Stephen G Ong, MD
Internal Medicine · Santa Clara
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- Not verified
- Not the same as out of network.
- Offices
- 2
- Since medical school
- 22 years
- University of California, San Diego School of Medicine, 2004
Offices
2 locations · Permanente Medical Group Inc · 10,928 clinicians in this group
Hospitals listed: Kaiser Foundation Hospital-Santa Clara. 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. Ong’s office at (408) 851-1000 to ask if they take your plan before you enroll.
California Medical Board record
Licence A93783 · Current
Licensed to practise in California · since 2006 · expires 2027-09-30 · University of California, San Diego 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
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.
- Kaiser Foundation Hospital-Santa ClaraSanta Clara, CAAcute Care Hospital · Voluntary non-profit - Private · Has an emergency department · Birthing-friendlyPart of Kaiser Permanente, which runs 41 hospitals in 3 statesPatients rate it 3 of 5 · 75% would definitely recommend itOverall rating: 2 of 5 starsBetter than the national rate — Clostridium Difficile (C.Diff): 0.38, Oct 2024 – Sep 2025
See every measure and the patient survey for Kaiser Foundation Hospital-Santa Clara
Behind the star rating — Deaths: 0 better, 3 the same, 0 worse of 3 measures. Safety: 2 better, 4 the same, 0 worse of 6 measures. Readmissions: 0 better, 1 the same, 1 worse of 2 measures. The star rating is worked out from an earlier period than the measures below, so the two can disagree.
| Clostridium Difficile (C.Diff)Infections | 0.38 | Better | Oct 2024 – Sep 2025 |
| Abdominopelvic accidental puncture or laceration rateComplications and deaths | 1.01 (0 to 2.09) · 181 cases | No different | Jul 2022 – Jun 2024 |
| CMS Medicare PSI 90: Patient safety and adverse events compositeComplications and deaths | 1.02 (0.61 to 1.42) | No different | Jul 2022 – Jun 2024 |
| Death rate for stroke patientsComplications and deaths | 10.5 · 312 cases | None | Jul 2023 – Jun 2025 |
| Hybrid Hospital-Wide All-Cause Risk Standardized Mortality RateComplications and deaths | 3.8 · 3,736 cases | None | Jul 2024 – Jun 2025 |
| Iatrogenic pneumothorax rateComplications and deaths | 0.2 (0 to 0.43) · 910 cases | No different | Jul 2022 – Jun 2024 |
| In-hospital fall-associated fracture rateComplications and deaths | 0.26 (0.05 to 0.48) · 1,036 cases | No different | Jul 2022 – Jun 2024 |
| Perioperative pulmonary embolism or deep vein thrombosis rateComplications and deaths | 4.53 (2.03 to 7.03) · 235 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative acute kidney injury requiring dialysis rateComplications and deaths | 1.57 (0 to 3.25) · 83 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative hemorrhage or hematoma rateComplications and deaths | 2.5 (0.82 to 4.18) · 178 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative respiratory failure rateComplications and deaths | 11.73 (3.81 to 19.64) · 74 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative sepsis rateComplications and deaths | 5.31 (1.3 to 9.32) · 94 cases | No different | Jul 2022 – Jun 2024 |
| Postoperative wound dehiscence rateComplications and deaths | 1.75 (0.22 to 3.28) · 37 cases | No different | Jul 2022 – Jun 2024 |
| Pressure ulcer rateComplications and deaths | 0.34 (0 to 1.34) · 819 cases | No different | Jul 2022 – Jun 2024 |
| Catheter Associated Urinary Tract Infections (ICU + select Wards)Infections | 0.72 | No different | Oct 2024 – Sep 2025 |
