Trisha J Ma, MD
Emergency Medicine · South San Francisco
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- Not verified
- Not the same as out of network.
- Office
- 1
Offices
1 location · Permanente Medical Group Inc · 10,928 clinicians in this group
Hospitals listed: Kaiser Foundation Hospital - South San Francisco. That is not proof they admit you there this week.
Plan participation
Not verified
We could not verify current plan participation for this doctor. This does not mean they are out of network. Call Dr. Ma’s office at (650) 742-2000 to ask if they take your plan before you enroll.
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.
- Kaiser Foundation Hospital - South San FranciscoSouth San Francisco, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Kaiser Permanente, which runs 41 hospitals in 3 statesPatients rate it 4 of 5 · 74% would definitely recommend itOverall rating: 4 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0, Oct 2024 – Sep 2025
See every measure and the patient survey for Kaiser Foundation Hospital - South San Francisco
Behind the star rating — Deaths: 0 better, 1 the same, 0 worse of 1 measures. Safety: 1 better, 5 the same, 0 worse of 6 measures. Readmissions: 0 better, 1 the same, 0 worse of 1 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 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 1.04 (0 to 2.12) · 89 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 0.97 (0.49 to 1.46) | No different | Jul 2022 – Jun 2024 |
| Death rate for stroke patientsComplications and deaths | 14.3 · 195 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 3.7 · 1,992 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.21 (0 to 0.44) · 562 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.31 (0.1 to 0.53) · 589 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 3.37 (0.77 to 5.96) · 64 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.66 (0 to 3.39) · 26 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.31 (0.58 to 4.04) · 57 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 8.99 (0 to 18.96) · 27 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.49 (0 to 1.68) · 433 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 3.1 · 108 cases | None | Apr 2023 – Mar 2025 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.772 | No different | Oct 2024 – Sep 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.867 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 0 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 14.9 · 75 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 22.4 · 520 cases | None | Jul 2023 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 21.2 · 562 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 5.3 · 111 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 21 · 149 cases | None | Jul 2023 – Jun 2025 |
What patients said (553 patients answered, 27% of those asked)
| Cleanliness | 4 |
| Nurse communication | 3 |
| Doctor communication | 4 |
| Communication about medicines | 3 |
| Discharge information | 4 |
| Overall hospital rating | 4 |
| Quietness | 2 |
| Recommend hospital | 4 |
| Room was "always" clean | 74% |
| Nurses "always" communicated well | 77% |
| Doctors "always" communicated well | 82% |
| Staff "always" explained | 61% |
| Yes, staff "did" give patients this information | 87% |
| Yes, staff "did" give patients information about help after discharge | 87% |
| Doctors "always" explained things so they could understand | 78% |
| Doctors "always" listened carefully | 81% |
| Doctors "always" treated them with courtesy and respect | 87% |
| Patients who gave a rating of "9" or "10" (high) | 73% |
| Staff "always" explained new medications | 71% |
| Nurses "always" explained things so they could understand | 71% |
| Nurses "always" listened carefully | 75% |
| Nurses "always" treated them with courtesy and respect | 85% |
| "Always" quiet at night | 39% |
| "YES", patients would definitely recommend the hospital | 74% |
| Staff "always" explained possible side effects | 50% |
| Yes, staff "did" give patients information about possible symptoms | 87% |
Original Medicare doctor bills
$1,395
Medicare paid this office $1,395 for 19 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Emergency department visit with moderate level of medical decision making | 11 | $862 | $72 |
Who their Medicare patients are
19 Original Medicare patients in 2024. Average age 69 · Health risk score 1.56. At or below the middle of the specialty; the typical emergency medicine clinician is at 2.01.
Conditions among them: High blood pressure 68%.
The office billed $12,048, Medicare allowed $2,480 and paid $1,395; for 22 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 | 19 | 22 | 69 | 1.56 | $12,048 | $1,395 |
| 2023 | 15 | 18 | 67 | 2.08 | $10,573 | $1,419 |
| 2022 | 28 | 28 | 65 | 1.80 | $15,556 | $2,697 |
