Kristen K Mackenzie, MD
Anesthesiology · Stanford
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 13
- 2 carriers
- Office
- 1
Offices
1 location · Stanford Health Care · 3,152 clinicians in this group
Looking this up.
Hospitals listed: Stanford Health Care. That is not proof they admit you there this week.
Plans that list them
13 plans · 2 carriers
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Mackenzie’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
13 of 13 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 |
| Alignment Health Silicon (HMO C-SNP) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health smartHMO (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Alignment Health the ONE (HMO) | Alignment Health Plan | Listed | Oct 3, 2026 |
| Anthem Full Dual Advantage Aligned (HMO D-SNP) | Anthem Blue Cross | Listed | Oct 3, 2026 |
California Medical Board record
Licence A157928 · Current
Licensed to practise in California · since 2018 · expires 2028-08-31 · University of California San Francisco School of Medicine.
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.
- Stanford Health CareStanford, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency departmentPart of Stanford Health Care, which runs 3 hospitalsHome of Stanford Cancer Institute, a National Cancer Institute designated comprehensive cancer centrePatients rate it 4 of 5 · 83% would definitely recommend itOverall rating: 5 of 5 starsWorse than the national rate — Perioperative pulmonary embolism or deep vein thrombosis rate: 5.31 (4.24 to 6.37) · 8,661 cases, Jul 2022 – Jun 2024Worse than the national rate — Rate of inpatient admissions for patients receiving outpatient chemotherapy: 14.1 (12.7 to 15.7) · 2,191 cases, Jan 2024 – Dec 2024Better than the national rate — Postoperative respiratory failure rate: 4.08 (1.95 to 6.21) · 5,296 cases, Jul 2022 – Jun 2024Better than the national rate — Catheter Associated Urinary Tract Infections (ICU + select Wards): 0.317, Oct 2024 – Sep 2025Better than the national rate — Clostridium Difficile (C.Diff): 0.446, Oct 2024 – Sep 2025Better than the national rate — SSI - Colon Surgery: 0.241, Oct 2024 – Sep 2025Better than the national rate — Ratio of unplanned hospital visits after hospital outpatient surgery: 0.7 (0.6 to 0.9) · 3,348 cases, Jan 2024 – Dec 2024
See every measure and the patient survey for Stanford Health Care
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: 2 better, 5 the same, 4 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 | 5.31 (4.24 to 6.37) · 8,661 cases | Worse | Jul 2022 – Jun 2024 |
| Rate of inpatient admissions for patients receiving outpatient chemotherapyUnplanned return visits | 14.1 (12.7 to 15.7) · 2,191 cases | Worse | Jan 2024 – Dec 2024 |
| Postoperative respiratory failure rateComplications and deaths | 4.08 (1.95 to 6.21) · 5,296 cases | Better | Jul 2022 – Jun 2024 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.317 | Better | Oct 2024 – Sep 2025 |
| Clostridium Difficile (C.Diff)Infections | 0.446 | Better | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 0.241 | Better | Oct 2024 – Sep 2025 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 0.7 (0.6 to 0.9) · 3,348 cases | Better | Jan 2024 – Dec 2024 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 1.06 (0.45 to 1.67) · 5,374 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 0.86 (0.72 to 1) | No different | Jul 2022 – Jun 2024 |
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 166.09 (137.88 to 194.3) · 470 cases | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 1.1 · 192 cases | None | Jul 2022 – Jun 2025 |
| Death rate for COPD patientsComplications and deaths | 6.4 · 146 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 9.7 · 253 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 6.3 · 880 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 10.3 · 935 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 8.7 · 501 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 2.1 · 7,730 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.13 (0 to 0.27) · 20,799 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.28 (0.14 to 0.43) · 23,182 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 0.94 (0.2 to 1.68) · 5,694 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.36 (1.54 to 3.19) · 7,846 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 5.2 (3.76 to 6.64) · 5,603 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.38 (0.23 to 2.53) · 2,211 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.52 (0.21 to 0.83) · 19,915 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 3.6 · 416 cases | None | Apr 2023 – Mar 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 0.869 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0.857 | No different | Oct 2024 – Sep 2025 |