| Central Line Associated Bloodstream Infection (ICU + select Wards)Infections | 1.049 | No different | Oct 2024 – Sep 2025 |
| MRSA BacteremiaInfections | 0.598 | No different | Oct 2024 – Sep 2025 |
| SSI - Colon SurgeryInfections | 0.926 | No different | Oct 2024 – Sep 2025 |
| Acute Myocardial Infarction (AMI) 30-Day Readmission RateUnplanned return visits | 13 · 589 cases | None | Jul 2023 – Jun 2025 |
| Heart failure (HF) 30-Day Readmission RateUnplanned return visits | 20.7 · 828 cases | None | Jul 2023 – Jun 2025 |
| Hospital return days for heart failure patientsUnplanned return visits | 107.6 · 27 cases | None | Jul 2022 – Jun 2025 |
| Pneumonia (PN) 30-Day Readmission RateUnplanned return visits | 17.9 · 642 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for CABGUnplanned return visits | 7.8 · 249 cases | None | Jul 2023 – Jun 2025 |
| Rate of readmission for chronic obstructive pulmonary disease (COPD) patientsUnplanned return visits | 20.6 · 181 cases | None | Jul 2023 – Jun 2025 |
What patients said (572 patients answered, 25% of those asked)
| Cleanliness | 4 |
| Nurse communication | 3 |
| Doctor communication | 4 |
| Communication about medicines | 2 |
| Discharge information | 4 |
| Overall hospital rating | 3 |
| Quietness | 2 |
| Recommend hospital | 4 |
| Room was "always" clean | 72% |
| Nurses "always" communicated well | 75% |
| Doctors "always" communicated well | 80% |
| Staff "always" explained | 57% |
| Yes, staff "did" give patients this information | 88% |
| Yes, staff "did" give patients information about help after discharge | 88% |
| Doctors "always" explained things so they could understand | 74% |
| Doctors "always" listened carefully | 79% |
| Doctors "always" treated them with courtesy and respect | 87% |
| 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 | 72% |
| Nurses "always" listened carefully | 71% |
| Nurses "always" treated them with courtesy and respect | 82% |
| "Always" quiet at night | 44% |
| "YES", patients would definitely recommend the hospital | 75% |
| Staff "always" explained possible side effects | 42% |
| Yes, staff "did" give patients information about possible symptoms | 89% |
Original Medicare doctor bills
$2,831
Medicare paid this office $2,831 for 14 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
Who their Medicare patients are
14 Original Medicare patients in 2024. Average age 66 · Health risk score 3.66. Sicker patients than 9 in 10 peers; the typical internal medicine clinician is at 1.76.
Conditions among them: High blood pressure 75%.
The office billed $8,993, Medicare allowed $3,553 and paid $2,831; for 34 services of 8 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 | 14 | 34 | 66 | 3.66 | $8,993 | $2,831 |
| 2023 | 11 | 32 | 71 | 3.01 | $8,393 | $2,812 |
| 2022 | 11 | 28 | 71 | 4.82 | $5,312 | $2,005 |
| 2019 | 17 | 31 | 72 | 2.49 | $6,697 | $2,231 |
| 2015 | 12 | 36 | 71 | 2.39 | $8,374 | $2,411 |
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
2019: 1 service
| Subsequent hospital care with moderate levelof medical decision making at least 35 minutes | 11 | $1,301 | $65 |
Drugs they prescribed that Part D paid
$24,620
Pharmacies billed $24,620 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 4% of their Part D prescriptions (14 of 376) in 2024. Above the middle of the specialty; the typical internal medicine clinician is at 1%.
346 generic and 30 brand-name prescriptions · $24,620 in drug cost · 19 antibiotic prescriptions to 17 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.
