Ashley S Peterson, PA
Physician Assistant · Burlingame
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- Not verified
- Not the same as out of network.
- Offices
- 2
Offices
2 locations · Sutter Bay Medical Foundation · 3,783 clinicians in this group
Hospitals listed: Mills-Peninsula Medical Center. 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 Ashley S Peterson’s office to ask if they take your plan before you enroll.
California Medical Board record
Licence G59015 · Current
Licensed to practise in California · since 2011 · expires 2027-03-31 · New York Medical College.
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.
- Peninsula Medical CenterBurlingame, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of Sutter Health, which runs 27 hospitals in 2 statesPatients rate it 4 of 5 · 78% would definitely recommend itOverall rating: 5 of 5 starsBetter than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.139, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.242, Oct 2024 – Sep 2025
See every measure and the patient survey for Peninsula Medical Center
Behind the star rating — Deaths: 2 better, 6 the same, 0 worse of 8 measures. Safety: 2 better, 5 the same, 0 worse of 7 measures. Readmissions: 0 better, 10 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.
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.139 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.242 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 1.21 (0.27 to 2.15) · 1,258 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 0.81 (0.51 to 1.1) | No different | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 155.44 (112.67 to 198.21) · 90 cases | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 2.5 · 32 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 7.1 · 82 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 10 · 188 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 9 · 473 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 14.8 · 342 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 9.4 · 485 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 2.9 · 3,730 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.2 (0 to 0.4) · 6,904 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.21 (0.02 to 0.4) · 7,052 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 3.41 (1.43 to 5.39) · 1,695 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.72 (0.17 to 3.28) · 665 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.11 (0.66 to 3.56) · 1,545 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 7.1 (1.3 to 12.9) · 670 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 5.96 (2.63 to 9.29) · 653 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.61 (0.15 to 3.08) · 418 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.14 (0 to 0.78) · 5,539 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 3.7 · 192 cases | None | Apr 2023 – Mar 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.215 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0.263 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 0.74 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 14.3 · 300 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 19 · 702 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | 1.2 · 207 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -13.6 · 531 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 24.3 · 343 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 18.1 · 449 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 4.5 (2.8 to 7) · 85 cases | No different | Jan 2024 – Dec 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 9.6 (6.7 to 13.7) · 85 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 5.7 · 189 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 11 · 45 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 20.6 · 117 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 13 (9.7 to 17.2) · 584 cases | No different | Jan 2022 – Dec 2024 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 0.9 (0.7 to 1.2) · 764 cases | No different | Jan 2024 – Dec 2024 |
What patients said (523 patients answered, 27% of those asked)
| Cleanliness | 4 |
| Nurse communication | 4 |
| Doctor communication | 4 |
| Communication about medicines | 3 |
| Discharge information | 4 |
| Overall hospital rating | 4 |
| Quietness | 3 |
| Recommend hospital | 5 |
| Room was "always" clean | 76% |
| Nurses "always" communicated well | 81% |
| Doctors "always" communicated well | 80% |
| Staff "always" explained | 58% |
| Yes, staff "did" give patients this information | 89% |
| Yes, staff "did" give patients information about help after discharge | 87% |
| Doctors "always" explained things so they could understand | 74% |
| Doctors "always" listened carefully | 79% |
| Doctors "always" treated them with courtesy and respect | 87% |
| Patients who gave a rating of "9" or "10" (high) | 75% |
| Staff "always" explained new medications | 72% |
| Nurses "always" explained things so they could understand | 77% |
| Nurses "always" listened carefully | 79% |
| Nurses "always" treated them with courtesy and respect | 88% |
| "Always" quiet at night | 54% |
| "YES", patients would definitely recommend the hospital | 78% |
| Staff "always" explained possible side effects | 44% |
| Yes, staff "did" give patients information about possible symptoms | 90% |
Original Medicare doctor bills
$2,931
Medicare paid this office $2,931 for 30 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
Who their Medicare patients are
30 Original Medicare patients in 2024. Average age 75 · Health risk score 0.82. At or below the middle of the specialty; the typical physician assistant clinician is at 1.31.
Conditions among them: High blood pressure 73%.
The office billed $16,891, Medicare allowed $3,992 and paid $2,931; for 97 services of 24 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 | 30 | 97 | 75 | 0.82 | $16,891 | $2,931 |
| 2023 | 57 | 274 | 76 | 0.99 | $44,306 | $9,378 |
| 2022 | 165 | 448 | 75 | 0.90 | $431,931 | $30,743 |
| 2021 | 80 | 182 | 74 | 0.77 | $259,738 | $16,120 |
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: 2 services
| Replacement of knee joint, both sides of knee | 11 | $1,723 | $157 |
| Return visit (30+ min) | 11 | $1,122 | $102 |
2022: 13 services
| Return visit (30+ min) | 39 | $4,081 | $102 |
| Short return visit (20+ min) | 49 | $3,919 | $69 |
| Replacement of knee joint, both sides of knee | 23 | $3,612 | $157 |
| Prosthetic repair of shoulder joint, total shoulder | 18 | $3,025 | $168 |
| Hyaluronan or derivative, euflexxa, for intra-articular injection, per dose | 14 | $2,231 | None |
| Aspiration and/or injection of fluid from large joint | 36 | $2,119 | $44 |
| Telephone medical discussion with physician, 21-30 minutes | 23 | $1,927 | $84 |
| X-ray of knee, 1-2 views | 25 | $908 | $30 |
| Short return visit | 21 | $891 | $37 |
| X-ray of shoulder, minimum of 2 views | 19 | $612 | $31 |
| X-ray of knee, 3 views | 14 | $473 | $32 |
| Shaving of part of shoulder bone and repair of ligament using an endoscope | 11 | $227 | $21 |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 15 | $36 | None |
2021: 6 services
| Replacement of knee joint, both sides of knee | 13 | $2,071 | $159 |
| Prosthetic repair of shoulder joint, total shoulder | 11 | $1,979 | $180 |
| Return visit (30+ min) | 19 | $1,975 | $104 |
| Telephone medical discussion with physician, 21-30 minutes | 11 | $1,146 | $104 |
| Short return visit (20+ min) | 14 | $1,031 | $74 |
| X-ray of shoulder, minimum of 2 views | 15 | $448 | $30 |
Drugs they prescribed that Part D paid
$5,259
Pharmacies billed $5,259 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 17% of their Part D prescriptions (33 of 191) in 2024. Above the middle of the specialty; the typical physician assistant clinician is at 1%.
