Maxim L Ritzenberg, MD
Emergency Medicine · Daly City
- 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
- 12
Offices
12 locations · UCSF Health Medical Foundation · County of Santa Clara
Looking this up.
Hospitals listed: Zuckerberg San Francisco General Hosp & Trauma Ctr. 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. Ritzenberg’s office to ask if they take your plan before you enroll.
California Medical Board record
Licence A128625 · Current
Licensed to practise in California · since 2014 · expires 2027-05-31 · Columbia University College of Physicians and Surgeons.
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.
- Zuckerberg San Francisco General Hosp & Trauma CtrSan Francisco, CAAcute Care Hospital · Government - Local · Has an emergency department · Birthing-friendlyPart of San Francisco Health Network, which runs 2 hospitalsPatients rate it 3 of 5 · 72% would definitely recommend itOverall rating: 2 of 5 starsBetter than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.449, Oct 2024 – Sep 2025Better than the national rate — Central Line Associated Bloodstream Infection (ICU + select Wards): 0.37, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.538, Oct 2024 – Sep 2025
See every measure and the patient survey for Zuckerberg San Francisco General Hosp & Trauma Ctr
Behind the star rating — Deaths: 1 better, 6 the same, 0 worse of 7 measures. Safety: 1 better, 5 the same, 1 worse of 7 measures. Readmissions: 0 better, 7 the same, 2 worse of 9 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 | 0.449 | Better | Oct 2024 – Sep 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.37 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.538 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 0.9 (0 to 1.91) · 667 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 1.12 (0.76 to 1.49) | No different | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 195.34 (147.34 to 243.34) · 76 cases | No different | Jul 2022 – Jun 2024 |
| Death rate for COPD patientsComplications and deaths | 7.2 · 114 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 12.2 · 48 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 7.5 · 201 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 14.5 · 214 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 10.3 · 261 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 3.5 · 1,351 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.29 (0.07 to 0.5) · 4,709 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.39 (0.19 to 0.59) · 4,644 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 4.34 (2.11 to 6.56) · 795 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.59 (0 to 3.28) · 234 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.85 (1.33 to 4.38) · 861 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 8.95 (0.25 to 17.64) · 261 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 6 (2.01 to 9.98) · 242 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.66 (0.17 to 3.14) · 167 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.79 (0.08 to 1.49) · 4,129 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 4.4 · 35 cases | None | Apr 2023 – Mar 2025 |
| MRSA BacteremiaInfections | 0.709 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 1.769 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 14.7 · 41 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 22.1 · 227 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | 28.6 · 257 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 75.1 · 239 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 18.2 · 232 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 6.8 (4.7 to 9.6) · 175 cases | No different | Jan 2024 – Dec 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 11.3 (8.3 to 15.1) · 175 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 6.1 · 37 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 20.2 · 132 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 13.6 (10.4 to 17.9) · 966 cases | No different | Jan 2022 – Dec 2024 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 1.2 (0.8 to 1.7) · 88 cases | No different | Jan 2024 – Dec 2024 |
What patients said (1,644 patients answered, 16% of those asked)
| Cleanliness | 4 |
| Nurse communication | 2 |
| Doctor communication | 3 |
| Communication about medicines | 2 |
| Discharge information | 3 |
| Overall hospital rating | 4 |
| Quietness | 3 |
| Recommend hospital | 4 |
| Room was "always" clean | 69% |
| Nurses "always" communicated well | 73% |
| Doctors "always" communicated well | 75% |
| Staff "always" explained | 56% |
| Yes, staff "did" give patients this information | 84% |
| Yes, staff "did" give patients information about help after discharge | 83% |
| Doctors "always" explained things so they could understand | 68% |
| Doctors "always" listened carefully | 75% |
| Doctors "always" treated them with courtesy and respect | 82% |
| Patients who gave a rating of "9" or "10" (high) | 72% |
| Staff "always" explained new medications | 67% |
| Nurses "always" explained things so they could understand | 68% |
| Nurses "always" listened carefully | 70% |
| Nurses "always" treated them with courtesy and respect | 80% |
| "Always" quiet at night | 55% |
| "YES", patients would definitely recommend the hospital | 72% |
| Staff "always" explained possible side effects | 44% |
| Yes, staff "did" give patients information about possible symptoms | 84% |
Original Medicare doctor bills
$10,783
Medicare paid this office $10,783 for 80 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Emergency department visit with high level of medical decision making | 50 | $7,455 | $143 |
| Emergency department visit with moderate level of medical decision making | 21 | $1,763 | $84 |
Who their Medicare patients are
80 Original Medicare patients in 2024. Average age 73 · Under 65 14% · 85 and older 16% · Women 46% · Health risk score 2.30. Above the middle of the specialty; the typical emergency medicine clinician is at 2.01.
