Mary T Hawn, MD
General Surgery · Redwood City
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 14
- 3 carriers
- Offices
- 3
Offices
3 locations · Stanford Health Care · 3,152 clinicians in this group
Hospitals listed: Stanford Health Care. That is not proof they admit you there this week.
Plans that list them
14 plans · 3 carriers
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Hawn’s office at (650) 723-4000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
14 of 14 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 |
| DualConnect (HMO D-SNP) | Santa Clara Family Health Plan | Listed | Sep 1, 2026 |
California Medical Board record
Licence G136685 · Current
Licensed to practise in California · since 2015 · expires 2028-09-30 · University of Michigan Medical School.
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
$72,644
Medicare paid this office $72,644 for 145 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Repair of hernia of muscle at esophagus and stomach using an endoscope | 26 | $32,652 | $1,256 |
| New patient visit (45+ min) | 61 | $7,938 | $130 |
| Short return visit (20+ min) | 48 | $4,300 | $73 |
| Return visit (30+ min) | 13 | $1,389 | $99 |
| New patient visit (30+ min) | 11 | $834 | $76 |
Procedures Medicare counted
| Hernia repair - groin (open) | 1-10 | None |
| Hernia repair (minimally invasive) | 1-10 | None |
| Upper gastrointestinal (GI) endoscopy for acid reflux | 37 | More than 59% of doctors who do this |
Who their Medicare patients are
145 Original Medicare patients in 2024. Average age 73 · Women 57% · Also on Medicaid 17% · Health risk score 1.14. At or below the middle of the specialty; the typical general surgery clinician is at 1.69.
Conditions among them: High blood pressure 63% · Coronary heart disease 34% · Depression 28% · Diabetes 21% · Chronic kidney disease 21% · Atrial fibrillation 20% · Cancer 15% · COPD 14% · Heart failure 10%.
The office billed $402,994, Medicare allowed $93,166 and paid $72,644; for 233 services of 30 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 | 145 | 233 | 73 | 1.14 | $402,994 | $72,644 |
| 2023 | 142 | 225 | 71 | 1.15 | $376,900 | $70,274 |
| 2022 | 131 | 205 | 72 | 1.21 | $286,612 | $58,303 |
| 2021 | 142 | 261 | 70 | 1.52 | $351,583 | $76,382 |
| 2020 | 142 | 312 | 71 | 1.45 | $452,632 | $85,063 |
| 2019 | 136 | 280 | 68 | 1.91 | $396,073 | $79,799 |
| 2018 | 115 | 238 | 71 | 1.55 | $284,524 | $53,620 |
| 2017 | 97 | 179 | 71 | 1.62 | $267,907 | $47,728 |
| 2016 | 73 | 121 | 70 | 1.49 | $158,046 | $32,787 |
| 2015 | 127 | 228 | 67 | 1.99 | $279,964 | $49,528 |
| 2014 | 283 | 584 | 67 | 1.48 | $832,401 | $135,071 |
| 2013 | 273 | 525 | 67 | 1.92 | $773,128 | $129,950 |
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: 4 services
| Repair of hernia of muscle at esophagus and stomach using an endoscope | 23 | $31,186 | $1,356 |
| New patient visit (45+ min) | 57 | $6,364 | $112 |
| Short return visit (20+ min) | 49 | $3,270 | $57 |
| Return visit (30+ min) | 11 | $888 | $81 |
2022: 4 services
| Repair of hernia of muscle at esophagus and stomach using an endoscope | 16 | $21,748 | $1,359 |
| New patient visit (45+ min) | 45 | $5,792 | $129 |
| Short return visit (20+ min) | 38 | $2,547 | $62 |
| New patient visit (30+ min) | 27 | $1,857 | $69 |
2021: 5 services
| Repair of hernia of muscle at esophagus and stomach using an endoscope | 26 | $36,031 | $1,386 |
| New patient visit (45+ min) | 62 | $8,033 | $130 |
| Short return visit (20+ min) | 39 | $2,934 | $60 |
| Return visit (30+ min) | 23 | $2,315 | $93 |
| New patient visit (30+ min) | 23 | $1,893 | $82 |
2020: 7 services
| Repair of hernia of muscle at esophagus and stomach using an endoscope | 27 | $37,748 | $1,398 |
| New patient visit (45+ min) | 56 | $5,906 | $105 |
| Lengthening of esophagus using an endoscope | 23 | $3,229 | $140 |
| Short return visit (20+ min) | 41 | $2,183 | $43 |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 18 | $1,172 | $65 |
| New patient visit (30+ min) | 17 | $1,007 | $59 |
| Short return visit | 12 | $329 | $24 |
2019: 7 services
| Repair of hernia of muscle at esophagus and stomach using an endoscope | 21 | $28,538 | $1,359 |
| New patient visit (45+ min) | 59 | $6,296 | $107 |
| Lengthening of esophagus using an endoscope | 18 | $2,458 | $137 |
| Long return visit (40+ min) | 11 | $1,099 | $100 |
| Short return visit (20+ min) | 23 | $1,010 | $37 |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 11 | $748 | $68 |
| New patient visit (30+ min) | 12 | $679 | $57 |
2018: 6 services
| Repair of hernia of muscle at esophagus and stomach using an endoscope | 15 | $20,019 | $1,251 |
| New patient visit (45+ min) | 27 | $2,581 | $96 |
| New patient visit (45+ min) | 22 | $2,510 | $114 |
| Lengthening of esophagus using an endoscope | 11 | $1,363 | $124 |
| Short return visit (20+ min) | 15 | $821 | $46 |
