Derrick Siao, MD
Gastroenterology · Santa Clara
- Medicare standing
- Clear
- Enrolled, allowed to bill and order, not excluded
- Plans that list them
- 4
- 1 carrier
- Office
- 1
Offices
1 location · Permanente Medical Group Inc · 10,928 clinicians in this group
Plans that list them
4 plans · 1 carrier
A missing listing does not mean out of network. Directories change, and a listing does not cover every office. Call Dr. Siao’s office at (408) 851-1000 to confirm they take your plan. Ask about the office you use, its medical group, referrals and appointments.
| Kaiser Permanente Dual Complete North P2 (HMO D-SNP) | Kaiser Permanente | Listed | Sep 1, 2026 |
| Kaiser Permanente Dual Complete North P23 (HMO D-SNP) | Kaiser Permanente | Listed | Sep 1, 2026 |
| Kaiser Permanente Sr Adv Basic Santa Clara (HMO) | Kaiser Permanente | Listed | Sep 1, 2026 |
| Kaiser Permanente Sr Adv Enhanced Santa Clara (HMO) | Kaiser Permanente | Listed | Sep 1, 2026 |
California Medical Board record
Licence A110506 · Current
Licensed to practise in California · since 2009 · expires 2027-06-30 · University of Michigan Medical School.
No disciplinary actions, convictions, malpractice judgments or citations in this record.
Original Medicare doctor bills
This is what Medicare paid the clinician — not Medicare Advantage, and not the pharmacy.
Procedures Medicare counted
| Colonoscopy | 1-10 | None |
| Upper gastrointestinal (GI) endoscopy for acid reflux | 1-10 | None |
Drugs they prescribed that Part D paid
$158,429
Pharmacies billed $158,429 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 775) in 2024. At or below the middle of the specialty; the typical gastroenterology clinician is at 0%.
630 generic and 145 brand-name prescriptions · $158,429 in drug cost · 18 antibiotic prescriptions.
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.
| Creon | 22 | $64,274 | $2,922 |
| Mesalamine | 51 | $21,492 | $421 |
| Trulance | 27 | $15,966 | $591 |
| Amjevita(Cf) | 11 | $10,713 | $974 |
| Motegrity | 12 | $9,392 | $783 |
See all 12 drugs
| Creon | 22 | $64,274 | $2,922 |
| Mesalamine | 51 | $21,492 | $421 |
| Trulance | 27 | $15,966 | $591 |
| Amjevita(Cf) | 11 | $10,713 | $974 |
| Motegrity | 12 | $9,392 | $783 |
| Budesonide Dr | 72 | $5,838 | $81 |
| Gavilyte-C | 242 | $5,511 | $23 |
| Lubiprostone | 53 | $4,592 | $87 |
| Ursodiol | 11 | $1,801 | $164 |
| Pantoprazole | 128 | $1,366 | $11 |
| Cholestyramine | 31 | $1,300 | $42 |
| Omeprazole | 15 | $159 | $11 |
Year by year
| 2024 | 775 | 392 | 0% (0) | 19% | $158,429 |
| 2023 | 782 | 423 | 0% (0) | 18% | $155,155 |
| 2022 | 573 | 326 | 0% (0) | 34% | $157,559 |
| 2021 | 486 | 316 | 0% (0) | 24% | $95,499 |
| 2020 | 399 | 218 | 0% (0) | None | $106,035 |
| 2019 | 459 | 301 | 0% (0) | 15% | $113,282 |
| 2018 | 427 | 311 | None | 41% | $119,889 |
| 2017 | 366 | 258 | 0% (0) | 20% | $146,986 |
| 2016 | 450 | 315 | None | 16% | $107,512 |
| 2015 | 385 | 296 | 0% (0) | 8% | $52,707 |
| 2014 | 72 | 57 | None | 38% | $6,642 |
| 2013 | 13 | None | 0% (0) | None | $1,547 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 13 drugs
| Creon | 25 | $56,467 | $2,259 |
| Lialda | 28 | $16,082 | $574 |
