Siavash Assar, OD
Optometry · Berkeley
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 3
- 1 carrier
- Offices
- 4
- Since medical school
- 9 years
- Graduated 2017
Offices
4 locations · UCSF Medical Group Business Services · University of California San Francisco
Hospitals listed: UCSF Medical Center. 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 Dr. Assar’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 |
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.
- UCSF Medical CenterSan Francisco, CAAcute Care Hospital · Voluntary non-profit - Other · Has an emergency department · Birthing-friendlyPart of University of California Health, which runs 12 hospitalsHome of UCSF Helen Diller Family Comprehensive Cancer Center, a National Cancer Institute designated comprehensive cancer centrePatients rate it 4 of 5 · 81% would definitely recommend itOverall rating: 4 of 5 starsWorse than the national rate — Perioperative pulmonary embolism or deep vein thrombosis rate: 4.9 (3.79 to 6.02) · 7,590 cases, Jul 2022 – Jun 2024Worse than the national rate — Rate of inpatient admissions for patients receiving outpatient chemotherapy: 12.8 (11.3 to 14.4) · 2,019 cases, Jan 2024 – Dec 2024Better than the national rate — Death rate among surgical inpatients with serious treatable complications: 139.4 (110.22 to 168.58) · 452 cases, Jul 2022 – Jun 2024Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.622, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.626, Oct 2024 – Sep 2025Better than the national rate — MRSA Bacteremia: 0.491, Oct 2024 – Sep 2025Better than the national rate — Ratio of unplanned hospital visits after hospital outpatient surgery: 0.8 (0.7 to 1) · 2,336 cases, Jan 2024 – Dec 2024
See every measure and the patient survey for UCSF Medical Center
Behind the star rating — Deaths: 5 better, 3 the same, 0 worse of 8 measures. Safety: 3 better, 5 the same, 0 worse of 8 measures. Readmissions: 3 better, 5 the same, 3 worse of 11 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 4.9 (3.79 to 6.02) · 7,590 cases | Worse | Jul 2022 – Jun 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 12.8 (11.3 to 14.4) · 2,019 cases | Worse | Jan 2024 – Dec 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 139.4 (110.22 to 168.58) · 452 cases | Better | Jul 2022 – Jun 2024 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.622 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.626 | Better | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0.491 | Better | Oct 2024 – Sep 2025 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 0.8 (0.7 to 1) · 2,336 cases | Better | Jan 2024 – Dec 2024 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 1.24 (0.58 to 1.9) · 4,689 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 1.05 (0.89 to 1.2) | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 1.9 · 89 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 7.5 · 85 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 10.1 · 132 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 6.6 · 454 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 10.3 · 618 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 9.6 · 380 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 2.7 · 5,000 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.22 (0.06 to 0.38) · 15,965 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.2 (0.05 to 0.35) · 17,859 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 0.85 (0 to 1.83) · 4,184 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2 (1.1 to 2.9) · 6,516 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 7.35 (4.49 to 10.21) · 3,989 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 5 (3.22 to 6.77) · 4,087 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.95 (0.74 to 3.15) · 2,034 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.95 (0.63 to 1.28) · 15,431 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 4 · 399 cases | None | Apr 2023 – Mar 2025 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.899 | No different | Oct 2024 – Sep 2025 |
