Allen Chang, MD
Emergency Medicine · Roseville
- 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 - Sacramento. 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. Chang’s office at (916) 784-4000 to ask if they take your plan before you enroll.
California Medical Board record
Licence C143700 · Current
Licensed to practise in California · since 2016 · expires 2027-12-31 · Albert Einstein College of Medicine of Yeshiva University.
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.
- Kaiser Foundation Hospital - SacramentoSacramento, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Kaiser Permanente, which runs 41 hospitals in 3 statesPatients rate it 3 of 5 · 62% would definitely recommend itOverall rating: 4 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.499, Oct 2024 – Sep 2025Better than the national rate — SSI - Colon Surgery: 0, Oct 2024 – Sep 2025
See every measure and the patient survey for Kaiser Foundation Hospital - Sacramento
Behind the star rating — Deaths: 0 better, 4 the same, 0 worse of 4 measures. Safety: 1 better, 6 the same, 0 worse of 7 measures. Readmissions: 0 better, 3 the same, 0 worse of 3 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 | 0.499 | Better | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 0 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 0.98 (0 to 2.04) · 261 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 0.97 (0.55 to 1.4) | No different | Jul 2022 – Jun 2024 |
| Death rate for heart failure patientsComplications and deaths | 11.1 · 36 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 16.1 · 52 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 11.9 · 544 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 4 · 3,990 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.19 (0 to 0.42) · 1,558 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.26 (0.04 to 0.47) · 1,575 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 3.49 (1.03 to 5.96) · 253 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.65 (0 to 3.37) · 87 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.13 (0.47 to 3.79) · 261 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 12.91 (3.52 to 22.29) · 88 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 4.91 (0.7 to 9.11) · 82 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.71 (0.2 to 3.22) · 68 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.32 (0 to 1.28) · 1,241 cases | No different | Jul 2022 – Jun 2024 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.716 | No different | Oct 2024 – Sep 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.803 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 1.592 | No different | Oct 2024 – Sep 2025 |
| SSI - Abdominal HysterectomyInfections | 0.901 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 14.8 · 130 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 22.6 · 657 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -46.4 · 40 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | -37.4 · 53 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 19 · 622 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 22.7 · 261 cases | None | Jul 2023 – Jun 2025 |
What patients said (2,237 patients answered, 23% of those asked)
| Cleanliness | 2 |
| Nurse communication | 3 |
| Doctor communication | 3 |
| Communication about medicines | 2 |
| Discharge information | 3 |
| Overall hospital rating | 2 |
| Quietness | 1 |
| Recommend hospital | 3 |
| Room was "always" clean | 63% |
| Nurses "always" communicated well | 74% |
| Doctors "always" communicated well | 78% |
| Staff "always" explained | 58% |
| Yes, staff "did" give patients this information | 86% |
| Yes, staff "did" give patients information about help after discharge | 86% |
| Doctors "always" explained things so they could understand | 72% |
| Doctors "always" listened carefully | 77% |
| Doctors "always" treated them with courtesy and respect | 84% |
| Patients who gave a rating of "9" or "10" (high) | 59% |
| Staff "always" explained new medications | 71% |
| Nurses "always" explained things so they could understand | 70% |
| Nurses "always" listened carefully | 71% |
| Nurses "always" treated them with courtesy and respect | 82% |
| "Always" quiet at night | 32% |
| "YES", patients would definitely recommend the hospital | 62% |
| Staff "always" explained possible side effects | 45% |
| Yes, staff "did" give patients information about possible symptoms | 85% |
Original Medicare doctor bills
$3,531
Medicare paid this office $3,531 for 30 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 | 30 | $3,256 | $109 |
Who their Medicare patients are
30 Original Medicare patients in 2024. Average age 69 · Women 60% · Health risk score 2.42. Above the middle of the specialty; the typical emergency medicine clinician is at 2.01.
Conditions among them: High blood pressure 75% · Diabetes 47% · Depression 47% · Chronic kidney disease 40%.
