Mary Elizabeth Hartnett, MD
Ophthalmology · Stanford
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 18
- 4 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
18 plans · 4 carriers
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Hartnett’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
18 of 18 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 |
| SCAN Balance (HMO C-SNP) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN Classic (HMO) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN MyChoice (HMO) | SCAN Health Plan | Listed | Oct 3, 2026 |
| SCAN Strive (HMO C-SNP) | SCAN Health Plan | Listed | Oct 3, 2026 |
| DualConnect (HMO D-SNP) | Santa Clara Family Health Plan | Listed | Sep 1, 2026 |
California Medical Board record
Licence G185717 · Current
Licensed to practise in California · since 2023 · expires 2027-04-30 · Albany Medical College.
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
$5,599
Medicare paid this office $5,599 for 19 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Imaging of retina | 16 | $617 | $21 |
Who their Medicare patients are
19 Original Medicare patients in 2024. Average age 71 · Health risk score 1.18. Above the middle of the specialty; the typical ophthalmology clinician is at 1.16.
Conditions among them: High blood pressure 63% · Diabetes 63%.
The office billed $44,307, Medicare allowed $7,731 and paid $5,599; for 80 services of 11 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 | 19 | 80 | 71 | 1.18 | $44,307 | $5,599 |
| 2023 | 17 | 44 | 76 | 1.01 | $39,412 | $5,501 |
| 2022 | 90 | 576 | 76 | 1.48 | $143,783 | $28,400 |
| 2021 | 122 | 707 | 75 | 1.45 | $252,709 | $47,199 |
| 2020 | 119 | 633 | 75 | 1.34 | $209,047 | $38,727 |
| 2019 | 158 | 612 | 74 | 1.43 | $198,897 | $38,730 |
| 2018 | 154 | 579 | 73 | 1.29 | $194,129 | $38,319 |
| 2017 | 126 | 617 | 74 | 1.25 | $187,818 | $36,315 |
| 2016 | 107 | 506 | 73 | 1.26 | $231,357 | $38,502 |
| 2015 | 120 | 618 | 75 | 1.39 | $269,765 | $47,969 |
| 2014 | 126 | 679 | 75 | 1.43 | $274,392 | $49,809 |
| 2013 | 106 | 591 | 76 | 1.19 | $189,064 | $34,730 |
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
| Imaging of retina | 14 | $358 | $22 |
2022: 6 services
| Injection of drug into eye | 29 | $8,764 | $70 |
| Return visit (30+ min) | 38 | $3,734 | $59 |
| Imaging of retina | 79 | $3,674 | $18 |
| Short return visit (20+ min) | 44 | $3,428 | $48 |
| Long return visit (40+ min) | 35 | $3,390 | $89 |
| Photography of the retina | 33 | $540 | $15 |
2021: 6 services
| Injection of drug into eye | 36 | $12,396 | $70 |
| Long return visit (40+ min) | 67 | $7,784 | $101 |
| Imaging of retina | 110 | $4,722 | $18 |
| Return visit (30+ min) | 32 | $3,062 | $67 |
| Short return visit (20+ min) | 34 | $1,524 | $38 |
| Photography of the retina | 36 | $801 | $16 |
2020: 5 services
| Injection of drug into eye | 38 | $12,901 | $79 |
| Established patient complete exam of visual system | 89 | $5,679 | $49 |
| Imaging of retina | 102 | $4,162 | $18 |
| New patient complete exam of visual system | 16 | $1,008 | $63 |
| Photography of the retina | 30 | $504 | $14 |
2019: 6 services
| Injection of drug into eye | 39 | $10,550 | $75 |
| Established patient complete exam of visual system | 100 | $6,470 | $53 |
| Imaging of retina | 113 | $4,439 | $19 |
| New patient complete exam of visual system | 14 | $893 | $64 |
| Photography of the retina | 18 | $332 | $16 |
| Photography of the retina | 18 | $289 | $16 |
2018: 6 services
| Injection of drug into eye | 29 | $7,520 | $80 |
| Established patient complete exam of visual system | 102 | $7,275 | $52 |
| Imaging of retina | 114 | $4,151 | $18 |
| New patient complete exam of visual system | 11 | $637 | $58 |
| Photography of the retina | 23 | $393 | $17 |
| Photography of the retina | 19 | $324 | $16 |
2017: 5 services
| Established patient complete exam of visual system | 101 | $8,237 | $55 |
| Injection of drug into eye | 30 | $7,233 | $73 |
| Imaging of retina | 106 | $4,378 | $18 |
| Short return visit (20+ min) | 17 | $818 | $37 |
| Photography of the retina | 17 | $239 | $14 |
2016: 5 services
| Injection of drug into eye | 23 | $6,910 | $77 |
| Established patient complete exam of visual system | 77 | $6,187 | $55 |
| Imaging of retina | 93 | $4,181 | $21 |
| New patient complete exam of visual system | 14 | $1,080 | $77 |