| Lubiprostone | 55 | $8,579 | $156 |
| Trulance | 11 | $6,729 | $612 |
| Motegrity | 11 | $6,200 | $564 |
| Gavilyte-C | 279 | $6,121 | $22 |
| Budesonide Dr | 39 | $3,563 | $91 |
| Mesalamine | 14 | $3,219 | $230 |
| Ursodiol | 12 | $2,010 | $168 |
| Pantoprazole | 140 | $1,593 | $11 |
| Cholestyramine | 33 | $1,364 | $41 |
| Peg-3350 and Electrolytes | 12 | $307 | $26 |
| Omeprazole | 16 | $192 | $12 |
2022: 13 drugs
| Humira | 12 | $53,369 | $4,447 |
| Creon | 11 | $26,290 | $2,390 |
| Lialda | 34 | $15,199 | $447 |
| Linzess | 17 | $9,355 | $550 |
| Lubiprostone | 29 | $8,833 | $305 |
| Motegrity | 14 | $7,562 | $540 |
| Gavilyte-C | 150 | $2,683 | $18 |
| Pantoprazole | 101 | $1,224 | $12 |
| Budesonide Ec | 12 | $1,211 | $101 |
| Cholestyramine | 16 | $1,209 | $76 |
| Budesonide Dr | 15 | $1,150 | $77 |
| Peg-3350 and Electrolytes | 50 | $980 | $20 |
| Omeprazole | 16 | $243 | $15 |
2021: 9 drugs
| Humira | 11 | $46,403 | $4,218 |
| Mesalamine | 16 | $3,876 | $242 |
| Budesonide Ec | 23 | $2,527 | $110 |
| Peg-3350 and Electrolytes | 87 | $1,793 | $21 |
| Gavilyte-C | 110 | $1,700 | $15 |
| Cholestyramine | 20 | $1,423 | $71 |
| Peg 3350-Electrolyte | 37 | $999 | $27 |
| Peg3350-Sod Sul-Nacl-Kcl-Asb-C | 12 | $902 | $75 |
| Pantoprazole | 62 | $872 | $14 |
2020: 7 drugs
| Humira | 14 | $57,918 | $4,137 |
| Mesalamine | 23 | $6,872 | $299 |
| Budesonide Ec | 27 | $3,345 | $124 |
| Gavilyte-C | 97 | $1,938 | $20 |
| Pantoprazole | 71 | $926 | $13 |
| Cholestyramine | 14 | $761 | $54 |
| Peg-3350 and Electrolytes | 18 | $391 | $22 |
2019: 6 drugs
| Humira | 13 | $52,529 | $4,041 |
| Mesalamine | 15 | $8,272 | $551 |
| Gavilyte-C | 220 | $7,910 | $36 |
| Budesonide Ec | 24 | $3,462 | $144 |
| Pantoprazole | 82 | $1,329 | $16 |
| Dilt-Xr | 11 | $349 | $32 |
2018: 5 drugs
| Humira | 13 | $51,051 | $3,927 |
| Canasa | 12 | $12,697 | $1,058 |
| Gavilyte-C | 147 | $5,353 | $36 |
| Peg 3350-Electrolyte | 106 | $3,931 | $37 |
| Pantoprazole | 55 | $1,548 | $28 |
2017: 5 drugs
| Humira | 13 | $48,031 | $3,695 |
| Lialda | 18 | $13,799 | $767 |
| Canasa | 11 | $10,640 | $967 |
| Gavilyte-C | 208 | $3,530 | $17 |
| Pantoprazole | 42 | $1,210 | $29 |
2016: 4 drugs
| Humira | 12 | $40,215 | $3,351 |
| Linzess | 17 | $6,824 | $401 |
| Gavilyte-C | 264 | $4,488 | $17 |
| Pantoprazole | 67 | $2,528 | $38 |
2015: 4 drugs
| Xifaxan | 12 | $16,344 | $1,362 |
| Gavilyte-C | 250 | $4,242 | $17 |
| Pantoprazole | 59 | $2,258 | $38 |
| Cholestyramine | 20 | $1,386 | $69 |
2014: 3 drugs
| Pantoprazole | 14 | $484 | $35 |
| Peg 3350-Electrolyte | 20 | $340 | $17 |
| Gavilyte-C | 13 | $221 | $17 |
Professional record
- NPI
- 1073849261
- Licence
- CA A110506California A110506: Current · expires 2027-06-30
- Trained
- University of Michigan Medical School, 2008
- Gender
- Male
More record details
- Sole proprietor
- Yes
- Taxonomy
- Federal specialty code 207RG0100X (207RG0100X)
- Mailing address
- 710 Lawrence Expy, Dept 248, Santa Clara, CA, 95051
- NPI first listed
- 2009-10-23
- NPI last updated
- 2022-02-11
This is when the NPI record was last certified, not a medical board exam.
This office lists an electronic records connection.