180 generic and 11 brand-name prescriptions · $5,259 in drug cost · 47 antibiotic prescriptions to 32 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.
| Lidocaine | 23 | $2,681 | $117 |
| Celecoxib | 31 | $742 | $24 |
| Diclofenac | 13 | $550 | $42 |
| Ondansetron | 12 | $102 | $9 |
| Amoxicillin | 34 | $98 | $3 |
See all 6 drugs
| Lidocaine | 23 | $2,681 | $117 |
| Celecoxib | 31 | $742 | $24 |
| Diclofenac | 13 | $550 | $42 |
| Ondansetron | 12 | $102 | $9 |
| Amoxicillin | 34 | $98 | $3 |
| Oxycodone | 23 | $96 | $4 |
Year by year
| 2024 | 191 | 74 | 17% (33) | 6% | $5,259 |
| 2023 | 297 | 128 | 34% (101) | None | $5,489 |
| 2022 | 320 | 119 | 44% (140) | None | $6,556 |
| 2021 | 142 | 64 | 45% (64) | None | $2,949 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 9 drugs
| Celecoxib | 26 | $1,335 | $51 |
| Diclofenac | 27 | $669 | $25 |
| Hydrocodone-Acetaminophen | 42 | $394 | $9 |
| Ondansetron | 31 | $290 | $9 |
| Amoxicillin | 43 | $154 | $4 |
| Oxycodone | 21 | $115 | $5 |
| Tramadol | 26 | $105 | $4 |
| Ibuprofen | 11 | $55 | $5 |
| Famotidine | 11 | $51 | $5 |
2022: 6 drugs
| Oxycodone | 99 | $1,178 | $12 |
| Ondansetron | 83 | $921 | $11 |
| Celecoxib | 13 | $586 | $45 |
| Diclofenac | 43 | $580 | $13 |
| Hydrocodone-Acetaminophen | 18 | $191 | $11 |
| Tramadol | 19 | $47 | $2 |
2021: 4 drugs
| Oxycodone | 38 | $353 | $9 |
| Ondansetron | 34 | $325 | $10 |
| Diclofenac | 14 | $176 | $13 |
| Hydrocodone-Acetaminophen | 16 | $119 | $7 |
Money from drug and device companies
$403 in 2025
| 2025 | 4 | 6 | None | $403 |
| 2024 | 1 | 1 | None | $43 |
| 2023 | 2 | 2 | None | $153 |
| 2022 | 1 | 1 | None | $14 |
| 2021 | 3 | 3 | None | $149 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Madrigal Pharmaceuticals | Rezdiffra | $130 | 1 payment
|
| Medical Device Business Services | None | $123 | 3 payments
|
| Vertex Pharmaceuticals | Journavx | $118 | 1 payment
|
| Stryker | Gamma | $32 | 1 payment
|
See all 6 published payments
| Madrigal Pharmaceuticals | Meals · 2025-11-20 | Rezdiffra | $130 |
| Vertex Pharmaceuticals | Meals · 2025-09-18 | Journavx | $118 |
| Medical Device Business Services | Education · 2025-05-23 | None | $59 |
| Medical Device Business Services | Education · 2025-04-23 | None | $50 |
| Stryker | Meals · 2025-04-09 | Gamma | $32 |
| Medical Device Business Services | Education · 2025-03-31 | None | $14 |
See earlier years (2024, 2023, 2022, 2021)
2024: $43
| Bioventus | Durolane | $43 | 1 payment
|
2023: $153
| Amgen | Evenity | $118 | 1 payment
|
| Sanofi-Aventis U.S. | Synvisc-One | $35 | 1 payment
|
2022: $14
| Baudax Bio | Anjeso | $14 | 1 payment
|
2021: $149
| Zimmer Biomet Holdings | Accufill | $117 | 1 payment
|
| Heron Therapeutics | Zynrelef | $19 | 1 payment
|
| AbbVie | Synthroid | $13 | 1 payment
|
Checkups this office reported
Medicare did not publish checkup rates for this clinician.
- Medicare’s overall office score
- 96.5 / 100
- Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.
Professional record
- NPI
- 1104455773
- Licence
- CA 59015California G59015: Current · expires 2027-03-31
- Gender
- Female
More record details
- Sole proprietor
- Yes
- Taxonomy
- Physician assistant (363A00000X)
- Mailing address
- 325 Distel Cir, Los Altos, CA, 94022
- NPI first listed
- 2020-04-06
- NPI last updated
- 2024-07-31
- NPI record certified
- 2024-07-31
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 1 Shrader St Ste 650, San Francisco, CA, 94117