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Allen Chang, MD

Emergency Medicine · Roseville

NPI 1588976567

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

Looking this up.

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 it
    Overall 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.

Every scored measure at Kaiser Foundation Hospital - Sacramento
Clostridium Difficile (C.Diff)Infections0.499BetterOct 2024 – Sep 2025
SSI - Colon SurgeryInfections0BetterOct 2024 – Sep 2025
Abdominopelvic accidental puncture or laceration rateComplications and deaths0.98 (0 to 2.04) · 261 casesNo differentJul 2022 – Jun 2024
CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths0.97 (0.55 to 1.4)No differentJul 2022 – Jun 2024
Death rate for heart failure patientsComplications and deaths11.1 · 36 casesNoneJul 2022 – Jun 2025
Death rate for pneumonia patientsComplications and deaths16.1 · 52 casesNoneJul 2022 – Jun 2025
Death rate for stroke patientsComplications and deaths11.9 · 544 casesNoneJul 2023 – Jun 2025
Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths4 · 3,990 casesNoneJul 2024 – Jun 2025
Iatrogenic pneumothorax rateComplications and deaths0.19 (0 to 0.42) · 1,558 casesNo differentJul 2022 – Jun 2024
In-hospital fall-associated fracture rateComplications and deaths0.26 (0.04 to 0.47) · 1,575 casesNo differentJul 2022 – Jun 2024
Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths3.49 (1.03 to 5.96) · 253 casesNo differentJul 2022 – Jun 2024
Postoperative acute kidney injury requiring dialysis rateComplications and deaths1.65 (0 to 3.37) · 87 casesNo differentJul 2022 – Jun 2024
Postoperative hemorrhage or hematoma rateComplications and deaths2.13 (0.47 to 3.79) · 261 casesNo differentJul 2022 – Jun 2024
Postoperative respiratory failure rateComplications and deaths12.91 (3.52 to 22.29) · 88 casesNo differentJul 2022 – Jun 2024
Postoperative sepsis rateComplications and deaths4.91 (0.7 to 9.11) · 82 casesNo differentJul 2022 – Jun 2024
Postoperative wound dehiscence rateComplications and deaths1.71 (0.2 to 3.22) · 68 casesNo differentJul 2022 – Jun 2024
Pressure ulcer rateComplications and deaths0.32 (0 to 1.28) · 1,241 casesNo differentJul 2022 – Jun 2024
Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections0.716No differentOct 2024 – Sep 2025
Central Line Associated Bloodstream Infection (ICU + select Wards)Infections0.803No differentOct 2024 – Sep 2025
MRSA BacteremiaInfections1.592No differentOct 2024 – Sep 2025
SSI - Abdominal HysterectomyInfections0.901No differentOct 2024 – Sep 2025
Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits14.8 · 130 casesNoneJul 2023 – Jun 2025
Heart failure (HF) 30-Day Readmission RateUnplanned return visits22.6 · 657 casesNoneJul 2023 – Jun 2025
Hospital return days for heart failure patientsUnplanned return visits-46.4 · 40 casesNoneJul 2022 – Jun 2025
Hospital return days for pneumonia patientsUnplanned return visits-37.4 · 53 casesNoneJul 2022 – Jun 2025
Pneumonia (PN) 30-Day Readmission RateUnplanned return visits19 · 622 casesNoneJul 2023 – Jun 2025
Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits22.7 · 261 casesNoneJul 2023 – Jun 2025

What patients said (2,237 patients answered, 23% of those asked)

Patient survey stars by topic at Kaiser Foundation Hospital - Sacramento
Cleanliness2
Nurse communication3
Doctor communication3
Communication about medicines2
Discharge information3
Overall hospital rating2
Quietness1
Recommend hospital3
Share of patients giving the best answer at Kaiser Foundation Hospital - Sacramento
Room was "always" clean63%
Nurses "always" communicated well74%
Doctors "always" communicated well78%
Staff "always" explained58%
Yes, staff "did" give patients this information86%
Yes, staff "did" give patients information about help after discharge86%
Doctors "always" explained things so they could understand72%
Doctors "always" listened carefully77%
Doctors "always" treated them with courtesy and respect84%
Patients who gave a rating of "9" or "10" (high)59%
Staff "always" explained new medications71%
Nurses "always" explained things so they could understand70%
Nurses "always" listened carefully71%
Nurses "always" treated them with courtesy and respect82%
"Always" quiet at night32%
"YES", patients would definitely recommend the hospital62%
Staff "always" explained possible side effects45%
Yes, staff "did" give patients information about possible symptoms85%

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.