Conditions among them: High blood pressure 74% · Diabetes 39% · Heart failure 38% · Chronic kidney disease 38% · Coronary heart disease 31% · COPD 30% · Depression 30% · Atrial fibrillation 21% · Dementia 19% · Stroke 18%.
The office billed $63,901, Medicare allowed $14,325 and paid $10,783; for 85 services of 9 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 | 80 | 85 | 73 | 2.30 | $63,901 | $10,783 |
| 2023 | 62 | 66 | 68 | 1.99 | $49,309 | $9,036 |
| 2022 | 38 | 39 | 66 | 2.98 | $27,663 | $4,038 |
| 2021 | 72 | 82 | 67 | 2.19 | $54,513 | $9,771 |
| 2020 | 75 | 93 | 67 | 2.41 | $58,196 | $10,810 |
| 2019 | 143 | 161 | 68 | 2.39 | $101,207 | $19,036 |
| 2018 | 84 | 87 | 65 | 1.99 | $57,771 | $10,410 |
| 2017 | 73 | 83 | 65 | 1.90 | $54,505 | $9,875 |
| 2016 | 24 | 26 | 67 | 2.08 | $16,747 | $3,009 |
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
| Emergency department visit with high level of medical decision making | 39 | $5,865 | $150 |
| Emergency department visit with moderate level of medical decision making | 11 | $1,169 | $106 |
2022: 2 services
| Emergency department visit with high level of medical decision making | 21 | $2,811 | $134 |
| Emergency department visit with moderate level of medical decision making | 15 | $967 | $64 |
2021: 2 services
| Emergency department visit with high level of medical decision making | 36 | $5,535 | $154 |
| Emergency department visit with moderate level of medical decision making | 26 | $2,394 | $89 |
2020: 3 services
| Emergency department visit with high level of medical decision making | 35 | $4,974 | $142 |
| Critical care, first 30-74 minutes | 12 | $2,408 | $201 |
| Emergency department visit with moderate level of medical decision making | 19 | $2,134 | $102 |
2019: 4 services
| Emergency department visit with high level of medical decision making | 69 | $10,606 | $147 |
| Emergency department visit with moderate level of medical decision making | 47 | $4,730 | $99 |
| Critical care, first 30-74 minutes | 11 | $2,127 | $193 |
| Emergency department visit with low level of medical decision making | 18 | $954 | $53 |
2018: 2 services
| Emergency department visit with high level of medical decision making | 48 | $6,778 | $141 |
| Emergency department visit with moderate level of medical decision making | 26 | $2,503 | $96 |
2017: 2 services
| Emergency department visit with high level of medical decision making | 41 | $5,830 | $142 |
| Emergency department visit with moderate level of medical decision making | 26 | $2,512 | $97 |
2016: 1 service
| Emergency department visit with high level of medical decision making | 13 | $2,041 | $146 |
Medicaid work
$10,229 in 2024
Medicaid paid $10,229 for 176 billed services this clinician did in 2024, up to 27 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 DEPARTMENT VISIT HIGH MDM | 67 | $6,319 |
| Service | 28 | $2,281 |
| Service | 32 | $728 |
| EMERGENCY DEPT VISIT MOD MDM | 15 | $359 |
| Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count | 18 | $280 |
| Basic metabolic panel (Calcium, total) This panel must include the following: Calcium, total (82310) Carbon dioxide (bicarbonate) (82374) Chloride (82435) Creatinine (82565) Glucose (82947) Potassium (84132) Sodium (84295) Urea nitrogen (BUN) (84520) | 16 | $263 |
| 2024 | 176 | 6 | 27 | $10,229 |
| 2023 | 56 | 2 | 18 | $5,119 |
| 2022 | 13 | 1 | 12 | $693 |
| 2021 | 643 | 10 | 22 | $9,176 |
| 2020 | 230 | 8 | 22 | $3,388 |
| 2019 | 163 | 6 | 20 | $5,764 |
| 2018 | 57 | 3 | 16 | $2,681 |
