Ami Yamamoto, MD
Emergency Medicine · Berkeley
- 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
- 6
Offices
6 locations · Sutter Bay Medical Foundation · 3,783 clinicians in this group
Looking this up.
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. Yamamoto’s office to ask if they take your plan before you enroll.
California Medical Board record
Licence A128047 · Current
Licensed to practise in California · since 2013 · expires 2027-12-31 · Drexel University College of Medicine.
No disciplinary actions, convictions, malpractice judgments or citations in this record.
Original Medicare doctor bills
$32,850
Medicare paid this office $32,850 for 221 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| New patient visit (45+ min) | 51 | $7,828 | $153 |
| Emergency department visit with high level of medical decision making | 44 | $5,689 | $126 |
| Return visit (30+ min) | 41 | $4,710 | $115 |
| Critical care, first 30-74 minutes | 15 | $2,470 | $165 |
| Short return visit (20+ min) | 25 | $2,099 | $84 |
See all 10 services
| New patient visit (45+ min) | 51 | $7,828 | $153 |
| Emergency department visit with high level of medical decision making | 44 | $5,689 | $126 |
| Return visit (30+ min) | 41 | $4,710 | $115 |
| Critical care, first 30-74 minutes | 15 | $2,470 | $165 |
| Short return visit (20+ min) | 25 | $2,099 | $84 |
| New patient visit (30+ min) | 13 | $1,168 | $90 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 11 | $1,053 | $96 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 52 | $334 | $6 |
| Detection test by immunoassay with direct visual observation for streptococcus, group a (strep) | 13 | $211 | $16 |
| Automated urinalysis test | 17 | $40 | $2 |
Who their Medicare patients are
221 Original Medicare patients in 2024. Average age 73 · Under 65 10% · 85 and older 14% · Women 64% · Also on Medicaid 29% · Health risk score 1.43. At or below the middle of the specialty; the typical emergency medicine clinician is at 2.01.
Conditions among them: High blood pressure 74% · Diabetes 33% · Chronic kidney disease 29% · Coronary heart disease 23% · Depression 21% · COPD 18% · Atrial fibrillation 18% · Heart failure 17% · Cancer 16% · Stroke 11% · Dementia 7%.
The office billed $156,413, Medicare allowed $44,595 and paid $32,850; for 403 services of 49 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 | 403 | 73 | 1.43 | $156,413 | $32,850 |
| 2023 | 289 | 568 | 75 | 2.15 | $299,188 | $52,002 |
| 2022 | 214 | 370 | 72 | 2.08 | $210,819 | $37,455 |
| 2021 | 195 | 359 | 71 | 2.71 | $173,066 | $37,588 |
| 2020 | 465 | 896 | 71 | 2.60 | $377,876 | $84,570 |
| 2019 | 553 | 1,042 | 72 | 2.43 | $338,631 | $86,523 |
| 2018 | 531 | 1,086 | 69 | 2.66 | $328,981 | $83,167 |
| 2017 | 532 | 1,165 | 69 | 2.34 | $326,317 | $79,680 |
| 2016 | 570 | 1,162 | 70 | 2.38 | $351,541 | $85,539 |
| 2015 | 246 | 485 | 70 | 2.12 | $148,133 | $36,942 |
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: 7 services
| Emergency department visit with high level of medical decision making | 136 | $20,956 | $152 |
| Critical care, first 30-74 minutes | 67 | $13,235 | $198 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 44 | $7,144 | $162 |
| Emergency department visit with moderate level of medical decision making | 48 | $4,835 | $99 |
| Critical care, each additional 30 minutes | 17 | $2,727 | $101 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 190 | $1,492 | $7 |
| Electrocardiogram (ecg) 1 to 3 leads with review by physician only | 15 | $96 | $6 |
2022: 5 services
| Emergency department visit with high level of medical decision making | 135 | $22,508 | $166 |
| Critical care, first 30-74 minutes | 33 | $7,555 | $229 |
| Emergency department visit with moderate level of medical decision making | 28 | $2,538 | $91 |
| Initial hospital observation care per day, typically 70 minutes | 11 | $1,950 | $177 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 128 | $961 | $7 |
2021: 5 services
| Emergency department visit with high level of medical decision making | 121 | $20,176 | $167 |
| Critical care, first 30-74 minutes | 35 | $8,744 | $236 |
| Initial hospital observation care per day, typically 70 minutes | 15 | $2,716 | $181 |
| Emergency department visit with moderate level of medical decision making | 20 | $1,826 | $91 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 116 | $909 | $7 |
2020: 7 services
| Emergency department visit with high level of medical decision making | 288 | $44,382 | $151 |
| Critical care, first 30-74 minutes | 94 | $21,221 | $223 |
| Emergency department visit with moderate level of medical decision making | 56 | $5,527 | $99 |
| Initial hospital observation care per day, typically 70 minutes | 18 | $3,356 | $186 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 332 | $2,754 | $8 |
| Critical care, each additional 30 minutes | 12 | $2,163 | $120 |
| Emergency department visit with low level of medical decision making | 17 | $917 | $54 |
2019: 6 services
| Emergency department visit with high level of medical decision making | 351 | $53,204 | $147 |