| SSI - Abdominal HysterectomyInfections | 0.689 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 1.224 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 16 · 156 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 20 · 564 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | 60.3 · 160 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -9.7 · 550 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 44.1 · 660 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 16.8 · 667 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 5.7 (4.8 to 6.7) · 2,019 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 6 · 421 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 10.5 · 53 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 20 · 107 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 13.9 (11.3 to 17.1) · 3,247 cases | No different | Jan 2022 – Dec 2024 |
What patients said (3,181 patients answered, 25% of those asked)
| Cleanliness | 4 |
| Nurse communication | 4 |
| Doctor communication | 4 |
| Communication about medicines | 3 |
| Discharge information | 4 |
| Overall hospital rating | 4 |
| Quietness | 2 |
| Recommend hospital | 5 |
| Room was "always" clean | 71% |
| Nurses "always" communicated well | 80% |
| Doctors "always" communicated well | 80% |
| Staff "always" explained | 61% |
| Yes, staff "did" give patients this information | 88% |
| Yes, staff "did" give patients information about help after discharge | 87% |
| Doctors "always" explained things so they could understand | 74% |
| Doctors "always" listened carefully | 78% |
| Doctors "always" treated them with courtesy and respect | 86% |
| Patients who gave a rating of "9" or "10" (high) | 76% |
| Staff "always" explained new medications | 75% |
| Nurses "always" explained things so they could understand | 77% |
| Nurses "always" listened carefully | 78% |
| Nurses "always" treated them with courtesy and respect | 86% |
| "Always" quiet at night | 50% |
| "YES", patients would definitely recommend the hospital | 81% |
| Staff "always" explained possible side effects | 46% |
| Yes, staff "did" give patients information about possible symptoms | 90% |
Original Medicare doctor bills
$31,314
Medicare paid this office $31,314 for 318 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Short return visit (20+ min) | 79 | $4,910 | $58 |
| New patient visit (45+ min) | 37 | $4,189 | $113 |
| Return visit (30+ min) | 44 | $4,107 | $87 |
| Return visit (30+ min) | 45 | $3,450 | $77 |
| New patient visit (30+ min) | 41 | $2,916 | $71 |
See all 16 services
| Short return visit (20+ min) | 79 | $4,910 | $58 |
| New patient visit (45+ min) | 37 | $4,189 | $113 |
| Return visit (30+ min) | 44 | $4,107 | $87 |
| Return visit (30+ min) | 45 | $3,450 | $77 |
| New patient visit (30+ min) | 41 | $2,916 | $71 |
| Short return visit (20+ min) | 28 | $2,433 | $59 |
| New patient visit (45+ min) | 12 | $1,412 | $118 |
| New patient visit (30+ min) | 14 | $1,222 | $87 |
| Imaging of retina | 45 | $1,082 | $23 |
| Exam of visual field with extended testing | 19 | $496 | $25 |
| Imaging of retina | 16 | $416 | $26 |
| Imaging of optic nerve | 22 | $414 | $19 |
| Imaging of optic nerve | 15 | $412 | $27 |
| Photography of the retina | 14 | $408 | $29 |
| Exam of the internal drainage system of eye | 12 | $226 | $19 |
| Ultrasound scan of cornea to determine thickness | 13 | $99 | $7 |
Who their Medicare patients are
318 Original Medicare patients in 2024. Average age 74 · Under 65 8% · 85 and older 11% · Women 61% · Also on Medicaid 30% · Health risk score 1.26. Above the middle of the specialty; the typical optometry clinician is at 0.97.
Conditions among them: High blood pressure 64% · Diabetes 30% · Coronary heart disease 22% · Chronic kidney disease 19% · Depression 19% · Atrial fibrillation 16% · Cancer 15% · Heart failure 13% · COPD 10% · Dementia 7% · Stroke 7%.
The office billed $207,312, Medicare allowed $45,972 and paid $31,314; for 555 services of 25 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 | 318 | 555 | 74 | 1.26 | $207,312 | $31,314 |
| 2023 | 309 | 612 | 75 | 0.87 | $198,675 | $47,604 |
| 2022 | 197 | 384 | 75 | 0.79 | $122,841 | $28,791 |
| 2021 | 222 | 425 | 75 | 0.84 | $136,358 | $34,878 |
| 2020 | 115 | 211 | 73 | 0.79 | $64,694 | $16,920 |
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: 9 services