| Established patient problem focused exam of visual system | 15 | $572 | $36 |
2015: 6 services
| Injection of drug into eye | 33 | $9,289 | $71 |
| Established patient complete exam of visual system | 84 | $6,424 | $50 |
| Imaging of retina | 85 | $4,277 | $20 |
| New patient complete exam of visual system | 18 | $1,184 | $66 |
| Exam of retinal blood vessels using a special camera after injection of a dye | 13 | $859 | $33 |
| Photography of the retina | 28 | $497 | $17 |
2014: 6 services
| Injection of drug into eye | 38 | $12,708 | $71 |
| Established patient complete exam of visual system | 86 | $6,961 | $55 |
| Imaging of retina | 94 | $5,369 | $21 |
| New patient complete exam of visual system | 18 | $1,262 | $70 |
| Established patient problem focused exam of visual system | 17 | $798 | $40 |
| Photography of the retina | 22 | $465 | $19 |
2013: 7 services
| Injection of drug into eye | 34 | $10,704 | $72 |
| Established patient complete exam of visual system | 75 | $6,559 | $55 |
| Imaging of retina | 75 | $4,348 | $21 |
| New patient complete exam of visual system | 16 | $996 | $62 |
| Established patient problem focused exam of visual system | 17 | $771 | $35 |
| Exam of retinal blood vessels using a special camera after injection of a dye | 11 | $683 | $36 |
| Photography of the retina | 23 | $395 | $16 |
Money from drug and device companies
$9,990 in 2025
| 2025 | 1 | 2 | $9,990 | $9,990 |
| 2024 | 1 | 33 | $49,580 | $51,797 |
| 2023 | 2 | 26 | None | $5,514 |
| 2022 | 2 | 2 | None | $126 |
| 2019 | 2 | 4 | $5,000 | $5,466 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Janssen Pharmaceuticals | None | $9,990 | 2 payments
|
See all 2 published payments
| Janssen Pharmaceuticals | Consulting · 2025-06-24 | None | $370 |
| Janssen Pharmaceuticals | Consulting · 2025-01-30 | None | $9,620 |
See earlier years (2024, 2023, 2022, 2019)
2024: $51,797
| Janssen Pharmaceuticals | None | $51,797 | 33 payments
|
2023: $5,514
| Janssen Pharmaceuticals | None | $5,394 | 25 payments
|
| Dutch Ophthalmic USA | Eva, Combined Machine | $119 | 1 payment
|
2022: $126
| Janssen Global Services | None | $114 | 1 payment
|
| Genentech | Vabysmo | $12 | 1 payment
|
2019: $5,466
| Bausch & Lomb a division of Bausch Health US | Victus | $5,261 | 3 payments
|
| Carl Zeiss Meditec | Clarus 700 | $206 | 1 payment
|
Research money
Money a company paid to run a study. Where it went to their institution, the clinician is named as an investigator and did not receive it; the amount covers the whole study, often across many sites.
| Regeneron Pharmaceuticals, Inc. · Randomized, Controlled, Multi-Center Study To Assess the Efficacy, Safety, and Tolerability of Intravitreal Aflibercept Compared To Laser Photocoagulation in Patients With Retinopathy of Prematurity · 2020 | Their institution | $10,850 |
| Regeneron Pharmaceuticals, Inc. · Randomized, Controlled, Multi-Center Study To Assess the Efficacy, Safety, and Tolerability of Intravitreal Aflibercept Compared To Laser Photocoagulation in Patients With Retinopathy of Prematurity · 2022 | Their institution | $3,200 |
| Regeneron Pharmaceuticals, Inc. · Randomized, Controlled, Multi-Center Study To Assess the Efficacy, Safety, and Tolerability of Intravitreal Aflibercept Compared To Laser Photocoagulation in Patients With Retinopathy of Prematurity · 2021 | Their institution | $2,350 |
Checkups this office reported
Medicare did not publish checkup rates for this clinician.
- Medicare’s overall office score
- 92.1 / 100
- Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.
Professional record
- NPI
- 1871507020
- Licence
- CA G185717, UT 7589802-1205, UT 7589802-8905California G185717: Current · expires 2027-04-30
- Trained
- Albany Medical College of Union University, 1983
- Group
- Stanford Health Care
- Gender
- Female
More record details
- Sole proprietor
- No
- Medicaid ID
- NC 891338F
- Taxonomy
- Federal specialty code 207WX0107X (207WX0107X); Federal specialty code 207W00000X (207W00000X)
- Mailing address
- 300 Pasteur Dr, Stanford, CA, 94305
- NPI first listed
- 2006-07-27
- NPI last updated
- 2024-04-03
- NPI record certified
- 2024-04-03
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 65 Mario Capecchi Dr, Salt Lake City, UT, 84132
This office lists an electronic records connection.