J Clin Gastroenterol
Cholangiopancreatography, Endoscopic RetrogradeCystic FibrosisInpatients
Dr. Nayna Devi Riyat, MD
NPI1508122656PAC ID9830491307
- Medicare services, 2022
- 317
- Part D claims, 2024
- 162
- Publications
- 1
- Hospital affiliations
- 1
- Industry payments
- $7,050
- Practice address
- 7373 West Ln, Stockton, CA 95210
- Practice phone
- Call (209) 476-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Permanente Medical Group Inc
Stockton, California
Find Dr. Riyat's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Nayna Devi Riyat is a gastroenterologist in Stockton, California
Dr. Riyat practices at Permanente Medical Group Inc in Stockton, California.
Dr. Riyat's NPI, 1508122656, was assigned on April 3, 2012. Dr. Riyat graduated from Rush Medical College of Rush University in 2012. Dr. Riyat holds California license A181985.
NPI and contact details
- NPI
- 1508122656NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9830491307
- NPI enumeration date
- April 3, 2012
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (209) 476-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 40
- Medical school graduation
- 2012
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Nayna Devi Riyat practices at Permanente Medical Group Inc in Stockton, California
Dr. Riyat's primary practice is Permanente Medical Group Inc, at 7373 West Ln, Stockton, CA 95210 in San Joaquin County. The practice phone is (209) 476-2000.
- Permanente Medical Group Inc7373 West Ln, Stockton, CA 95210 · San Joaquin CountyPhone(209) 476-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Nayna Devi Riyat is affiliated with 2 sites of care and 1 medical group
Dr. Riyat's primary practice is Permanente Medical Group Inc in Stockton, California. Dr. Riyat is also affiliated with Stanford Hospital at 300 Pasteur Drive. The medical group on file is The Permanente Medical Group, Inc.
Permanente Medical Group IncPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Nayna Devi Riyat's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Riyat practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Permanente Medical Group Inc | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Nayna Devi Riyat is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Riyat's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dr. Riyat is licensed in California.
Specialties and state licenses
- Gastroenterology, CaliforniaPrimary
Gastroenterologists near Dr. Riyat
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Nayna Devi Riyat billed Medicare for 317 services in 2022
CMS data shows 317 Medicare services from Dr. Riyat across 9 procedure codes in 2022. Medicare paid $25,323 for them.
Medicare services, 2022317
Paid by Medicare$25,323
Procedure codes9
Dr. Riyat's Medicare services by type, 2021 to 2022
- 2021
- 2022
- Surgery
- 2021: 1092022: 13120%
- Other services
- 2021: 1182022: 1191%
- Office and hospital visits
- 2021: 1312022: 6749%
Where Dr. Riyat's Medicare services took place, 2022
- In an office12640%
- In a facility19160%
Dr. Riyat compared with the California median for gastroenterologists, 2022
- Dr. Riyat
- California median
- Medicare services
- 317vs 58646% below
- Part D claims
- 115vs 38070% below
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Riyat's most billed Medicare procedure codes, 2022
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Riyat and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Nayna Devi Riyat's patients have a median age of 56
Across all payers, Dmand AI patient panel data puts Dr. Riyat's median patient age at 56, with 60% women.
Dr. Riyat's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women60%
- Men40%
Source: Dmand AI Patient Panel Data
Dr. Nayna Devi Riyat wrote 162 Medicare Part D claims in 2024
In 2024, Dr. Riyat wrote 162 Medicare Part D claims for 111 patients. 93% of them were for generic drugs. CMS names the drug for 115 of them, across 3 drugs with 11 or more claims each, at $2,164 in total drug cost. In 2023, CMS named 14 claims across 1 drug.
Part D claims, 2024162
Drugs named by CMS3
Total drug cost$2,164
Part D patients111
Dr. Riyat's Part D claims by kind of drug, 2024
- Generic151 claims93%
- Brand-name11 claims7%
Dr. Riyat's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Riyat's Part D claims, 2024
- Antibiotics9%15 of 162 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 142024: 115721%
Drugs named by CMS: 3 in 2024, 1 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Dr. Nayna Devi Riyat takes part in Medicare
Dr. Riyat accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Colonoscopy: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Nayna Devi Riyat has 1 publication on record
Dmand AI links 1 paper to Dr. Riyat in 2025. Dr. Riyat's most frequent co-authors are Monique Theresa Barakat, MD, PhD, Saurabh Chandan, MD and Salman Haider, MD.