| Short return visit (20+ min) | 13 | $783 | $46 |
2017: 4 services
| Repair of groin hernia using an endoscope | 15 | $6,704 | $447 |
| New patient visit (45+ min) | 36 | $3,904 | $108 |
| New patient visit (30+ min) | 22 | $1,267 | $58 |
| Short return visit (20+ min) | 13 | $593 | $46 |
2016: 3 services
| New patient visit (45+ min) | 25 | $2,798 | $112 |
| New patient visit (30+ min) | 24 | $1,492 | $62 |
| Short return visit (20+ min) | 14 | $729 | $46 |
2015: 5 services
| New patient visit (45+ min) | 41 | $3,420 | $83 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes | 11 | $974 | $30 |
| New patient visit (30+ min) | 14 | $852 | $61 |
| Return visit (30+ min) | 22 | $797 | $36 |
| Short return visit (20+ min) | 21 | $556 | $25 |
2014: 13 services
| Repair of hernia of muscle at esophagus and stomach using an endoscope | 32 | $36,020 | $1,126 |
| Repair of muscle at lower esophagus and stomach using an endoscope | 15 | $12,255 | $766 |
| Strengthening of muscle between esophagus and stomach by wrapping part of stomach around esophagus using an endoscope | 15 | $11,833 | $789 |
| New patient visit (45+ min) | 77 | $7,381 | $96 |
| New patient visit (60+ min) | 38 | $4,653 | $122 |
| Short return visit (20+ min) | 42 | $1,907 | $38 |
| Return visit (30+ min) | 34 | $1,885 | $54 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes | 20 | $1,875 | $25 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 13 | $1,333 | $103 |
| New patient visit (45+ min) | 16 | $1,329 | $83 |
| Insertion of stomach tube using a flexible endoscope | 13 | $1,192 | $92 |
| Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes | 13 | $979 | $75 |
| Short return visit (20+ min) | 11 | $298 | $25 |
2013: 11 services
| Repair of hernia of muscle at esophagus and stomach using an endoscope | 19 | $20,835 | $1,097 |
| Strengthening of muscle between esophagus and stomach by wrapping part of stomach around esophagus using an endoscope | 25 | $17,981 | $719 |
| New patient visit (45+ min) | 83 | $9,268 | $112 |
| New patient visit (60+ min) | 30 | $4,074 | $136 |
| Return visit (30+ min) | 37 | $2,405 | $63 |
| Short return visit (20+ min) | 41 | $2,147 | $48 |
| Subsequent hospital care with straightforward or low level of medical decision making, per day at least 25 minutes | 32 | $1,845 | $28 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 17 | $1,691 | $99 |
| Long return visit (40+ min) | 15 | $1,562 | $104 |
| Initial hospital care with straightforward or low level of medical decision making, per day at least 40 minutes | 13 | $880 | $68 |
| New patient visit (30+ min) | 11 | $737 | $67 |
Medicaid work
$6,471 in 2024
Medicaid paid $6,471 for 62 billed services this clinician did in 2024, up to 18 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.
| New patient visit (45+ min) | 62 | $6,471 |
| 2024 | 62 | 1 | 18 | $6,471 |
| 2023 | 12 | 1 | 12 | $1,054 |
See the largest Medicaid services in earlier years
2023
| New patient visit (45+ min) | 12 | $1,054 |
Money from drug and device companies
$933 in 2025
| 2025 | 5 | 8 | None | $933 |
| 2024 | 2 | 9 | $11,657 | $13,123 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Intuitive Surgical | Da Vinci Surgical System | $376 | 2 payments
|
| Ethicon US | Surgicel Nu-Knit | $207 | 3 payments
|
| Dilon Technologies | Hemoblast Bellows | $175 | 1 payment
|
| Abbvie | Natrelle Saline-Filled Breast Implants | $147 | 1 payment
|
| Mauna Kea Technologies | None | $29 | 1 payment
|
See all 8 published payments
| Abbvie | Meals · 2025-12-16 | Natrelle Saline-Filled Breast Implants | $147 |
| Intuitive Surgical | Travel · 2025-11-10 | Da Vinci Surgical System | $346 |
| Intuitive Surgical | Travel · 2025-11-10 | Da Vinci Surgical System | $30 |
| Ethicon US | Meals · 2025-11-03 | Surgicel Nu-Knit | $51 |
| Ethicon US | Meals · 2025-10-31 | Surgicel Nu-Knit | $125 |
| Ethicon US | Meals · 2025-10-27 | Surgicel Nu-Knit | $31 |
| Mauna Kea Technologies | Meals · 2025-07-21 | None | $29 |
| Dilon Technologies | Meals · 2025-05-03 | Hemoblast Bellows | $175 |
See earlier years (2024)
2024: $13,123
| Ethicon US | Echelon; Endopath | $11,775 | 2 payments
|
| Medical Device Business Services | None | $1,348 | 7 payments
|
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
- 1194751271
- Licence
- AL 24188, CA G136685California G136685: Current · expires 2028-09-30
- Trained
- University of Michigan Medical School, 1999
- Group
- Stanford Health Care
- Video visits
- Lists video visits
- Gender
- Female
More record details
- Sole proprietor
- No
- Medicaid ID
- AL 009966090, AL 051503879
- Taxonomy
- Surgery (208600000X)
- Mailing address
- 300 Pasteur Dr, Palo Alto, CA, 94304
- NPI first listed
- 2006-06-23
- NPI last updated
- 2024-04-27
- NPI record certified
- 2024-04-27
This is when the NPI record was last certified, not a medical board exam.