| SSI - Abdominal HysterectomyInfections | 0.368 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 16.2 · 247 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 20.5 · 1,021 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | 47.8 · 258 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -1.6 · 990 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | 20.8 · 976 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 16.5 · 959 cases | None | Jul 2023 – Jun 2025 |
| Rate of emergency department (ED) visits for patients receiving outpatient chemotherapyUnplanned return visits | 5.2 (4.4 to 6.2) · 2,191 cases | No different | Jan 2024 – Dec 2024 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 5.1 · 425 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 9.6 · 158 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 19.6 · 183 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 12.7 (10.4 to 15.4) · 4,578 cases | No different | Jan 2022 – Dec 2024 |
What patients said (6,810 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 | 75% |
| Nurses "always" communicated well | 82% |
| Doctors "always" communicated well | 81% |
| Staff "always" explained | 63% |
| Yes, staff "did" give patients this information | 89% |
| Yes, staff "did" give patients information about help after discharge | 89% |
| Doctors "always" explained things so they could understand | 76% |
| Doctors "always" listened carefully | 80% |
| Doctors "always" treated them with courtesy and respect | 87% |
| Patients who gave a rating of "9" or "10" (high) | 79% |
| Staff "always" explained new medications | 76% |
| Nurses "always" explained things so they could understand | 77% |
| Nurses "always" listened carefully | 79% |
| Nurses "always" treated them with courtesy and respect | 88% |
| "Always" quiet at night | 53% |
| "YES", patients would definitely recommend the hospital | 83% |
| Staff "always" explained possible side effects | 50% |
| Yes, staff "did" give patients information about possible symptoms | 90% |
Original Medicare doctor bills
$106,828
Medicare paid this office $106,828 for 311 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Return visit (30+ min) | 139 | $29,689 | $115 |
| Long return visit (40+ min) | 36 | $9,056 | $156 |
| New patient visit (60+ min) | 45 | $8,075 | $179 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 39 | $4,297 | $110 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 35 | $4,288 | $69 |
See all 17 services
| Return visit (30+ min) | 139 | $29,689 | $115 |
| Long return visit (40+ min) | 36 | $9,056 | $156 |
| New patient visit (60+ min) | 45 | $8,075 | $179 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 39 | $4,297 | $110 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 35 | $4,288 | $69 |
| Administration of psychological or neuropsychological test, first 30 minutes | 53 | $3,551 | $41 |
| Chronic pain management and treatment, monthly bundle including, diagnosis; assessment and monitoring; administration of a validated pain rating scale or tool; the development, implementation, revision, and/or maintenance of a person-centered care plan tha | 34 | $2,642 | $75 |
| Injection of trigger points, 3 or more muscles | 22 | $2,334 | $57 |
| Injection of lower or sacral spine facet joint using imaging guidance, single level | 17 | $2,134 | $107 |
| Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's | 75 | $1,837 | $15 |
| Each additional 15 minutes of chronic pain management and treatment by a physician or other qualified health care professional, per calendar month. (list separately in addition to code for g3002. when using g3003, 15 minutes must be met or exceeded.) | 30 | $1,231 | $29 |
| Injection of lower or sacral spine facet joint using imaging guidance, second level | 16 | $1,106 | $58 |
| Injection of substance into lower spine canal using imaging guidance | 14 | $1,083 | $77 |
| Injection of trigger points, 1-2 muscles | 13 | $790 | $46 |
| Injection, ropivacaine hydrochloride, 1 mg | 53 | $372 | None |
| Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes | 22 | $251 | $10 |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 41 | $165 | None |
Who their Medicare patients are
311 Original Medicare patients in 2024. Average age 70 · Under 65 19% · 85 and older 8% · Women 67% · Also on Medicaid 29% · Health risk score 1.55. Above the middle of the specialty; the typical anesthesiology clinician is at 1.54.
Conditions among them: High blood pressure 62% · Depression 35% · Diabetes 26% · Coronary heart disease 22% · Chronic kidney disease 22% · Cancer 20% · Atrial fibrillation 16% · Heart failure 12% · COPD 12% · Dementia 8% · Stroke 6%.
The office billed $1,088,676, Medicare allowed $138,607 and paid $106,828; for 13,711 services of 57 kinds; $22,985 of it was for drugs given in the office and $83,843 for care.