| Clopidogrel | 30 | $545 | $18 |
| Amiodarone | 17 | $510 | $30 |
| Atorvastatin | 35 | $482 | $14 |
| Metoprolol | 31 | $347 | $11 |
| Furosemide | 19 | $186 | $10 |
See all 11 drugs
| Clopidogrel | 30 | $545 | $18 |
| Amiodarone | 17 | $510 | $30 |
| Atorvastatin | 35 | $482 | $14 |
| Metoprolol | 31 | $347 | $11 |
| Furosemide | 19 | $186 | $10 |
| Pantoprazole | 13 | $180 | $14 |
| Losartan | 16 | $149 | $9 |
| Amlodipine Besylate | 12 | $149 | $12 |
| Lisinopril | 13 | $142 | $11 |
| Spironolactone | 13 | $135 | $10 |
| Oxycodone | 14 | $96 | $7 |
Year by year
| 2024 | 376 | 107 | 4% (14) | 8% | $24,620 |
| 2023 | 467 | 131 | None | 10% | $28,504 |
| 2022 | 537 | 124 | 3% (15) | None | $29,849 |
| 2021 | 435 | 124 | 4% (17) | None | $33,331 |
| 2020 | 395 | 109 | 4% (15) | 10% | $19,021 |
| 2019 | 446 | 127 | 4% (19) | None | $11,338 |
| 2018 | 448 | 127 | 7% (31) | None | $14,562 |
| 2017 | 419 | 119 | 4% (18) | None | $41,314 |
| 2016 | 517 | 134 | 6% (31) | 20% | $23,042 |
| 2015 | 409 | 122 | 7% (29) | None | $21,665 |
| 2014 | 453 | 122 | 8% (36) | None | $18,756 |
| 2013 | 377 | 113 | 7% (27) | None | $14,200 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 10 drugs
| Clopidogrel | 55 | $1,036 | $19 |
| Atorvastatin | 48 | $916 | $19 |
| Amiodarone | 27 | $913 | $34 |
| Metoprolol | 47 | $636 | $14 |
| Losartan | 23 | $346 | $15 |
| Pantoprazole | 18 | $234 | $13 |
| Furosemide | 19 | $198 | $10 |
| Amlodipine Besylate | 14 | $180 | $13 |
| Warfarin | 11 | $130 | $12 |
| Lisinopril | 11 | $128 | $12 |
2022: 14 drugs
| Pradaxa | 14 | $5,068 | $362 |
| Amiodarone | 30 | $1,042 | $35 |
| Clopidogrel | 54 | $987 | $18 |
| Metoprolol | 52 | $902 | $17 |
| Atorvastatin | 32 | $469 | $15 |
| Losartan | 30 | $373 | $12 |
| Amlodipine Besylate | 19 | $314 | $17 |
| Furosemide | 27 | $295 | $11 |
| Hydralazine | 12 | $286 | $24 |
| Lisinopril | 23 | $268 | $12 |
| Metoprolol | 27 | $238 | $9 |
| Warfarin | 18 | $210 | $12 |
| Oxycodone | 12 | $75 | $6 |
| Allopurinol | 11 | $33 | $3 |
2021: 12 drugs
| Clopidogrel | 46 | $857 | $19 |
| Metoprolol | 33 | $657 | $20 |
| Atorvastatin | 33 | $534 | $16 |
| Amiodarone | 14 | $475 | $34 |
| Lisinopril | 29 | $328 | $11 |
| Losartan | 26 | $328 | $13 |
| Warfarin | 25 | $305 | $12 |
| Amlodipine Besylate | 13 | $206 | $16 |
| Metoprolol | 18 | $150 | $8 |
| Furosemide | 12 | $135 | $11 |
| Oxycodone | 13 | $89 | $7 |
| Allopurinol | 12 | $38 | $3 |
2020: 10 drugs
| Clopidogrel | 38 | $813 | $21 |
| Atorvastatin | 41 | $766 | $19 |
| Amiodarone | 20 | $663 | $33 |
| Metoprolol | 23 | $467 | $20 |
| Lisinopril | 21 | $238 | $11 |
| Tamsulosin | 13 | $217 | $17 |
| Furosemide | 15 | $206 | $14 |
| Amlodipine Besylate | 17 | $169 | $10 |
| Oxycodone | 11 | $72 | $7 |
| Allopurinol | 13 | $42 | $3 |
2019: 11 drugs
| Atorvastatin | 49 | $1,276 | $26 |
| Clopidogrel | 39 | $900 | $23 |
| Amiodarone | 12 | $401 | $33 |
| Warfarin | 32 | $387 | $12 |
| Tamsulosin | 17 | $366 | $22 |