Largest Original Medicare bills
Emergency department visit with high level of medical decision making30$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

Original Medicare by year
20243033692.42$28,713$3,531
20232424611.18$18,620$2,549
2022264441732.20$249,144$38,956
20214464732.08$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

Original Medicare services billed in 2023
Emergency department visit with high level of medical decision making20$2,259$113

2022: 5 services

Original Medicare services billed in 2022
Emergency department visit with high level of medical decision making132$19,589$145
Critical care, first 30-74 minutes64$11,090$173
Emergency department visit with moderate level of medical decision making46$3,780$80
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only131$834$6
Emergency department visit with low level of medical decision making20$826$39

2021: 4 services

Original Medicare services billed in 2021
Emergency department visit with high level of medical decision making17$2,450$144
Critical care, first 30-74 minutes12$2,137$178
Emergency department visit with moderate level of medical decision making14$1,387$99
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only19$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.

Largest Medicaid services in 2024
EMERGENCY DEPARTMENT VISIT HIGH MDM536$89,226
Medicaid work by year
2024536165$89,226
2023315252$36,276
20221,2421156$61,727
2021398952$109,264
See the largest Medicaid services in earlier years

2023

Largest Medicaid services in 2023
EMERGENCY DEPARTMENT VISIT HIGH MDM253$32,759
EMERGENCY DEPT VISIT MOD MDM62$3,516

2022

Largest Medicaid services in 2022
EMERGENCY DEPARTMENT VISIT HIGH MDM304$23,544
EMERGENCY DEPT VISIT MOD MDM351$20,167
EMERGENCY DEPT VISIT LOW MDM283$11,354
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only144$1,573
Service42$1,572
Critical care, evaluation and management of the critically ill or critically injured patient; first 30-74 minutes12$1,364
EMERGENCY DEPARTMENT VISIT STRAIGHTFORWARD MDM52$1,122
Service12$613
Return visit (30+ min)12$233
COMPREHENSIVE METABOLIC PANEL15$106
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count15$78

2021

Largest Medicaid services in 2021
Service102$96,388
EMERGENCY DEPT VISIT MOD MDM89$5,654
EMERGENCY DEPT VISIT LOW MDM60$2,463
EMERGENCY DEPARTMENT VISIT HIGH MDM26$2,345
Service29$1,082
EMERGENCY DEPARTMENT VISIT STRAIGHTFORWARD MDM40$945
Electrocardiogram, routine ECG with at least 12 leads; interpretation and report only26$282
COMPREHENSIVE METABOLIC PANEL12$60
Blood count; complete (CBC), automated (Hgb, Hct, RBC, WBC and platelet count) and automated differential WBC count14$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.

Largest Part D drug costs
Albuterol Sulfate Hfa22$492$22
Ofloxacin12$169$14
Prednisone19$130$7
Cephalexin15$118$8
Hydrocodone-Acetaminophen12$91$8

Year by year

Part D prescribing by year
20241921278% (16)16%$3,947
2023967017% (16)None$1,457
20227157NoneNone$839
202129230% (0)0%$170
202012NoneNoneNone$383
20181414NoneNone$327
201612None0% (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

Part D drugs prescribed in 2023
Hydrocodone-Acetaminophen14$98$7
Cephalexin11$97$9

Money from drug and device companies

$18 in 2024

Industry payments by year
202411None$18
202323None$270

Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.

A payment is not proof that care is biased.

Payments by company
Agile TherapeuticsTwirla$18
1 payment
  • Meals for Twirla · 2024-04-11 · $18
See the published payment
Every published payment
Agile TherapeuticsMeals · 2024-04-11Twirla$18
See earlier years (2023)

2023: $270

Payments by company in 2023
Abbott LaboratoriesInfinity$162
2 payments
  • Meals for Infinity · 2023-10-19 · $31
  • Meals for Infinity · 2023-08-14 · $131
Baxter HealthcareNone$108
1 payment
  • Meals · 2023-10-24 · $108

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.