Joanna Lin, MD
Internal Medicine · Redwood City
- 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
- Since medical school
- 23 years
- Georgetown University School of Medicine, 2003
Offices
1 location · Vituity Hospitalists PC · 78 clinicians in this group
Looking this up.
Hospitals listed: Sequoia Hospital. 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. Lin’s office at (650) 369-5811 to ask if they take your plan before you enroll.
California Medical Board record
Licence A88899 · Current
Licensed to practise in California · since 2004 · expires 2028-02-29 · Georgetown University 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 Internal Medicine - Internal Medicine
Checkups this office reported
Medicare did not publish checkup rates for this clinician.
- Medicare’s overall office score
- 72.0 / 100
- Scores the office’s reporting and systems. It is not a grade for how the doctor treats you.
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.
- Sequoia HospitalRedwood City, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of CommonSpirit Health, which runs 145 hospitals in 19 statesPatients rate it 4 of 5 · 81% would definitely recommend itOverall rating: 5 of 5 starsBetter than the national rate — Death rate among surgical inpatients with serious treatable complications: 104.12 (51.8 to 156.44) · 56 cases, Jul 2022 – Jun 2024Better than the national rate — Clostridium Difficile (C.Diff): 0, Oct 2024 – Sep 2025
See every measure and the patient survey for Sequoia Hospital
Behind the star rating — Deaths: 2 better, 6 the same, 0 worse of 8 measures. Safety: 1 better, 4 the same, 0 worse of 5 measures. Readmissions: 3 better, 6 the same, 0 worse of 9 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.
| Death rate among surgical inpatients with serious treatable complicationsComplications and deaths | 104.12 (51.8 to 156.44) · 56 cases | Better | Jul 2022 – Jun 2024 |
| Clostridium Difficile (C.Diff)Infections | 0 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 0.95 (0 to 1.98) · 472 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 0.91 (0.58 to 1.24) | No different | Jul 2022 – Jun 2024 |
| Death rate for CABG surgery patientsComplications and deaths | 1.8 · 68 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart attack patientsComplications and deaths | 12.5 · 72 cases | None | Jul 2022 – Jun 2025 |
| Death rate for heart failure patientsComplications and deaths | 9.1 · 258 cases | None | Jul 2022 – Jun 2025 |
| Death rate for pneumonia patientsComplications and deaths | 15.5 · 171 cases | None | Jul 2022 – Jun 2025 |
| Death rate for stroke patientsComplications and deaths | 9.3 · 81 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 3.2 · 1,231 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.23 (0.01 to 0.44) · 3,018 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.23 (0.03 to 0.44) · 3,164 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 2.59 (0.47 to 4.71) · 1,402 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.47 (0.04 to 2.9) · 926 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 1.68 (0.21 to 3.16) · 1,310 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 9.54 (4.42 to 14.67) · 978 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 4.98 (1.61 to 8.36) · 924 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.69 (0.19 to 3.19) · 192 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.57 (0 to 1.43) · 2,501 cases | No different | Jul 2022 – Jun 2024 |
| Rate of complications for hip/knee replacement patientsComplications and deaths | 3.5 · 332 cases | None | Apr 2023 – Mar 2025 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.702 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 0.853 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 14.2 · 67 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 22.3 · 295 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart attack patientsUnplanned return visits | -27.1 · 76 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | -22.3 · 304 cases | None | Jul 2022 – Jun 2025 |
| Hospital return days for pneumonia patientsUnplanned return visits | -4.6 · 178 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 17.3 · 180 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission after hip/knee replacementUnplanned return visits | 5.1 · 305 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 10.9 · 41 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 19.7 · 29 cases | None | Jul 2023 – Jun 2025 |
