Nayna Riyat, MD
Gastroenterology · Modesto
- 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 · Permanente Medical Group Inc · 10,928 clinicians in this group
Looking this up.
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. Riyat’s office at (209) 735-5000 to ask if they take your plan before you enroll.
California Medical Board record
Licence A181985 · Current
Licensed to practise in California · since 2022 · expires 2028-11-30 · Paul L. Foster School of Medicine Texas Tech University Health Sciences Center.
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 |
Year by year
| 2022 | 227 | 419 | 70 | 1.52 | $554,958 | $34,661 |
| 2021 | 258 | 482 | 68 | 1.53 | $533,468 | $41,429 |
| 2020 | 26 | 35 | 62 | 1.50 | $31,267 | $3,036 |
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
2022: 11 services
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 39 | $6,924 | $178 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 21 | $3,986 | $190 |
| New patient visit (60+ min) | 25 | $3,153 | $126 |
| Long return visit (40+ min) | 30 | $2,953 | $95 |
| Biopsy of large bowel using a flexible endoscope | 26 | $2,428 | $93 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 31 | $2,280 | $74 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 11 | $1,646 | $150 |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 14 | $1,234 | $88 |
| Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or | 11 | $288 | $24 |
| 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 | 69 | $277 | $4 |
| 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 | 37 | $153 | $4 |
2021: 12 services
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 30 | $5,505 | $183 |
| Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 27 | $5,017 | $186 |
| Long return visit (40+ min) | 34 | $4,277 | $107 |
| New patient visit (60+ min) | 38 | $4,131 | $109 |
| Initial hospital care with moderate level of medical decision making at least 75 minutes | 22 | $3,231 | $147 |
| New patient visit (60+ min) | 17 | $2,156 | $127 |
| Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 25 | $1,685 | $67 |
| Long return visit (40+ min) | 14 | $1,453 | $104 |
| Biopsy of large bowel using a flexible endoscope | 12 | $1,262 | $105 |
| Diagnostic exam of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 15 | $1,156 | $77 |
| 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 | 63 | $263 | $4 |
| 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 | 53 | $225 | $4 |
Medicaid work
$145 in 2022
Medicaid paid $145 for 82 billed services this clinician did in 2022, up to 17 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.
| Moderate sedation services provided by the same physician or other qualified health care professional performing the diagnostic or therapeutic service that the sedation supports, requiring the presence of an independent trained observer to assist in the monitoring of the patient's level of consciousness and physiological status; initial 15 minutes of intraservice time, patient age 5 years or older | 30 | $126 |
| Injection, midazolam hydrochloride, per 1 mg | 20 | $16 |
| Fentanyl citrate injection | 19 | $4 |
| TISSUE EXAM BY PATHOLOGIST | 13 | $0 |
| 2022 | 82 | 4 | 17 | $145 |
| 2021 | 64 | 1 | 18 | $5,244 |
See the largest Medicaid services in earlier years
2021
| Hospital outpatient clinic visit for assessment and management of a patient | 64 | $5,244 |
Drugs they prescribed that Part D paid
$11,425
Pharmacies billed $11,425 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 162) in 2024. At or below the middle of the specialty; the typical gastroenterology clinician is at 0%.
151 generic and 11 brand-name prescriptions · $11,425 in drug cost · 15 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.
| Gavilyte-C | 81 | $1,796 | $22 |
| Omeprazole | 23 | $258 | $11 |
| Pantoprazole | 11 | $110 | $10 |
Year by year
| 2024 | 162 | 111 | 0% (0) | 7% | $11,425 |
| 2023 | 41 | 17 | 0% (0) | 27% | $6,296 |
| 2022 | 194 | 60 | 0% (0) | 22% | $18,858 |
| 2021 | 191 | 73 | 0% (0) | 18% | $28,552 |
| 2020 | 14 | None | 0% (0) | None | $6,107 |
| 2019 | 34 | 12 | 0% (0) | 38% | $10,239 |
| 2018 | 47 | 18 | 0% (0) | None | $3,802 |
| 2017 | 51 | 19 | 0% (0) | None | $7,401 |
| 2016 | 55 | 18 | None | 22% | $3,122 |
| 2015 | 50 | 15 | 0% (0) | None | $2,129 |
| 2014 | 26 | None | 0% (0) | None | $2,857 |
Part D prescriptions only. A drug prescribed to fewer than 11 people in a year is hidden.