The office billed $28,713, Medicare allowed $5,469 and paid $3,531; for 33 services of 4 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 | 33 | 69 | 2.42 | $28,713 | $3,531 |
| 2023 | 24 | 24 | 61 | 1.18 | $18,620 | $2,549 |
| 2022 | 264 | 441 | 73 | 2.20 | $249,144 | $38,956 |
| 2021 | 44 | 64 | 73 | 2.08 | $27,613 | $6,221 |
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 high level of medical decision making | 20 | $2,259 | $113 |
2022: 5 services
| Emergency department visit with high level of medical decision making | 132 | $19,589 | $145 |
| Critical care, first 30-74 minutes | 64 | $11,090 | $173 |
| Emergency department visit with moderate level of medical decision making | 46 | $3,780 | $80 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 131 | $834 | $6 |
| Emergency department visit with low level of medical decision making | 20 | $826 | $39 |
2021: 4 services
| Emergency department visit with high level of medical decision making | 17 | $2,450 | $144 |
| Critical care, first 30-74 minutes | 12 | $2,137 | $178 |
| Emergency department visit with moderate level of medical decision making | 14 | $1,387 | $99 |
| Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 19 | $130 | $7 |
Medicaid work
$89,226 in 2024
Medicaid paid $89,226 for 536 billed services this clinician did in 2024, up to 65 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 | 536 | $89,226 |
| 2024 | 536 | 1 | 65 | $89,226 |
| 2023 | 315 | 2 | 52 | $36,276 |
| 2022 | 1,242 | 11 | 56 | $61,727 |
| 2021 | 398 | 9 | 52 | $109,264 |
See the largest Medicaid services in earlier years
2023
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 253 | $32,759 |
| EMERGENCY DEPT VISIT MOD MDM | 62 | $3,516 |
2022
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 304 | $23,544 |
| EMERGENCY DEPT VISIT MOD MDM | 351 | $20,167 |
| EMERGENCY DEPT VISIT LOW MDM | 283 | $11,354 |
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 144 | $1,573 |
| Service | 42 | $1,572 |
| Critical care, evaluation and management of the critically ill or critically injured patient; first 30-74 minutes | 12 | $1,364 |
| EMERGENCY DEPARTMENT VISIT STRAIGHTFORWARD MDM | 52 | $1,122 |
| Service | 12 | $613 |
| Return visit (30+ min) | 12 | $233 |
| COMPREHENSIVE METABOLIC PANEL | 15 | $106 |
| Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count | 15 | $78 |
2021
| Service | 102 | $96,388 |
| EMERGENCY DEPT VISIT MOD MDM | 89 | $5,654 |
| EMERGENCY DEPT VISIT LOW MDM | 60 | $2,463 |
| EMERGENCY DEPARTMENT VISIT HIGH MDM | 26 | $2,345 |
| Service | 29 | $1,082 |
| EMERGENCY DEPARTMENT VISIT STRAIGHTFORWARD MDM | 40 | $945 |
| Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only | 26 | $282 |
| COMPREHENSIVE METABOLIC PANEL | 12 | $60 |
| Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count | 14 | $44 |
Drugs they prescribed that Part D paid
$3,947
Pharmacies billed $3,947 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 8% of their Part D prescriptions (16 of 192) in 2024. At or below the middle of the specialty; the typical emergency medicine clinician is at 12%.
162 generic and 30 brand-name prescriptions · $3,947 in drug cost · 58 antibiotic prescriptions to 52 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 | 22 | $492 | $22 |
| Ofloxacin | 12 | $169 | $14 |
| Prednisone | 19 | $130 | $7 |
| Cephalexin | 15 | $118 | $8 |
| Hydrocodone-Acetaminophen | 12 | $91 | $8 |
Year by year
| 2024 | 192 | 127 | 8% (16) | 16% | $3,947 |
| 2023 | 96 | 70 | 17% (16) | None | $1,457 |
| 2022 | 71 | 57 | None | None | $839 |
| 2021 | 29 | 23 | 0% (0) | 0% | $170 |
| 2020 | 12 | None | None | None | $383 |
| 2018 | 14 | 14 | None | None | $327 |
| 2016 | 12 | None | 0% (0) | 0% | $325 |
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
| Hydrocodone-Acetaminophen | 14 | $98 | $7 |
| Cephalexin | 11 | $97 | $9 |
Money from drug and device companies
$18 in 2024
| 2024 | 1 | 1 | None | $18 |
| 2023 | 2 | 3 | None | $270 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Agile Therapeutics | Twirla | $18 | 1 payment
|
See the published payment
| Agile Therapeutics | Meals · 2024-04-11 | Twirla | $18 |
See earlier years (2023)
2023: $270
| Abbott Laboratories | Infinity | $162 | 2 payments
|
| Baxter Healthcare | None | $108 | 1 payment
|
Professional record
- NPI
- 1588976567
- Licence
- CA C143700California C143700: Current · expires 2027-12-31
- Trained
- Albert Einstein College of Medicine of Yeshiva University, 2010
- Gender
- Male
More record details
- Sole proprietor
- Yes
- Taxonomy
- Federal specialty code 207P00000X (207P00000X); Federal specialty code 207PE0004X (207PE0004X)
- Mailing address
- 3160 Wrangler Rd, San Ramon, CA, 94582
- NPI first listed
- 2010-07-08
- NPI last updated
- 2022-10-01
- NPI record certified
- 2022-10-01
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 751 S Bascom Ave, San Jose, CA, 95128
This office lists an electronic records connection.