| Metoprolol | 37 | $323 | $9 |
| Lisinopril | 17 | $182 | $11 |
| Allopurinol | 13 | $168 | $13 |
| Furosemide | 13 | $148 | $11 |
| Losartan | 13 | $138 | $11 |
| Oxycodone | 11 | $77 | $7 |
2018: 10 drugs
| Atorvastatin | 45 | $1,192 | $26 |
| Amiodarone | 33 | $857 | $26 |
| Clopidogrel | 25 | $693 | $28 |
| Warfarin | 49 | $588 | $12 |
| Metoprolol | 60 | $529 | $9 |
| Oxycodone | 25 | $190 | $8 |
| Losartan | 15 | $183 | $12 |
| Lisinopril | 13 | $135 | $10 |
| Carvedilol | 12 | $117 | $10 |
| Furosemide | 13 | $112 | $9 |
2017: 11 drugs
| Hydralazine | 20 | $1,128 | $56 |
| Atorvastatin | 38 | $1,105 | $29 |
| Amiodarone | 19 | $528 | $28 |
| Clopidogrel | 13 | $387 | $30 |
| Warfarin | 31 | $358 | $12 |
| Gabapentin | 13 | $331 | $25 |
| Metoprolol | 36 | $299 | $8 |
| Furosemide | 20 | $220 | $11 |
| Losartan | 12 | $182 | $15 |
| Lisinopril | 15 | $170 | $11 |
| Carvedilol | 18 | $151 | $8 |
2016: 12 drugs
| Atorvastatin | 44 | $1,485 | $34 |
| Clopidogrel | 38 | $1,292 | $34 |
| Hydralazine | 18 | $697 | $39 |
| Amiodarone | 22 | $665 | $30 |
| Gabapentin | 14 | $562 | $40 |
| Metoprolol | 65 | $558 | $9 |
| Warfarin | 37 | $442 | $12 |
| Lisinopril | 38 | $431 | $11 |
| Pantoprazole | 11 | $317 | $29 |
| Furosemide | 27 | $258 | $10 |
| Losartan | 11 | $244 | $22 |
| Oxycodone | 18 | $224 | $12 |
2015: 9 drugs
| Clopidogrel | 25 | $1,280 | $51 |
| Atorvastatin | 25 | $954 | $38 |
| Metoprolol | 50 | $459 | $9 |
| Amiodarone | 14 | $420 | $30 |
| Losartan | 18 | $357 | $20 |
| Lisinopril | 29 | $354 | $12 |
| Furosemide | 29 | $328 | $11 |
| Oxycodone | 14 | $272 | $19 |
| Warfarin | 22 | $224 | $10 |
2014: 10 drugs
| Clopidogrel | 19 | $971 | $51 |
| Pravastatin | 16 | $779 | $49 |
| Atorvastatin | 17 | $661 | $39 |
| Metoprolol | 59 | $568 | $10 |
| Warfarin | 41 | $512 | $12 |
| Amiodarone | 15 | $467 | $31 |
| Lisinopril | 39 | $441 | $11 |
| Losartan | 17 | $283 | $17 |
| Furosemide | 23 | $279 | $12 |
| Hydrocodone-Acetaminophen | 26 | $267 | $10 |
2013: 11 drugs
| Cefpodoxime Proxetil | 13 | $1,259 | $97 |
| Clopidogrel | 13 | $833 | $64 |
| Pravastatin | 13 | $727 | $56 |
| Amiodarone | 13 | $577 | $44 |
| Metoprolol | 56 | $525 | $9 |
| Losartan | 13 | $370 | $28 |
| Warfarin | 27 | $336 | $12 |
| Lisinopril | 28 | $313 | $11 |
| Hydrocodone-Acetaminophen | 19 | $216 | $11 |
| Furosemide | 17 | $184 | $11 |
| Atenolol | 11 | $112 | $10 |
Professional record
- NPI
- 1780750018
- Licence
- CA A93783California A93783: Current · expires 2027-09-30
- Trained
- University of California, San Diego School of Medicine, 2004 · 22 years ago
- Gender
- Male
More record details
- Sole proprietor
- No
- Taxonomy
- Internal medicine (207R00000X)
- Mailing address
- 2425 Geary Blvd, San Francisco, CA, 94115
- NPI first listed
- 2006-11-28
- NPI last updated
- 2021-12-09
This is when the NPI record was last certified, not a medical board exam.
This office lists an electronic records connection.