Papers1
Dr. Riyat's most frequent co-authors
- Monique Theresa Barakat, MD, PhD1 shared paper
- Saurabh Chandan, MD1 shared paper
- Salman Haider, MD1 shared paper
Recent publications by Dr. Riyat
See who Dr. Riyat researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Riyat works with, so you can find a warm path to the right gastroenterologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Nayna Devi Riyat received $7,050 in industry payments from 2022 to 2025
CMS Open Payments shows 47 general payments to Dr. Riyat from 3 drug and device companies from 2022 to 2025. Travel and lodging make up the largest share, 93% of the total. Olympus Corporation of the Americas paid the most, $5,564.
General payments to Dr. Riyat by program year, 2022 to 2025
General payments to Dr. Riyat by kind, 2022 to 2025
$7Kin total
- Travel and lodging$6,52693%
- Food and beverage$5247%
Companies that paid Dr. Riyat the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Nayna Devi Riyat graduated from Rush Medical College of Rush University
Dr. Riyat graduated from Rush Medical College of Rush University in 2012.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Nayna Devi Riyat's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Nayna Devi Riyat
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Nayna Devi Riyat's NPI number?
Dr. Nayna Devi Riyat's NPI number is 1508122656. It was assigned on April 3, 2012, and it is active in the NPI Registry.
What kind of doctor is Dr. Nayna Devi Riyat?
Dr. Nayna Devi Riyat is a gastroenterologist in Stockton, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Nayna Devi Riyat practice?
Dr. Riyat practices at 7373 West Ln, Stockton, CA 95210. Dr. Riyat's primary practice is Permanente Medical Group Inc in Stockton, California.
What is Dr. Nayna Devi Riyat's office phone number?
The practice phone on file for Dr. Riyat is (209) 476-2000.
What is Dr. Nayna Devi Riyat's medical license number?
Dr. Riyat holds California license A181985.
Which hospitals is Dr. Nayna Devi Riyat affiliated with?
Dr. Riyat is affiliated with Stanford Hospital at 300 Pasteur Drive.
What medical group is Dr. Nayna Devi Riyat part of?
Dr. Riyat is linked to The Permanente Medical Group, Inc.
Does Dr. Nayna Devi Riyat accept Medicare?
Yes. CMS data shows Dr. Riyat billed Medicare for 317 services in 2022, and Dr. Riyat accepts Medicare assignment.
What services does Dr. Nayna Devi Riyat bill to Medicare?
In 2022, Dr. Riyat's most billed Medicare services were medicare service (G0500), surgery: digestive system (45385) and surgery: digestive system (43239).
Where did Dr. Nayna Devi Riyat go to medical school?
Dr. Riyat graduated from Rush Medical College of Rush University in 2012.
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What drugs does Dr. Nayna Devi Riyat prescribe most?
In 2024 Medicare Part D data, Dr. Riyat's most prescribed drugs by claims were Gavilyte-C, Omeprazole and Pantoprazole Sodium.
Has Dr. Nayna Devi Riyat received payments from drug or device companies?
CMS Open Payments shows $7,050 in general payments to Dr. Riyat from 3 companies from 2022 to 2025. The largest total came from Olympus Corporation of the Americas.
How long has Dr. Nayna Devi Riyat been practicing?
Dr. Riyat graduated from medical school in 2012, 14 years ago.
Does Dr. Nayna Devi Riyat do research?
Dmand AI links 1 publication to Dr. Riyat.
Who does Dr. Nayna Devi Riyat publish with?
Dr. Riyat's most frequent co-authors are Monique Theresa Barakat, MD, PhD (1 shared paper), Saurabh Chandan, MD (1 shared paper) and Salman Haider, MD (1 shared paper).
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