Kristoffer N Chang, MD
Plastic and Reconstructive Surgery · San Francisco
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 12
- 2 carriers
- Office
- 1
- Since medical school
- 49 years
- University of Utah School of Medicine, 1977
Offices
1 location
Hospitals listed: California Pacific Medical Ctr-Davies Campus Hosp. That is not proof they admit you there this week.
Plans that list them
12 plans · 2 carriers
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Chang’s office at (415) 923-3860 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
12 of 12 plans
| Alignment Health BreathEasy (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Clarity (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Harmony (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes CalPlus (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health Heart & Diabetes Care (HMO C-SNP) | Alignment Health Plan | Listed | Sep 28, 2026 |
| Alignment Health Heart & Diabetes Choice (HMO C-SNP) | Alignment Health Plan | Listed | Sep 28, 2026 |
| Alignment Health Honor+ Plan (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health My Choice CalCare (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| 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 |
California Medical Board record
Licence G36914 · Current
Licensed to practise in California · since 1978 · expires 2028-01-31 · University of Utah School of Medicine.
No disciplinary actions, convictions, malpractice judgments or citations in this record.
School, training and certification
What this clinician told their state board, medical school and everything before it. Only some states publish this, so nothing here means the state does not say, not that there was no training or certification.
Specialty certification
- American Board of Plastic Surgery - Plastic Surgery
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.
- California Pacific Medical Ctr-Davies Campus HospSan Francisco, CAAcute Care Hospital · Voluntary non-profit - Other · No emergency departmentPart of Sutter Health, which runs 27 hospitals in 2 statesPatients rate it 3 of 5 · 74% would definitely recommend itOverall rating: 3 of 5 starsBetter than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.187, Oct 2024 – Sep 2025
See every measure and the patient survey for California Pacific Medical Ctr-Davies Campus Hosp
Behind the star rating — Deaths: 0 better, 4 the same, 0 worse of 4 measures. Safety: 1 better, 5 the same, 0 worse of 6 measures. Readmissions: 0 better, 4 the same, 1 worse of 5 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 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.187 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 1.02 (0 to 2.09) · 232 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 0.98 (0.56 to 1.4) | No different | Jul 2022 – Jun 2024 |
| Death rate for heart failure patientsComplications and deaths | 10 · 72 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 15.1 · 106 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 10.4 · 257 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 3.8 · 721 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.26 (0.03 to 0.49) · 2,031 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.25 (0.04 to 0.45) · 2,032 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 3.35 (0.94 to 5.76) · 419 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.41 (0 to 3) · 211 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.84 (1.24 to 4.44) · 414 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 11.95 (2.91 to 20.98) · 218 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 5.61 (1.47 to 9.75) · 198 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.74 (0.22 to 3.26) · 52 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.32 (0 to 1.28) · 1,461 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 4.6 · 58 cases | None | Apr 2023 – Mar 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 1.756 | No different | Oct 2024 – Sep 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 22.1 · 91 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | 65.3 · 84 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | -26.6 · 115 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 16.4 · 142 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 5.5 · 55 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 19.6 · 25 cases | None | Jul 2023 – Jun 2025 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 1 (0.7 to 1.3) · 312 cases | No different | Jan 2024 – Dec 2024 |
What patients said (602 patients answered, 22% of those asked)
| Cleanliness | 4 |
| Nurse communication | 2 |
| Doctor communication | 4 |
| Communication about medicines | 3 |
| Discharge information | 3 |
| Overall hospital rating | 3 |
| Quietness | 2 |
| Recommend hospital | 4 |
| Room was "always" clean | 75% |
| Nurses "always" communicated well | 73% |
| Doctors "always" communicated well | 79% |
| Staff "always" explained | 59% |
| Yes, staff "did" give patients this information | 86% |
| Yes, staff "did" give patients information about help after discharge | 88% |
| Doctors "always" explained things so they could understand | 73% |
| Doctors "always" listened carefully | 78% |
| Doctors "always" treated them with courtesy and respect | 85% |
| Patients who gave a rating of "9" or "10" (high) | 70% |
| Staff "always" explained new medications | 72% |
| Nurses "always" explained things so they could understand | 68% |
| Nurses "always" listened carefully | 71% |
| Nurses "always" treated them with courtesy and respect | 81% |
| "Always" quiet at night | 46% |
| "YES", patients would definitely recommend the hospital | 74% |
| Staff "always" explained possible side effects | 46% |
| Yes, staff "did" give patients information about possible symptoms | 85% |
Original Medicare doctor bills
$11,892
Medicare paid this office $11,892 for 34 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| New patient visit (30+ min) | 17 | $1,801 | $106 |
| Short return visit (20+ min) | 12 | $1,444 | $76 |
Procedures Medicare counted
| Mastectomy | 1-10 | None |
| Melanoma (skin cancer) excision | 23 | More than 76% of doctors who do this |
| Removal of tissue | 1-10 | None |
| Removal or shaving of skin growth | 1-10 | None |
| Skin biopsy | 42 | More than 68% of doctors who do this |
Who their Medicare patients are
34 Original Medicare patients in 2024. Average age 75 · Health risk score 1.02. At or below the middle of the specialty; the typical plastic and reconstructive surgery clinician is at 1.21.
Conditions among them: High blood pressure 56%.