| Critical care, first 30-74 minutes | 96 | $18,569 | $193 |
| Emergency department visit with moderate level of medical decision making | 76 | $7,628 | $100 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 392 | $3,110 | $8 |
| Emergency department visit with low level of medical decision making | 25 | $1,272 | $51 |
| X-ray of chest, 1 view | 23 | $189 | $8 |
2018: 6 services
| Emergency department visit with high level of medical decision making | 340 | $50,898 | $145 |
| Critical care, first 30-74 minutes | 82 | $16,114 | $194 |
| Emergency department visit with moderate level of medical decision making | 82 | $8,018 | $98 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 358 | $2,910 | $8 |
| Emergency department visit with low level of medical decision making | 35 | $1,729 | $49 |
| X-ray of chest, 1 view | 77 | $631 | $8 |
2017: 7 services
| Emergency department visit with high level of medical decision making | 299 | $42,682 | $140 |
| Critical care, first 30-74 minutes | 88 | $17,285 | $192 |
| Emergency department visit with moderate level of medical decision making | 83 | $8,617 | $98 |
| Emergency department visit with low level of medical decision making | 61 | $3,006 | $49 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 345 | $2,768 | $7 |
| X-ray of chest, 1 view, front | 138 | $1,131 | $8 |
| X-ray of chest, 2 views, front and side | 11 | $106 | $10 |
2016: 7 services
| Emergency department visit with high level of medical decision making | 316 | $45,401 | $143 |
| Critical care, first 30-74 minutes | 99 | $18,326 | $185 |
| Emergency department visit with moderate level of medical decision making | 87 | $8,421 | $97 |
| Emergency department visit with low level of medical decision making | 65 | $3,357 | $50 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 341 | $2,822 | $7 |
| X-ray of chest, 1 view, front | 67 | $534 | $8 |
| X-ray of chest, 2 views, front and side | 13 | $114 | $9 |
2015: 6 services
| Emergency department visit with high level of medical decision making | 163 | $24,232 | $145 |
| Critical care, first 30-74 minutes | 29 | $5,522 | $190 |
| Emergency department visit with moderate level of medical decision making | 32 | $3,248 | $98 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 159 | $1,226 | $7 |
| Emergency department visit with low level of medical decision making | 23 | $1,193 | $52 |
| X-ray of chest, 1 view, front | 28 | $232 | $8 |
Medicaid work
$7,488 in 2024
Medicaid paid $7,488 for 76 billed services this clinician did in 2024, up to 23 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.
| Clinic visit/encounter, all-inclusive | 24 | $5,353 |
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 25 | $1,944 |
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 27 | $191 |
| 2024 | 76 | 3 | 23 | $7,488 |
| 2023 | 418 | 3 | 25 | $14,302 |
| 2022 | 444 | 4 | 32 | $33,419 |
| 2021 | 586 | 5 | 35 | $32,200 |
| 2020 | 673 | 6 | 41 | $20,335 |
| 2019 | 486 | 4 | 27 | $19,453 |
| 2018 | 828 | 6 | 36 | $28,208 |
See the largest Medicaid services in earlier years
2023
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 213 | $11,807 |
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 178 | $1,363 |
| EMERGENCY DEPT VISIT MOD MDM | 27 | $1,132 |
2022
| Clinic visit/encounter, all-inclusive | 114 | $24,154 |
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 137 | $8,326 |
| Return visit (30+ min) | 130 | $527 |
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 63 | $412 |
2021
| Clinic visit/encounter, all-inclusive | 109 | $22,556 |
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 168 | $7,497 |
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 173 | $1,049 |
| EMERGENCY DEPT VISIT MOD MDM | 14 | $731 |
| Return visit (30+ min) | 122 | $368 |
2020
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 287 | $16,144 |
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 297 | $2,427 |
| EMERGENCY DEPT VISIT MOD MDM | 40 | $1,223 |
| EMERGENCY DEPT VISIT LOW MDM | 24 | $462 |
| COMPREHENSIVE METABOLIC PANEL | 12 | $46 |
| Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count | 13 | $33 |
2019
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 291 | $14,946 |
| EMERGENCY DEPT VISIT MOD MDM | 43 | $2,019 |
| EMERGENCY DEPT VISIT LOW MDM | 93 | $1,846 |
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 59 | $643 |
2018
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 360 | $19,921 |
| EMERGENCY DEPT VISIT MOD MDM | 119 | $5,223 |
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 179 | $1,715 |
| EMERGENCY DEPT VISIT LOW MDM | 72 | $1,280 |
| Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count | 16 | $69 |
| Service(s) provided between 10:00 PM and 8:00 AM at 24-hour facility, in addition to basic service | 82 | $0 |
Drugs they prescribed that Part D paid
$4,341
Pharmacies billed $4,341 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 5% of their Part D prescriptions (12 of 237) in 2024. At or below the middle of the specialty; the typical emergency medicine clinician is at 12%.
