Tiffany Wen-An Guo, MD
Internal Medicine · San Jose
- 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
Offices
1 location
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. Guo’s office at (888) 334-1000 to ask if they take your plan before you enroll.
California Medical Board record
Licence A157135 · Current
Licensed to practise in California · since 2018 · expires 2028-07-31 · Columbia University College of Physicians and Surgeons.
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
Original Medicare doctor bills
$12,232
Medicare paid this office $12,232 for 55 people.
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
| Residence visit for established patient with high level of medical decision making, per day at least 60 minutes | 27 | $5,855 | $139 |
| Residence visit for new patient with high level of medical decision making, per day at least 75 minutes | 24 | $3,763 | $157 |
| Residence visit for established patient with moderate level of medical decision making, per day at least 40 minutes | 16 | $2,318 | $97 |
Who their Medicare patients are
55 Original Medicare patients in 2024. Average age 79 · 85 and older 24% · Women 62% · Health risk score 2.10. 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 45% · Heart failure 42% · Chronic kidney disease 42% · Depression 40% · COPD 33% · Atrial fibrillation 31% · Diabetes 29% · Dementia 20%.
The office billed $21,819, Medicare allowed $16,482 and paid $12,232; for 93 services of 5 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 | 55 | 93 | 79 | 2.10 | $21,819 | $12,232 |
| 2023 | 84 | 125 | 80 | 2.14 | $30,051 | $18,174 |
| 2022 | 38 | 52 | 82 | 2.28 | $13,740 | $8,070 |
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: 3 services
| Residence visit for established patient with high level of medical decision making, per day at least 60 minutes | 46 | $9,558 | $154 |
| Residence visit for new patient with high level of medical decision making, per day at least 75 minutes | 33 | $5,532 | $168 |
| Residence visit for established patient with moderate level of medical decision making, per day at least 40 minutes | 15 | $2,011 | $106 |
2022: 2 services
| Residence visit for established patient with high level of medical decision making, per day at least 60 minutes | 22 | $3,979 | $147 |
| Residence visit for new patient with high level of medical decision making, per day at least 75 minutes | 21 | $3,804 | $181 |
Drugs they prescribed that Part D paid
$15,253
Pharmacies billed $15,253 in 2024.
This is pharmacy cost, not the office bill, and not what patients paid.
Opioids were 0% of their Part D prescriptions (0 of 131) in 2024. At or below the middle of the specialty; the typical internal medicine clinician is at 1%.
104 generic and 27 brand-name prescriptions · $15,253 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.
| Alprazolam | 13 | $78 | $6 |
| Mirtazapine | 12 | $72 | $6 |
Year by year
| 2024 | 131 | 25 | 0% (0) | 21% | $15,253 |
| 2023 | 69 | 30 | None | None | $6,610 |
| 2022 | 22 | None | None | None | $595 |
| 2020 | 105 | 23 | None | None | $7,982 |
| 2019 | 109 | 18 | None | None | $9,238 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2020: 1 drug
| Allopurinol | 14 | $166 | $12 |
Money from drug and device companies
$18 in 2023
A payment is not proof that care is biased.
| Janssen Biotech | Erleada | $18 | 1 payment
|
See the published payment
| Janssen Biotech | Meals · 2023-08-03 | Erleada | $18 |
Professional record
- NPI
- 1922549286
- Licence
- CA A157135California A157135: Current · expires 2028-07-31
More record details
- Sole proprietor
- Yes
- Taxonomy
- Internal medicine (207R00000X)
- Mailing address
- 20488 Stevens Creek Blvd Apt 1105, Cupertino, CA, 95014
- NPI first listed
- 2017-03-19
- NPI last updated
- 2020-07-13
- NPI record certified
- 2020-07-13
This is when the NPI record was last certified, not a medical board exam.