See the drugs prescribed each year
2023: 1 drug
| Pantoprazole | 14 | $60 | $4 |
2022: 7 drugs
| Linzess | 18 | $8,842 | $491 |
| Trulance | 11 | $5,958 | $542 |
| Pantoprazole | 48 | $651 | $14 |
| Dicyclomine | 18 | $642 | $36 |
| Omeprazole | 35 | $512 | $15 |
| Peg 3350-Electrolyte | 18 | $346 | $19 |
| Buspirone | 15 | $124 | $8 |
2021: 6 drugs
| Linzess | 21 | $17,685 | $842 |
| Dicyclomine | 26 | $1,271 | $49 |
| Omeprazole | 33 | $658 | $20 |
| Pantoprazole | 36 | $625 | $17 |
| Peg 3350-Electrolyte | 20 | $363 | $18 |
| Buspirone | 12 | $96 | $8 |
2018: 1 drug
| Pantoprazole | 15 | $126 | $8 |
2017: 1 drug
| Pantoprazole | 13 | $193 | $15 |
Money from drug and device companies
$672 in 2025
| 2025 | 1 | 7 | None | $672 |
| 2024 | 1 | 25 | None | $4,615 |
| 2023 | 2 | 10 | None | $1,189 |
| 2022 | 2 | 5 | None | $574 |
Paid work is consulting, speaking, honoraria and royalties, as opposed to meals and travel.
A payment is not proof that care is biased.
| Boston Scientific | Resolution 360 Ultra Clip | $672 | 7 payments
|
See all 7 published payments
| Boston Scientific | Meals · 2025-11-24 | Spyglass | $17 |
| Boston Scientific | Meals · 2025-11-03 | Spyglass | $22 |
| Boston Scientific | Meals · 2025-10-16 | Resolution 360 Ultra Clip | $63 |
| Boston Scientific | Travel · 2025-10-16 | Resolution 360 Ultra Clip | $311 |
| Boston Scientific | Travel · 2025-10-16 | Resolution 360 Ultra Clip | $232 |
| Boston Scientific | Meals · 2025-07-18 | Spyglass | $15 |
| Boston Scientific | Meals · 2025-07-07 | Spyglass | $13 |
See earlier years (2024, 2023, 2022)
2024: $4,615
| Olympus Corporation of the Americas | Single Use Electrosurgical Knife Kd-655 | $4,615 | 25 payments
|
2023: $1,189
| Olympus Corporation of the Americas | Single Use Electrosurgical Knife Kd-655 | $949 | 8 payments
|
| Boston Scientific | None | $240 | 2 payments
|
2022: $574
| Boston Scientific | Acquire | $558 | 4 payments
|
| Apollo Endosurgery US | Overstitch Endoscopic Suturing System | $17 | 1 payment
|
Professional record
- NPI
- 1508122656
- Licence
- CA A181985California A181985: Current · expires 2028-11-30
- Trained
- Rush Medical College of Rush University, 2012
- Gender
- Female
More record details
- Sole proprietor
- No
- Taxonomy
- Federal specialty code 207RG0100X (207RG0100X); Internal medicine (207R00000X)
- Mailing address
- 300 Pasteur Dr, Stanford, CA, 94305
- NPI first listed
- 2012-04-03
- NPI last updated
- 2022-09-26
- NPI record certified
- 2022-09-26
This is when the NPI record was last certified, not a medical board exam.
Extra NPI addresses: 105 E 9th St, Coralville, IA, 52241 · 200 Hawkins Dr, Iowa City, IA, 52242