210 generic and 27 brand-name prescriptions · $4,341 in drug cost · 88 antibiotic prescriptions to 71 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.
| Albuterol Sulfate Hfa | 18 | $442 | $23 |
| Amoxicillin-Clavulanate Potass | 19 | $168 | $9 |
| Cephalexin | 21 | $102 | $5 |
| Mupirocin | 13 | $82 | $6 |
| Prednisone | 15 | $56 | $4 |
See all 6 drugs
| Albuterol Sulfate Hfa | 18 | $442 | $23 |
| Amoxicillin-Clavulanate Potass | 19 | $168 | $9 |
| Cephalexin | 21 | $102 | $5 |
| Mupirocin | 13 | $82 | $6 |
| Prednisone | 15 | $56 | $4 |
| Azithromycin | 12 | $43 | $4 |
Year by year
| 2024 | 237 | 152 | 5% (12) | 11% | $4,341 |
| 2023 | 144 | 99 | 13% (19) | None | $2,365 |
| 2022 | 147 | 95 | 10% (14) | 7% | $3,901 |
| 2021 | 96 | 72 | None | None | $1,679 |
| 2020 | 211 | 133 | 8% (16) | 10% | $4,675 |
| 2019 | 282 | 162 | 14% (40) | 13% | $7,434 |
| 2018 | 219 | 128 | 21% (46) | 11% | $3,382 |
| 2017 | 296 | 169 | 21% (62) | 11% | $4,740 |
| 2016 | 307 | 194 | 23% (70) | None | $6,213 |
| 2015 | 164 | 102 | 32% (53) | None | $3,489 |
| 2014 | 38 | 24 | 32% (12) | None | $825 |
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
| Cephalexin | 12 | $106 | $9 |
| Hydrocodone-Acetaminophen | 11 | $67 | $6 |
| Prednisone | 11 | $20 | $2 |
2022: 1 drug
| Cephalexin | 18 | $126 | $7 |
2021: 1 drug
| Cephalexin | 13 | $68 | $5 |
2020: 3 drugs
| Ondansetron | 21 | $171 | $8 |
| Cephalexin | 15 | $91 | $6 |
| Prednisone | 13 | $25 | $2 |
2019: 7 drugs
| Narcan | 11 | $1,422 | $129 |
| Lidocaine | 14 | $500 | $36 |
| Cephalexin | 30 | $233 | $8 |
| Ondansetron | 32 | $164 | $5 |
| Hydrocodone-Acetaminophen | 17 | $82 | $5 |
| Tramadol | 19 | $62 | $3 |
| Prednisone | 15 | $37 | $2 |
2018: 6 drugs
| Ventolin Hfa | 11 | $610 | $55 |
| Hydrocodone-Acetaminophen | 28 | $159 | $6 |
| Cephalexin | 21 | $138 | $7 |
| Ondansetron | 21 | $129 | $6 |
| Azithromycin | 12 | $68 | $6 |
| Tramadol | 15 | $50 | $3 |
2017: 6 drugs
| Ventolin Hfa | 11 | $588 | $53 |
| Cephalexin | 29 | $206 | $7 |
| Hydrocodone-Acetaminophen | 48 | $201 | $4 |
| Ondansetron | 26 | $145 | $6 |
| Levofloxacin | 13 | $83 | $6 |
| Prednisone | 13 | $42 | $3 |
2016: 7 drugs
| Hydrocodone-Acetaminophen | 47 | $273 | $6 |
| Levofloxacin | 19 | $156 | $8 |
| Cephalexin | 19 | $146 | $8 |
| Ciprofloxacin | 23 | $137 | $6 |
| Clindamycin | 12 | $136 | $11 |
| Ibuprofen | 18 | $79 | $4 |
| Acetaminophen-Codeine | 11 | $57 | $5 |
2015: 3 drugs
| Hydrocodone-Acetaminophen | 44 | $239 | $5 |
| Ciprofloxacin | 14 | $92 | $7 |
| Prednisone | 11 | $42 | $4 |
2014: 1 drug
| Hydrocodone-Acetaminophen | 11 | $48 | $4 |
Money from drug and device companies
$232 in 2019
A payment is not proof that care is biased.
| AcelRx Pharmaceuticals | Dsuvia | $126 | 1 payment
|
| Allergan | Dalvance | $106 | 1 payment
|
See all 2 published payments
| AcelRx Pharmaceuticals | Meals · 2019-11-13 | Dsuvia | $126 |
| Allergan | Meals · 2019-05-07 | Dalvance | $106 |
Checkups this office reported
Medicare did not publish checkup rates for this clinician.
- Medicare’s overall office score
- 98.6 / 100
- Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.
Professional record
- NPI
- 1447511308
- Licence
- CA A128047California A128047: Current · expires 2027-12-31
- Gender
- Female
More record details
- Sole proprietor
- No
- Taxonomy
- Federal specialty code 207P00000X (207P00000X)
- Mailing address
- 2450 Ashby Ave, Berkeley, CA, 94705
- NPI first listed
- 2012-06-06
- NPI last updated
- 2018-02-12
This is when the NPI record was last certified, not a medical board exam.