Kirsten A Regalia, MD
Internal Medicine · Antioch
- 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
- 16 years
- Graduated 2010
Offices
1 location · Permanente Medical Group Inc · 10,928 clinicians in this group
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. Regalia’s office at (925) 813-6500 to ask if they take your plan before you enroll.
California Medical Board record
Licence A125295 · Current
Licensed to practise in California · since 2013 · expires 2028-06-30 · Georgetown University School of Medicine.
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 |
Procedures year by year
| Procedure | 2016 | 2017 | 2018 | 2019 |
|---|---|---|---|---|
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 12 | 34 | 29 | – |
| Biopsy of large bowel using a flexible endoscope | 11 | 20 | 16 | – |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | – | 11 | 11 | – |
| Diagnostic exam of large bowel using a flexible endoscope | – | 12 | – | – |
Times billed to Original Medicare each year. A blank year means fewer than 11 people had it, or none: Medicare does not publish smaller counts. Medicare Advantage patients are not included.
Year by year
| 2019 | 35 | 49 | 70 | 1.65 | $45,981 | $3,873 |
| 2018 | 219 | 426 | 68 | 2.13 | $356,252 | $39,856 |
| 2017 | 229 | 456 | 67 | 1.81 | $345,484 | $39,305 |
| 2016 | 123 | 232 | 70 | 1.93 | $203,222 | $27,299 |
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
2018: 14 services
| New patient visit (60+ min) | 30 | $4,042 | $135 |
| Long return visit (40+ min) | 35 | $3,292 | $91 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 29 | $2,612 | $90 |
| New patient visit (60+ min) | 17 | $2,533 | $149 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 11 | $2,237 | $203 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 12 | $2,183 | $182 |
| Biopsy of large bowel using a flexible endoscope | 16 | $1,974 | $123 |
| Long return visit (40+ min) | 16 | $1,678 | $99 |
| Study of esophagus to assess movement | 21 | $1,156 | $55 |
| Return visit (30+ min) | 17 | $1,083 | $60 |
| New patient visit (45+ min) | 11 | $1,051 | $96 |
| Return visit (30+ min) | 11 | $683 | $62 |
| Study of esophagus to assess movement | 11 | $664 | $60 |
| Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito | 34 | $158 | $5 |
2017: 13 services
| New patient visit (60+ min) | 54 | $7,485 | $139 |
| Long return visit (40+ min) | 63 | $7,472 | $95 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 34 | $3,426 | $101 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 11 | $2,574 | $234 |
| Biopsy of large bowel using a flexible endoscope | 20 | $2,509 | $125 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 12 | $2,175 | $181 |
| Study of esophagus to assess movement | 31 | $1,889 | $61 |
| Diagnostic exam of large bowel using a flexible endoscope | 12 | $1,549 | $129 |
| Return visit (30+ min) | 11 | $917 | $71 |
| Monitoring and recording of esophageal function through nasal tube | 15 | $644 | $43 |
| Monitoring and recording of esophageal function through nasal tube with electrode | 13 | $600 | $46 |
| Measurement of hydrogen in breath to test for stomach and bowel symptoms | 27 | $250 | $9 |
| Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito | 46 | $216 | $5 |
2016: 7 services
| Long return visit (40+ min) | 32 | $3,828 | $98 |
| New patient visit (60+ min) | 26 | $3,763 | $145 |
| Subsequent hospital care with moderate levelof medical decision making at least 50 minutes | 17 | $3,055 | $93 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 11 | $1,983 | $180 |
| Initial hospital care with straightforward or low-level medical decision making at least 55 minutes | 12 | $1,579 | $121 |
| Biopsy of large bowel using a flexible endoscope | 11 | $1,561 | $142 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 12 | $1,263 | $105 |
Medicaid work
$459 in 2018
Medicaid paid $459 for 27 billed services this clinician did in 2018, up to 14 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.
| TISSUE EXAM BY PATHOLOGIST | 14 | $408 |
| Injection, midazolam hydrochloride, per 1 mg | 13 | $52 |
| 2018 | 27 | 2 | 14 | $459 |
Drugs they prescribed that Part D paid
$406,784
Pharmacies billed $406,784 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 615) in 2024. At or below the middle of the specialty; the typical internal medicine clinician is at 1%.
497 generic and 118 brand-name prescriptions · $406,784 in drug cost · 23 antibiotic prescriptions to 16 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.