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 | 311 | 13,711 | 70 | 1.55 | $1,088,676 | $106,828 |
| 2023 | 495 | 5,803 | 70 | 1.65 | $988,684 | $97,642 |
| 2022 | 124 | 189 | 69 | 1.28 | $180,089 | $13,924 |
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: 16 services
| Return visit (30+ min) | 136 | $20,225 | $100 |
| New patient visit (60+ min) | 88 | $15,163 | $172 |
| Long return visit (40+ min) | 76 | $12,982 | $148 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 88 | $10,195 | $71 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 84 | $10,165 | $116 |
| Injection of trigger points, 3 or more muscles | 56 | $3,746 | $42 |
| Telehealth originating site facility fee | 78 | $2,492 | $22 |
| Chronic pain management and treatment, monthly bundle including, diagnosis; assessment and monitoring; administration of a validated pain rating scale or tool; the development, implementation, revision, and/or maintenance of a person-centered care plan tha | 20 | $1,488 | $74 |
| Injection of lower or sacral spine facet joint using imaging guidance, single level | 11 | $1,277 | $116 |
| Administration of psychological or neuropsychological test, first 30 minutes | 23 | $1,263 | $42 |
| Aspiration and/or injection of fluid from large joint | 12 | $882 | $55 |
| Injection of trigger points, 1-2 muscles | 20 | $737 | $35 |
| Injection of lower or sacral spine facet joint using imaging guidance, second level | 11 | $703 | $64 |
| Injection, ropivacaine hydrochloride, 1 mg | 37 | $230 | None |
| Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito | 43 | $203 | $5 |
| Injection, triamcinolone acetonide, not otherwise specified, 10 mg | 23 | $102 | None |
2022: 5 services
| Return visit (30+ min) | 31 | $3,482 | $85 |
| New patient visit (60+ min) | 15 | $2,406 | $160 |
| Long return visit (40+ min) | 17 | $2,195 | $129 |
| Injection of trigger points, 3 or more muscles | 18 | $759 | $38 |
| Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito | 22 | $97 | $4 |
Medicaid work
$3,783 in 2024
Medicaid paid $3,783 for 96 billed services this clinician did in 2024, up to 15 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.
| Return visit (30+ min) | 72 | $2,943 |
| SBSQ HOSPITAL IP/OBS CARE MOD MDM 35 MINUTES | 24 | $840 |
| 2024 | 96 | 2 | 15 | $3,783 |
| 2023 | 255 | 5 | 27 | $9,019 |
See the largest Medicaid services in earlier years
2023
| Return visit (30+ min) | 112 | $3,575 |
| IP/OBS CONSLTJ NEW/EST PT MOD MDM 60 MINUTES | 30 | $2,637 |
| SBSQ HOSPITAL IP/OBS CARE MOD MDM 35 MINUTES | 74 | $2,052 |
| Telehealth originating site facility fee | 25 | $474 |
| 1ST HOSPITAL IP/OBS CARE MODERATE MDM 55 MINUTES | 14 | $281 |
Drugs they prescribed that Part D paid
$29,291
Pharmacies billed $29,291 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 19% of their Part D prescriptions (128 of 683) in 2024. Above the middle of the specialty; the typical anesthesiology clinician is at 0%. Long-acting opioids: 17% of their opioid prescriptions.
671 generic and 12 brand-name prescriptions · $29,291 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.