| Rate of unplanned hospital visits after colonoscopy (per 1,000 colonoscopies)Unplanned return visits | 13.1 (9.7 to 17.7) · 129 cases | No different | Jan 2022 – Dec 2024 |
| Ratio of unplanned hospital visits after hospital outpatient surgeryUnplanned return visits | 0.9 (0.7 to 1.2) · 713 cases | No different | Jan 2024 – Dec 2024 |
What patients said (631 patients answered, 27% of those asked)
| Cleanliness | 4 |
| Nurse communication | 4 |
| Doctor communication | 4 |
| Communication about medicines | 3 |
| Discharge information | 4 |
| Overall hospital rating | 4 |
| Quietness | 3 |
| Recommend hospital | 5 |
| Room was "always" clean | 78% |
| Nurses "always" communicated well | 80% |
| Doctors "always" communicated well | 82% |
| Staff "always" explained | 60% |
| Yes, staff "did" give patients this information | 88% |
| Yes, staff "did" give patients information about help after discharge | 86% |
| Doctors "always" explained things so they could understand | 76% |
| Doctors "always" listened carefully | 81% |
| Doctors "always" treated them with courtesy and respect | 89% |
| Patients who gave a rating of "9" or "10" (high) | 77% |
| Staff "always" explained new medications | 76% |
| Nurses "always" explained things so they could understand | 77% |
| Nurses "always" listened carefully | 77% |
| Nurses "always" treated them with courtesy and respect | 88% |
| "Always" quiet at night | 55% |
| "YES", patients would definitely recommend the hospital | 81% |
| Staff "always" explained possible side effects | 44% |
| Yes, staff "did" give patients information about possible symptoms | 91% |
Original Medicare doctor bills
$43,566
Medicare paid this office $43,566 for 202 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 114 | $21,353 | $105 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 66 | $9,944 | $148 |
| Hospital discharge day management, more than 30 minutes | 75 | $7,536 | $100 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 39 | $3,963 | $70 |
Who their Medicare patients are
202 Original Medicare patients in 2024. Average age 82 · 85 and older 39% · Women 55% · Also on Medicaid 11% · Health risk score 2.34. Above the middle of the specialty; the typical internal medicine clinician is at 1.76.
Conditions among them: High blood pressure 75% · Coronary heart disease 47% · Chronic kidney disease 47% · Atrial fibrillation 46% · Heart failure 39% · Diabetes 32% · Depression 31% · Dementia 31% · COPD 26% · Cancer 23% · Stroke 16%.
The office billed $285,204, Medicare allowed $55,342 and paid $43,566; for 413 services of 7 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 | 202 | 413 | 82 | 2.34 | $285,204 | $43,566 |
| 2023 | 160 | 308 | 81 | 2.22 | $203,625 | $33,091 |
| 2022 | 194 | 398 | 81 | 1.89 | $231,459 | $37,226 |
| 2021 | 212 | 496 | 82 | 2.16 | $291,342 | $50,032 |
| 2020 | 157 | 341 | 79 | 2.41 | $187,701 | $34,524 |
| 2019 | 171 | 412 | 80 | 2.47 | $193,148 | $37,509 |
| 2018 | 200 | 451 | 80 | 2.20 | $164,121 | $41,935 |
| 2017 | 158 | 340 | 81 | 2.30 | $116,465 | $34,429 |
| 2016 | 210 | 479 | 82 | 2.12 | $154,977 | $48,649 |
| 2015 | 176 | 381 | 83 | 1.92 | $112,795 | $36,884 |
| 2014 | 187 | 410 | 82 | 1.71 | $118,825 | $39,480 |
| 2013 | 85 | 179 | 83 | 2.34 | $48,596 | $16,308 |
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
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 89 | $17,187 | $105 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 48 | $7,631 | $153 |
| Hospital discharge day management, more than 30 minutes | 47 | $4,999 | $102 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 30 | $2,532 | $68 |
2022: 5 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 93 | $14,770 | $91 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 39 | $6,811 | $175 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 64 | $6,272 | $63 |
| Hospital discharge day management, more than 30 minutes | 65 | $6,248 | $95 |
| Initial hospital observation care per day, typically 70 minutes | 11 | $1,740 | $158 |
2021: 6 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 123 | $21,885 | $92 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 75 | $13,330 | $175 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 54 | $5,972 | $64 |
| Hospital discharge day management, more than 30 minutes | 57 | $5,701 | $97 |
| Initial hospital observation care per day, typically 70 minutes | 11 | $1,784 | $162 |
| Hospital observation care on day of discharge | 11 | $722 | $66 |
2020: 5 services
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 70 | $12,258 | $94 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 52 | $9,335 | $180 |