| 2021 | 20 | 20 | 64 | 1.28 | $7,940 | $1,325 |
| 2019 | 11 | 11 | 70 | 1.23 | $4,950 | $523 |
| 2018 | 13 | 14 | 63 | 2.67 | $5,530 | $963 |
| 2017 | 30 | 32 | 70 | 1.15 | $11,725 | $1,775 |
| 2016 | 19 | 22 | 69 | 2.34 | $8,064 | $1,762 |
| 2015 | 13 | 13 | 70 | 1.17 | $5,368 | $1,016 |
| 2014 | 16 | 17 | 65 | 1.44 | $7,736 | $1,374 |
| 2013 | 11 | 13 | 73 | 1.00 | $5,813 | $979 |
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
| Emergency department visit with moderate level of medical decision making | 14 | $1,246 | $78 |
2022: 2 services
| Emergency department visit with high level of medical decision making | 12 | $1,630 | $136 |
| Emergency department visit with moderate level of medical decision making | 12 | $943 | $79 |
2021: 1 service
| Emergency department visit with moderate level of medical decision making | 14 | $1,200 | $86 |
2018: 1 service
| Emergency department visit with moderate level of medical decision making | 11 | $884 | $80 |
2017: 1 service
| Emergency department visit with moderate level of medical decision making | 21 | $1,450 | $69 |
2016: 1 service
| Emergency department visit with moderate level of medical decision making | 14 | $1,282 | $92 |
2015: 1 service
| Emergency department visit with moderate level of medical decision making | 11 | $911 | $83 |
2014: 1 service
| Emergency department visit with moderate level of medical decision making | 13 | $1,104 | $85 |
Medicaid work
$15,693 in 2024
Medicaid paid $15,693 for 167 billed services this clinician did in 2024, up to 21 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 MOD MDM | 75 | $10,309 |
| EMERGENCY DEPT VISIT LOW MDM | 92 | $5,384 |
| 2024 | 167 | 2 | 21 | $15,693 |
| 2023 | 208 | 2 | 24 | $5,639 |
| 2022 | 150 | 1 | 21 | $7,579 |
| 2021 | 80 | 1 | 28 | $3,209 |
| 2020 | 14 | 1 | 14 | $478 |
| 2019 | 43 | 1 | 17 | $1,018 |
| 2018 | 25 | 1 | 13 | $882 |
See the largest Medicaid services in earlier years
2023
| EMERGENCY DEPT VISIT MOD MDM | 146 | $4,457 |
| EMERGENCY DEPT VISIT LOW MDM | 62 | $1,182 |
2022
| EMERGENCY DEPT VISIT MOD MDM | 150 | $7,579 |
2021
| EMERGENCY DEPT VISIT MOD MDM | 80 | $3,209 |
2020
| EMERGENCY DEPT VISIT MOD MDM | 14 | $478 |
2019
| EMERGENCY DEPT VISIT MOD MDM | 43 | $1,018 |
2018
| EMERGENCY DEPT VISIT MOD MDM | 25 | $882 |
Drugs they prescribed that Part D paid
$4,195
Pharmacies billed $4,195 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
151 generic and 18 brand-name prescriptions · $4,195 in drug cost · 38 antibiotic prescriptions to 34 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.
| Prednisone | 19 | $119 | $6 |
Year by year
| 2024 | 169 | 129 | None | 11% | $4,195 |
| 2023 | 209 | 156 | 7% (14) | None | $6,667 |
| 2022 | 205 | 153 | 18% (36) | 9% | $2,910 |
| 2021 | 166 | 111 | 21% (35) | 13% | $4,872 |
| 2020 | 102 | 75 | 13% (13) | None | $2,275 |
| 2019 | 124 | 97 | 13% (16) | 16% | $3,045 |
| 2018 | 134 | 96 | 15% (20) | None | $3,289 |
| 2017 | 173 | 117 | 16% (28) | 15% | $5,067 |
| 2016 | 198 | 120 | 11% (21) | 14% | $6,314 |
| 2015 | 225 | 164 | 18% (41) | 10% | $6,215 |
| 2014 | 155 | 112 | 27% (41) | 9% | $3,108 |
| 2013 | 141 | 99 | 18% (25) | None | $2,521 |
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
| Cephalexin | 20 | $204 | $10 |
| Prednisone | 22 | $146 | $7 |
2022: 4 drugs
| Hydrocodone-Acetaminophen | 20 | $138 | $7 |
| Cephalexin | 12 | $135 | $11 |
| Prednisone | 15 | $101 | $7 |
| Oxycodone | 12 | $71 | $6 |
2021: 2 drugs
| Hydrocodone-Acetaminophen | 27 | $170 | $6 |
| Prednisone | 11 | $92 | $8 |
2020: 2 drugs
| Cephalexin | 15 | $179 | $12 |
| Hydrocodone-Acetaminophen | 11 | $79 | $7 |
2019: 1 drug
| Hydrocodone-Acetaminophen | 13 | $90 | $7 |
2018: 2 drugs
| Cephalexin | 14 | $154 | $11 |
| Hydrocodone-Acetaminophen | 16 | $136 | $8 |
2017: 3 drugs
| Hydrocodone-Acetaminophen | 21 | $234 | $11 |
| Cephalexin | 16 | $181 | $11 |
| Prednisone | 12 | $120 | $10 |
2016: 4 drugs
| Hydrocodone-Acetaminophen | 16 | $222 | $14 |
| Lorazepam | 13 | $145 | $11 |
| Cephalexin | 12 | $114 | $9 |
| Ondansetron Odt | 12 | $107 | $9 |
2015: 4 drugs
| Hydrocodone-Acetaminophen | 30 | $363 | $12 |
| Cephalexin | 21 | $228 | $11 |
| Ciprofloxacin | 17 | $153 | $9 |
| Lorazepam | 13 | $105 | $8 |
2014: 2 drugs
| Hydrocodone-Acetaminophen | 36 | $320 | $9 |
| Lorazepam | 12 | $88 | $7 |
2013: 2 drugs
| Hydrocodone-Acetaminophen | 21 | $209 | $10 |
| Lorazepam | 13 | $98 | $8 |
Professional record
- NPI
- 1578695144
- Trained
- Stanford University School of Medicine, 2006
- Gender
- Female
More record details
- Sole proprietor
- No
- Taxonomy
- Student in a training program (390200000X)
- Mailing address
- 701 Welch Rd, Bldg C, Palo Alto, CA, 94304
- NPI first listed
- 2007-03-09
- NPI last updated
- 2021-12-17
- NPI record certified
- 2021-12-17
This is when the NPI record was last certified, not a medical board exam.
This office lists an electronic records connection.