| Return visit (30+ min) | 118 | $12,744 | $100 |
| New patient visit (45+ min) | 93 | $11,588 | $125 |
| Short return visit (20+ min) | 94 | $11,454 | $81 |
| New patient visit (30+ min) | 41 | $3,779 | $92 |
| Photography of the retina | 50 | $1,715 | $34 |
| Imaging of optic nerve | 49 | $1,653 | $33 |
| Imaging of retina | 35 | $1,352 | $39 |
| Exam of visual field with extended testing | 17 | $1,118 | $62 |
| Exam of the internal drainage system of eye | 15 | $291 | $19 |
2022: 7 services
| New patient visit (45+ min) | 58 | $7,861 | $136 |
| Return visit (30+ min) | 71 | $7,419 | $99 |
| Short return visit (20+ min) | 55 | $5,401 | $72 |
| New patient visit (30+ min) | 28 | $2,679 | $96 |
| Photography of the retina | 37 | $1,420 | $35 |
| Imaging of retina | 25 | $926 | $36 |
| Imaging of optic nerve | 19 | $660 | $35 |
2021: 9 services
| New patient complete exam of visual system | 69 | $8,741 | $127 |
| Short return visit (20+ min) | 66 | $6,885 | $77 |
| Established patient complete exam of visual system | 45 | $5,053 | $112 |
| Return visit (30+ min) | 33 | $3,833 | $106 |
| New patient visit (30+ min) | 35 | $3,199 | $91 |
| New patient visit (45+ min) | 15 | $1,877 | $125 |
| Photography of the retina | 42 | $1,621 | $38 |
| Imaging of retina | 32 | $1,249 | $39 |
| Imaging of optic nerve | 22 | $803 | $36 |
2020: 7 services
| New patient complete exam of visual system | 46 | $6,085 | $132 |
| Short return visit (20+ min) | 24 | $2,242 | $68 |
| Return visit (30+ min) | 12 | $1,560 | $104 |
| New patient visit (30+ min) | 17 | $1,555 | $91 |
| Established patient complete exam of visual system | 16 | $1,319 | $82 |
| Imaging of retina | 16 | $619 | $34 |
| Imaging of optic nerve | 16 | $555 | $35 |
Medicaid work
$154 in 2023
Medicaid paid $154 for 12 billed services this clinician did in 2023, up to 12 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.
| DETERMINATION REFRACTIVE STATE | 12 | $154 |
| 2023 | 12 | 1 | 12 | $154 |
| 2022 | 13 | 1 | 13 | $168 |
| 2019 | 224 | 2 | 37 | $36,321 |
See the largest Medicaid services in earlier years
2022
| DETERMINATION REFRACTIVE STATE | 13 | $168 |
2019
| Clinic visit/encounter, all-inclusive | 124 | $33,133 |
| FUNDUS PHOTOGRAPHY W/INTERPRETATION & REPORT | 100 | $3,187 |
Drugs they prescribed that Part D paid
$15,476
Pharmacies billed $15,476 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 58) in 2024. At or below the middle of the specialty; the typical optometry clinician is at 0%.
25 generic and 33 brand-name prescriptions · $15,476 in drug cost.
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.
| Prednisolone Acetate | 12 | $633 | $53 |
Year by year
| 2024 | 58 | 31 | 0% (0) | 57% | $15,476 |
| 2023 | 75 | 44 | 0% (0) | 56% | $22,307 |
| 2022 | 62 | 31 | 0% (0) | 63% | $8,337 |
| 2021 | 59 | 27 | 0% (0) | 73% | $9,533 |
| 2020 | 53 | 22 | 0% (0) | 49% | $4,509 |
| 2019 | 35 | 13 | 0% (0) | 66% | $1,781 |
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
| Neomycin-Polymyxin-Dexameth | 12 | $203 | $17 |
| Erythromycin | 15 | $155 | $10 |
2022: 1 drug
| Latanoprost | 23 | $407 | $18 |
2021: 1 drug
| Latanoprost | 25 | $331 | $13 |
2020: 1 drug
| Latanoprost | 21 | $801 | $38 |
2019: 1 drug
| Latanoprost | 19 | $292 | $15 |
Money from drug and device companies
$68 in 2023
| 2023 | 1 | 1 | None | $68 |
| 2019 | 3 | 12 | $300 | $331 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Dompe US | Oxervate | $68 | 1 payment
|
See the published payment
| Dompe US | Meals · 2023-06-08 | Oxervate | $68 |
See earlier years (2019)
2019: $331
| Johnson & Johnson Vision Care | Acuvue | $110 | 4 payments
|
| Alcon Vision | Dailies | $110 | 4 payments
|
| CooperVision | Clariti Contact Lens | $110 | 4 payments
|
Professional record
- NPI
- 1699298224
- Licence
- PA OEG003324
- Group
- UCSF Medical Group Business Services · University of California San Francisco
- Gender
- Male
More record details
- Sole proprietor
- Yes
- Taxonomy
- Federal specialty code 152W00000X (152W00000X)
- Mailing address
- 325 Distel Cir, Los Altos, CA, 94022
- NPI first listed
- 2017-07-25
- NPI last updated
- 2019-12-16
- NPI record certified
- 2019-12-16
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 820 S Damen Ave, Chicago, IL, 60612