| Stelara | 11 | $188,024 | $17,093 |
| Zenpep | 12 | $55,469 | $4,622 |
| Xifaxan | 14 | $34,425 | $2,459 |
| Motegrity | 28 | $25,419 | $908 |
| Linzess | 15 | $19,545 | $1,303 |
See all 18 drugs
| Stelara | 11 | $188,024 | $17,093 |
| Zenpep | 12 | $55,469 | $4,622 |
| Xifaxan | 14 | $34,425 | $2,459 |
| Motegrity | 28 | $25,419 | $908 |
| Linzess | 15 | $19,545 | $1,303 |
| Mesalamine | 20 | $8,181 | $409 |
| Gavilyte-C | 234 | $5,493 | $23 |
| Colestipol | 16 | $4,516 | $282 |
| Lubiprostone | 18 | $2,113 | $117 |
| Lactulose | 12 | $782 | $65 |
| Omeprazole | 50 | $684 | $14 |
| Sucralfate | 12 | $501 | $42 |
| Azathioprine | 22 | $351 | $16 |
| Famotidine | 18 | $201 | $11 |
| Pantoprazole | 16 | $190 | $12 |
| Dicyclomine | 15 | $158 | $11 |
| Carvedilol | 17 | $138 | $8 |
| Furosemide | 12 | $107 | $9 |
Year by year
| 2024 | 615 | 295 | 0% (0) | 19% | $406,784 |
| 2023 | 677 | 413 | 0% (0) | 18% | $355,396 |
| 2022 | 620 | 398 | 0% (0) | 27% | $241,078 |
| 2021 | 457 | 291 | 0% (0) | None | $74,246 |
| 2020 | 342 | 185 | 0% (0) | 30% | $43,965 |
| 2019 | 375 | 229 | 0% (0) | 21% | $64,572 |
| 2018 | 269 | 98 | 0% (0) | 34% | $58,417 |
| 2017 | 234 | 90 | 0% (0) | 31% | $46,025 |
| 2016 | 75 | 48 | 0% (0) | 41% | $12,763 |
| 2014 | 11 | None | 0% (0) | 100% | $12,701 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 12 drugs
| Stelara | 12 | $195,455 | $16,288 |
| Zenpep | 14 | $55,557 | $3,968 |
| Linzess | 24 | $23,217 | $967 |
| Motegrity | 22 | $16,810 | $764 |
| Mesalamine | 15 | $7,945 | $530 |
| Gavilyte-C | 357 | $7,329 | $21 |
| Colestipol | 16 | $5,372 | $336 |
| Lialda | 17 | $4,320 | $254 |
| Omeprazole | 29 | $417 | $14 |
| Azathioprine | 22 | $346 | $16 |
| Famotidine | 14 | $175 | $13 |
| Methotrexate | 15 | $163 | $11 |
2022: 11 drugs
| Zenpep | 21 | $68,233 | $3,249 |
| Linzess | 24 | $23,251 | $969 |
| Motegrity | 19 | $14,528 | $765 |
| Gavilyte-C | 284 | $4,912 | $17 |
| Colestipol | 12 | $4,265 | $355 |
| Lialda | 14 | $3,603 | $257 |
| Peg-3350 and Electrolytes | 48 | $936 | $20 |
| Omeprazole | 42 | $542 | $13 |
| Azathioprine | 16 | $250 | $16 |
| Famotidine | 16 | $192 | $12 |
| Pantoprazole | 12 | $105 | $9 |
2021: 11 drugs
| Linzess | 12 | $17,448 | $1,454 |
| Motegrity | 12 | $7,271 | $606 |
| Lialda | 16 | $5,829 | $364 |
| Colestipol | 13 | $2,422 | $186 |
| Peg-3350 and Electrolytes | 108 | $2,210 | $20 |
| Peg3350-Sod Sul-Nacl-Kcl-Asb-C | 28 | $1,957 | $70 |
| Gavilyte-C | 83 | $1,245 | $15 |
| Omeprazole | 27 | $384 | $14 |
| Peg 3350-Electrolyte | 13 | $334 | $26 |
| Famotidine | 18 | $191 | $11 |
| Allopurinol | 12 | $96 | $8 |
2020: 9 drugs
| Linzess | 16 | $14,755 | $922 |
| Amitiza | 11 | $5,766 | $524 |
| Mesalamine | 18 | $5,285 | $294 |
| Colestipol | 24 | $4,508 | $188 |
| Gavilyte-C | 73 | $1,463 | $20 |
| Peg-3350 and Electrolytes | 28 | $602 | $22 |
| Omeprazole | 31 | $440 | $14 |
| Pantoprazole | 25 | $302 | $12 |
| Gavilyte-G | 11 | $244 | $22 |
2019: 6 drugs
| Xifaxan | 11 | $15,747 | $1,432 |
| Linzess | 13 | $8,296 | $638 |
| Gavilyte-C | 152 | $5,356 | $35 |
| Omeprazole | 29 | $394 | $14 |
| Mirtazapine | 16 | $340 | $21 |
| Pantoprazole | 21 | $282 | $13 |
2018: 5 drugs
| Linzess | 13 | $7,390 | $568 |
| Mirtazapine | 28 | $391 | $14 |
| Omeprazole | 18 | $327 | $18 |
| Amitriptyline | 15 | $181 | $12 |
| Buspirone | 14 | $115 | $8 |
2017: 7 drugs
| Delzicol | 11 | $13,059 | $1,187 |
| Linzess | 15 | $6,733 | $449 |
| Amitriptyline | 26 | $233 | $9 |
| Mirtazapine | 15 | $204 | $14 |
| Polyethylene Glycol 3350 | 15 | $195 | $13 |
| Omeprazole | 11 | $180 | $16 |
| Ranitidine | 18 | $127 | $7 |
2016: 1 drug
| Peg 3350-Electrolyte | 12 | $193 | $16 |
Money from drug and device companies
$14 in 2023
A payment is not proof that care is biased.
| Boston Scientific | None | $14 | 1 payment
|
See the published payment
| Boston Scientific | Meals · 2023-10-10 | None | $14 |
Professional record
- NPI
- 1710201215
- Licence
- CA A125295California A125295: Current · expires 2028-06-30
- Gender
- Female
More record details
- Sole proprietor
- No
- Taxonomy
- Internal medicine (207R00000X); Federal specialty code 207RG0100X (207RG0100X)
- Mailing address
- 300 Pasteur Dr, Stanford, CA, 94305
- NPI first listed
- 2010-03-26
- NPI last updated
- 2021-12-22
This is when the NPI record was last certified, not a medical board exam.
This office lists an electronic records connection.