See the largest Medicaid services in earlier years
2023
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 43 | $4,400 |
| EMERGENCY DEPT VISIT MOD MDM | 13 | $719 |
2022
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 13 | $693 |
2021
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 75 | $4,403 |
| EMERGENCY DEPT VISIT MOD MDM | 45 | $1,764 |
| EMERGENCY DEPARTMENT VISIT MAY NOT REQ PHYS/QHP | 104 | $726 |
| Miscellaneous therapeutic items and supplies, retail purchases, not otherwise classified; identify product in "remarks" | 110 | $668 |
| Therapeutic, prophylactic, or diagnostic injection (specify substance or drug); intravenous push, single or initial substance/drug | 13 | $417 |
| Basic metabolic panel (Calcium, total) This panel must include the following: Calcium, total (82310) Carbon dioxide (bicarbonate) (82374) Chloride (82435) Creatinine (82565) Glucose (82947) Potassium (84132) Sodium (84295) Urea nitrogen (BUN) (84520) | 110 | $408 |
| Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count | 118 | $374 |
| Electrocardiogram, routine ECG with at least 12 leads; tracing only, without interpretation and report | 41 | $372 |
| Radiologic examination, chest; single view | 13 | $39 |
| HEPATIC FUNCTION PANEL | 14 | $3 |
2020
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 50 | $2,864 |
| EMERGENCY DEPT VISIT MOD MDM | 25 | $247 |
| EMERGENCY DEPARTMENT VISIT MAY NOT REQ PHYS/QHP | 67 | $97 |
| Electrocardiogram, routine ECG with at least 12 leads; tracing only, without interpretation and report | 16 | $82 |
| Basic metabolic panel (Calcium, total) This panel must include the following: Calcium, total (82310) Carbon dioxide (bicarbonate) (82374) Chloride (82435) Creatinine (82565) Glucose (82947) Potassium (84132) Sodium (84295) Urea nitrogen (BUN) (84520) | 19 | $36 |
| Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count | 21 | $33 |
| Radiologic examination, chest; single view | 12 | $29 |
| Miscellaneous therapeutic items and supplies, retail purchases, not otherwise classified; identify product in "remarks" | 20 | $0 |
2019
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 64 | $3,267 |
| EMERGENCY DEPT VISIT MOD MDM | 41 | $1,650 |
| Service | 16 | $639 |
| EMERGENCY DEPARTMENT VISIT MAY NOT REQ PHYS/QHP | 14 | $98 |
| Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count | 15 | $58 |
| Basic metabolic panel (Calcium, total) This panel must include the following: Calcium, total (82310) Carbon dioxide (bicarbonate) (82374) Chloride (82435) Creatinine (82565) Glucose (82947) Potassium (84132) Sodium (84295) Urea nitrogen (BUN) (84520) | 13 | $53 |
2018
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 28 | $1,663 |
| Service | 16 | $608 |
| EMERGENCY DEPT VISIT MOD MDM | 13 | $411 |
Checkups this office reported
Medicare did not publish checkup rates for this clinician.
- Medicare’s overall office score
- 91.9 / 100
- Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.
Professional record
- NPI
- 1669748158
- Licence
- CA 128625California A128625: Current · expires 2027-05-31
- Trained
- Columbia University College of Physicians and Surgeons, 2012
- Group
- UCSF Health Medical Foundation · County of Santa Clara
- Gender
- Male
More record details
- Sole proprietor
- No
- Taxonomy
- Federal specialty code 207P00000X (207P00000X)
- Mailing address
- 505 Parnassus Ave, Room M24, San Francisco, CA, 94143
- NPI first listed
- 2012-03-28
- NPI last updated
- 2015-08-07
This is when the NPI record was last certified, not a medical board exam.