level of medical decision making | 186 | $7,920 | $41 |
| Emergency department visit with high level of medical decision making | 66 | $7,787 | $118 |
| Simple repair of surface wound of scalp, neck, underarms, trunk, arms, or legs, 2.5 cm or less | 12 | $306 | $25 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 20 | $117 | $6 |
Medicaid work
$20,818 in 2019
Medicaid paid $20,818 for 404 billed services this clinician did in 2019, up to 67 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.
| EMERGENCY DEPT VISIT LOW MDM | 292 | $12,894 |
| EMERGENCY DEPT VISIT MOD MDM | 97 | $6,379 |
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 15 | $1,545 |
| 2019 | 404 | 3 | 67 | $20,818 |
| 2018 | 899 | 3 | 70 | $49,093 |
See the largest Medicaid services in earlier years
2018
| EMERGENCY DEPT VISIT LOW MDM | 606 | $26,848 |
| EMERGENCY DEPT VISIT MOD MDM | 231 | $15,652 |
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 62 | $6,593 |
Drugs they prescribed that Part D paid
$130,276
Pharmacies billed $130,276 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 1,004) in 2024. At or below the middle of the specialty; the typical physician assistant clinician is at 1%.
892 generic and 112 brand-name prescriptions · $130,276 in drug cost · 26 antibiotic prescriptions to 24 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.
| Relistor | 12 | $29,827 | $2,486 |
| Xifaxan | 11 | $25,508 | $2,319 |
| Gavilyte-C | 590 | $13,347 | $23 |
| Lubiprostone | 68 | $8,964 | $132 |
| Sutab | 14 | $1,955 | $140 |
See all 9 drugs
| Relistor | 12 | $29,827 | $2,486 |
| Xifaxan | 11 | $25,508 | $2,319 |
| Gavilyte-C | 590 | $13,347 | $23 |
| Lubiprostone | 68 | $8,964 | $132 |
| Sutab | 14 | $1,955 | $140 |
| Sucralfate | 38 | $1,712 | $45 |
| Pantoprazole | 95 | $974 | $10 |
| Gavilyte-G | 37 | $974 | $26 |
| Buspirone | 20 | $303 | $15 |
Year by year
| 2024 | 1,004 | 750 | 0% (0) | 11% | $130,276 |
| 2023 | 714 | 611 | 0% (0) | 9% | $76,608 |
| 2022 | 251 | 200 | None | None | $5,208 |
| 2021 | 226 | 168 | None | None | $2,979 |
| 2020 | 135 | 95 | None | 11% | $2,636 |
| 2019 | 153 | 115 | 10% (15) | None | $2,524 |
| 2018 | 157 | 102 | 16% (25) | None | $3,294 |
| 2017 | 124 | 88 | 14% (17) | None | $1,131 |
| 2016 | 158 | 109 | 20% (32) | None | $2,856 |
| 2015 | 114 | 61 | 20% (23) | None | $1,769 |
| 2014 | 34 | 21 | None | None | $356 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 7 drugs
| Xifaxan | 12 | $27,041 | $2,253 |
| Gavilyte-C | 476 | $9,952 | $21 |
| Linzess | 11 | $8,048 | $732 |
| Lubiprostone | 22 | $2,001 | $91 |
| Gavilyte-G | 55 | $1,398 | $25 |
| Peg-3350 and Electrolytes | 15 | $377 | $25 |
| Pantoprazole | 24 | $210 | $9 |
2022: 6 drugs
| Diclofenac | 42 | $1,127 | $27 |
| Gavilyte-C | 31 | $601 | $19 |
| Triamcinolone Acetonide | 13 | $295 | $23 |
| Cephalexin | 20 | $230 | $11 |
| Doxycycline Monohydrate | 18 | $163 | $9 |
| Azithromycin | 11 | $64 | $6 |
2021: 6 drugs
| Doxycycline Hyclate | 19 | $395 | $21 |
| Nitrofurantoin Mono-Macro | 15 | $224 | $15 |
| Doxycycline Monohydrate | 18 | $192 | $11 |
| Cephalexin | 32 | $171 | $5 |
| Triamcinolone Acetonide | 11 | $76 | $7 |
| Sulfamethoxazole-Trimethoprim | 12 | $50 | $4 |
2020: 3 drugs
| Erythromycin | 11 | $144 | $13 |
| Cephalexin | 14 | $67 | $5 |
| Prednisone | 11 | $36 | $3 |
2019: 3 drugs
| Cephalexin | 27 | $197 | $7 |
| Nitrofurantoin Mono-Macro | 12 | $191 | $16 |
| Sulfamethoxazole-Trimethoprim | 15 | $75 | $5 |
2018: 3 drugs
| Cephalexin | 15 | $141 | $9 |
| Sulfamethoxazole-Trimethoprim | 12 | $89 | $7 |
| Hydrocodone-Acetaminophen | 12 | $60 | $5 |
2016: 3 drugs
| Hydrocodone-Acetaminophen | 28 | $170 | $6 |
| Fluticasone Propionate | 14 | $155 | $11 |
| Ibuprofen | 21 | $91 | $4 |
2015: 2 drugs
| Hydrocodone-Acetaminophen | 17 | $94 | $6 |
| Ibuprofen | 19 | $78 | $4 |
Professional record
- NPI
- 1518039536
- Licence
- CA 51580, CA AT 8069California C51580: Current · expires 2028-05-31
- Group
- Providence Medical Foundation · Permanente Medical Group Inc
- Gender
- Female
More record details
- Sole proprietor
- No
- Taxonomy
- Physician assistant (363A00000X); Federal specialty code 225200000X (225200000X)
- Mailing address
- 751 S Bascom Ave, San Jose, CA, 95128
- NPI first listed
- 2006-11-14
- NPI last updated
- 2022-05-26
- NPI record certified
- 2022-05-26
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 2044 Montecito Ave Apt 12, Mountain View, CA, 94043
This office lists an electronic records connection.