| Hospital discharge day management, more than 30 minutes | 50 | $4,907 | $98 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 51 | $4,816 | $65 |
| Hospital observation care on day of discharge | 11 | $730 | $66 |
2019: 5 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 93 | $10,383 | $64 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 63 | $9,124 | $92 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 41 | $7,352 | $179 |
| Hospital discharge day management, more than 30 minutes | 62 | $6,193 | $97 |
| Initial hospital observation care per day, typically 70 minutes | 13 | $2,140 | $165 |
2018: 4 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 101 | $10,996 | $65 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 77 | $10,190 | $93 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 55 | $9,865 | $179 |
| Hospital discharge day management, more than 30 minutes | 62 | $6,246 | $98 |
2017: 5 services
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 54 | $9,739 | $180 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 60 | $9,207 | $93 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 55 | $5,477 | $64 |
| Hospital discharge day management, more than 30 minutes | 51 | $5,081 | $98 |
| Initial hospital observation care per day, typically 70 minutes | 11 | $1,823 | $166 |
2016: 5 services
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 81 | $14,791 | $180 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 80 | $12,414 | $93 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 83 | $9,522 | $64 |
| Hospital discharge day management, more than 30 minutes | 71 | $7,212 | $97 |
| Initial hospital observation care per day, typically 70 minutes | 13 | $2,149 | $165 |
2015: 6 services
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 49 | $8,756 | $179 |
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 83 | $8,367 | $64 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 60 | $7,911 | $93 |
| Hospital discharge day management, more than 30 minutes | 62 | $6,071 | $98 |
| Initial hospital observation care per day, typically 70 minutes | 18 | $2,993 | $166 |
| Hospital observation care on day of discharge | 15 | $991 | $66 |
2014: 6 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 111 | $13,066 | $64 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 70 | $12,812 | $178 |
| Hospital discharge day management, more than 30 minutes | 61 | $6,193 | $97 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 23 | $2,683 | $93 |
| Initial hospital observation care per day, typically 70 minutes | 15 | $2,469 | $165 |
| Hospital observation care on day of discharge | 12 | $785 | $65 |
2013: 3 services
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 57 | $6,604 | $63 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 35 | $5,862 | $167 |
| Hospital discharge day management, more than 30 minutes | 23 | $2,198 | $96 |
Drugs they prescribed that Part D paid
$9,559
Pharmacies billed $9,559 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
74 generic and 11 brand-name prescriptions · $9,559 in drug cost · 27 antibiotic prescriptions to 18 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.
Year by year
| 2024 | 85 | 44 | None | 13% | $9,559 |
| 2023 | 46 | 31 | None | None | $1,262 |
| 2022 | 59 | 36 | None | None | $4,889 |
| 2021 | 69 | 41 | None | None | $15,489 |
| 2020 | 66 | 34 | None | 23% | $8,051 |
| 2019 | 72 | 35 | None | None | $4,103 |
| 2018 | 62 | 39 | None | None | $3,343 |
| 2017 | 67 | 33 | None | None | $2,665 |
| 2016 | 60 | 33 | 0% (0) | None | $4,553 |
| 2015 | 102 | 47 | None | None | $7,847 |
| 2014 | 88 | 35 | None | 25% | $5,580 |
| 2013 | 56 | 28 | None | 29% | $4,261 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2015: 1 drug
| Levofloxacin | 14 | $135 | $10 |
Money from drug and device companies
$47 in 2025
A payment is not proof that care is biased.
| PolyNovo North America | Novosorb Btm | $47 | 1 payment
|
See the published payment
| PolyNovo North America | Meals · 2025-07-21 | Novosorb Btm | $47 |
Professional record
- NPI
- 1043276496
- Licence
- CA A88899California A88899: Current · expires 2028-02-29
- Trained
- Georgetown University School of Medicine, 2003 · 23 years ago
- Gender
- Female
More record details
- Sole proprietor
- No
- Medicaid ID
- CA 00A88990
- Taxonomy
- Internal medicine (207R00000X)
- Mailing address
- 751 S Bascom Ave, San Jose, CA, 95128
- NPI first listed
- 2006-04-25
- NPI last updated
- 2007-09-12
This is when the NPI record was last certified, not a medical board exam.