The office billed $32,684, Medicare allowed $15,350 and paid $11,892; for 75 services of 23 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 | 34 | 75 | 75 | 1.02 | $32,684 | $11,892 |
| 2023 | 49 | 108 | 77 | 1.07 | $37,337 | $15,308 |
| 2022 | 34 | 75 | 77 | 1.05 | $21,830 | $9,124 |
| 2021 | 46 | 87 | 77 | 0.80 | $32,518 | $12,940 |
| 2020 | 37 | 90 | 77 | 1.86 | $26,201 | $11,232 |
| 2019 | 44 | 125 | 76 | 1.28 | $42,598 | $17,551 |
| 2018 | 40 | 104 | 73 | 1.51 | $36,550 | $13,830 |
| 2017 | 41 | 110 | 75 | 1.30 | $34,422 | $13,964 |
| 2016 | 42 | 110 | 76 | 1.06 | $37,305 | $15,600 |
| 2015 | 50 | 114 | 73 | 1.39 | $34,445 | $15,917 |
| 2014 | 33 | 81 | 75 | 1.41 | $25,667 | $13,406 |
| 2013 | 40 | 81 | 71 | 0.95 | $33,461 | $17,177 |
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
| New patient visit (30+ min) | 13 | $1,260 | $97 |
2022: 1 service
| Short return visit | 13 | $1,017 | $51 |
2021: 1 service
| New patient visit (15+ min) | 18 | $1,259 | $70 |
2020: 2 services
| Short return visit | 14 | $1,057 | $38 |
| New patient visit (15+ min) | 12 | $655 | $55 |
2019: 1 service
| Short return visit (20+ min) | 12 | $766 | $59 |
2016: 1 service
| Short return visit | 12 | $871 | $41 |
2013: 1 service
| New patient visit (15+ min) | 12 | $766 | $64 |
Drugs they prescribed that Part D paid
$402
Pharmacies billed $402 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 28% of their Part D prescriptions (17 of 60) in 2024. Above the middle of the specialty; the typical plastic and reconstructive surgery clinician is at 28%. Surgeons prescribe little besides pain medicine after an operation, so their opioid share runs high.
52 generic and fewer than 11 brand-name prescriptions · $402 in drug cost · 24 antibiotic prescriptions to 21 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.
| Acetaminophen-Codeine | 15 | $143 | $10 |
| Cephalexin | 21 | $107 | $4 |
Year by year
| 2024 | 60 | 26 | 28% (17) | None | $402 |
| 2023 | 58 | 28 | 26% (15) | 29% | $397 |
| 2022 | 63 | 37 | 43% (27) | None | $364 |
| 2021 | 56 | 33 | 36% (20) | 20% | $620 |
| 2020 | 67 | 35 | 27% (18) | 28% | $546 |
| 2019 | 57 | 32 | 33% (19) | None | $433 |
| 2018 | 69 | 35 | 30% (21) | None | $897 |
| 2017 | 89 | 47 | 44% (39) | 19% | $654 |
| 2016 | 76 | 38 | 30% (23) | 16% | $691 |
| 2015 | 80 | 43 | 39% (31) | 14% | $678 |
| 2014 | 72 | 36 | 36% (26) | 15% | $702 |
| 2013 | 87 | 34 | 44% (38) | None | $689 |
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 | 20 | $156 | $8 |
| Acetaminophen-Codeine | 13 | $99 | $8 |
| Silver Sulfadiazine | 12 | $62 | $5 |
2022: 2 drugs
| Acetaminophen-Codeine | 13 | $94 | $7 |
| Cephalexin | 22 | $89 | $4 |
2021: 2 drugs
| Acetaminophen-Codeine | 17 | $124 | $7 |
| Cephalexin | 21 | $86 | $4 |
2020: 2 drugs
| Acetaminophen-Codeine | 14 | $94 | $7 |
| Cephalexin | 21 | $87 | $4 |
2019: 2 drugs
| Cephalexin | 22 | $122 | $6 |
| Acetaminophen-Codeine | 13 | $85 | $7 |
2018: 2 drugs
| Acetaminophen-Codeine | 16 | $111 | $7 |
| Cephalexin | 23 | $111 | $5 |
2017: 2 drugs
| Acetaminophen-Codeine | 30 | $152 | $5 |
| Cephalexin | 25 | $101 | $4 |
2016: 2 drugs
| Cephalexin | 27 | $146 | $5 |
| Acetaminophen-Codeine | 15 | $106 | $7 |
2015: 2 drugs
| Cephalexin | 30 | $162 | $5 |
| Acetaminophen-Codeine | 19 | $115 | $6 |
2014: 2 drugs
| Cephalexin | 24 | $140 | $6 |
| Acetaminophen-Codeine | 18 | $112 | $6 |
2013: 3 drugs
| Hydrocodone-Acetaminophen | 22 | $183 | $8 |
| Cephalexin | 24 | $120 | $5 |
| Acetaminophen-Codeine | 15 | $88 | $6 |
Professional record
- NPI
- 1790761336
- Licence
- CA G36914California G36914: Current · expires 2028-01-31
- Trained
- University of Utah School of Medicine, 1977 · 49 years ago
- Gender
- Male
More record details
- Sole proprietor
- Yes
- Taxonomy
- Federal specialty code 174400000X (174400000X)
- Mailing address
- 2100 Webster St, Suite#328, San Francisco, CA, 94115
- NPI first listed
- 2005-12-15
- NPI last updated
- 2010-07-23
This is when the NPI record was last certified, not a medical board exam.