| Pregabalin | 82 | $4,196 | $51 |
| Buprenorphine | 15 | $3,698 | $247 |
| Duloxetine | 46 | $2,479 | $54 |
| Tizanidine | 85 | $1,824 | $21 |
| Gabapentin | 83 | $1,638 | $20 |
See all 19 drugs
| Pregabalin | 82 | $4,196 | $51 |
| Buprenorphine | 15 | $3,698 | $247 |
| Duloxetine | 46 | $2,479 | $54 |
| Tizanidine | 85 | $1,824 | $21 |
| Gabapentin | 83 | $1,638 | $20 |
| Baclofen | 47 | $1,494 | $32 |
| Clonidine | 23 | $1,119 | $49 |
| Lidocaine | 21 | $1,019 | $49 |
| Sumatriptan | 21 | $742 | $35 |
| Hydrocodone-Acetaminophen | 28 | $692 | $25 |
| Topiramate | 23 | $526 | $23 |
| Celecoxib | 17 | $425 | $25 |
| Tramadol | 40 | $399 | $10 |
| Oxycodone | 21 | $355 | $17 |
| Cyclobenzaprine | 21 | $319 | $15 |
| Meloxicam | 19 | $260 | $14 |
| Oxycodone-Acetaminophen | 14 | $179 | $13 |
| Clonidine | 13 | $125 | $10 |
| Nortriptyline | 13 | $103 | $8 |
Year by year
| 2024 | 683 | 129 | 19% (128) | 2% | $29,291 |
| 2023 | 584 | 140 | 17% (100) | None | $22,894 |
| 2022 | 184 | 68 | 18% (33) | None | $8,133 |
| 2021 | 53 | 18 | None | None | $4,803 |
| 2018 | 14 | None | 0% (0) | None | $556 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 14 drugs
| Duloxetine | 58 | $3,461 | $60 |
| Pregabalin | 59 | $2,651 | $45 |
| Gabapentin | 92 | $2,235 | $24 |
| Tizanidine | 72 | $2,079 | $29 |
| Clonidine | 24 | $1,378 | $57 |
| Celecoxib | 24 | $855 | $36 |
| Baclofen | 18 | $735 | $41 |
| Lidocaine | 18 | $727 | $40 |
| Hydrocodone-Acetaminophen | 35 | $546 | $16 |
| Meloxicam | 31 | $489 | $16 |
| Clonidine | 21 | $333 | $16 |
| Oxycodone-Acetaminophen | 11 | $191 | $17 |
| Oxycodone | 21 | $180 | $9 |
| Tramadol | 17 | $121 | $7 |
2022: 6 drugs
| Gabapentin | 45 | $1,917 | $43 |
| Pregabalin | 20 | $1,466 | $73 |
| Duloxetine | 14 | $939 | $67 |
| Baclofen | 13 | $656 | $50 |
| Hydrocodone-Acetaminophen | 15 | $286 | $19 |
| Naproxen | 11 | $201 | $18 |
2021: 2 drugs
| Gabapentin | 11 | $245 | $22 |
| Sumatriptan | 11 | $113 | $10 |
Money from drug and device companies
$135 in 2025
| 2025 | 1 | 1 | None | $135 |
| 2022 | 5 | 7 | None | $357 |
| 2021 | 1 | 1 | None | $21 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| SPR Therapeutics | Sprint Pns System | $135 | 1 payment
|
See the published payment
| SPR Therapeutics | Meals · 2025-06-07 | Sprint Pns System | $135 |
See earlier years (2022, 2021)
2022: $357
| Nalu Medical | Nalu Neurostimulation System | $135 | 1 payment
|
| Nevro | Omnia | $127 | 1 payment
|
| SPR Therapeutics | Sprint Pns System | $52 | 1 payment
|
| Abbott Laboratories | Proclaim | $22 | 1 payment
|
| Stimwave Technologies | Stimq Receiver Stimulator Kit Channel A US W/Receiver | $20 | 3 payments
|
2021: $21
| Medtronic | Restore | $21 | 1 payment
|
Checkups this office reported
Medicare did not publish checkup rates for this clinician.
- Medicare’s overall office score
- 76.5 / 100
- Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.
Professional record
- NPI
- 1164953360
- Licence
- CA A157928California A157928: Current · expires 2028-08-31
- Trained
- University of California, San Francisco School of Medicine, 2017
- Group
- Stanford Health Care
- Video visits
- Lists video visits
- Gender
- Female
More record details
- Sole proprietor
- No
- Taxonomy
- Federal specialty code 207LP2900X (207LP2900X); Federal specialty code 207L00000X (207L00000X); Student in a training program (390200000X)
- Mailing address
- 300 Pasteur Dr, Stanford, CA, 94305
- NPI first listed
- 2017-03-21
- NPI last updated
- 2024-04-11
- NPI record certified
- 2024-04-11
This is when the NPI record was last certified, not a medical board exam.