Dr. Ronak Nimesh Desai, MD
- Medicare services, 2019
- 1,453
- Part D claims, 2024
- 7,720
- Hospital affiliations
- 1
- Industry payments
- $8,171
- Medical group
- 1
- Practice address
- 9961 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Desai's professional email, personal email and mobile number
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Dr. Ronak Nimesh Desai is an internist in Fontana, California
Dr. Desai practices at Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
Dr. Desai's NPI, 1154620987, was assigned on March 18, 2011. Dr. Desai graduated from American University of Antigua College of Medicine in 2010. Dr. Desai's South Carolina license number on file is 38904.
- NPI
- 1154620987NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3870736366
- NPI enumeration date
- March 18, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 427-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Ronak Nimesh Desai practices at Fontana Medical Center in Fontana, California
Dr. Desai's primary practice is Fontana Medical Center, at 9961 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-5000.
- Fontana Medical Center9961 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-5000
Source: Dmand AI Affiliation Data
Dr. Ronak Nimesh Desai is affiliated with 1 site of care and 1 medical group
Dr. Desai's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Ronak Nimesh Desai's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Desai practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fontana Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Ronak Nimesh Desai is one of 16,751 internists in California
Internal medicine is Dr. Desai's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Desai is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Desai's licenses on file in 4 states: South Carolina, California, New York and Virginia.
Specialties and state licenses
- Internal medicine, South CarolinaPrimary
- California license
- New York license
- Virginia license
Clinical focus
Dmand AI lists acid reflux and chronic obstructive pulmonary disease (COPD) among the conditions Dr. Desai treats.
Internists near Dr. Desai
Counts of internists 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. Ronak Nimesh Desai billed Medicare for 1,453 services in 2019
CMS data shows 1,453 Medicare services from Dr. Desai across 11 procedure codes in 2019. Medicare paid $67,741 for them. Every service was in an office.
Dr. Desai's Medicare services by type, 2018 to 2019
- 2018
- 2019
- Office and hospital visits
- 2018: 9722019: 74124%
- Surgery
- 2018: 4112019: 33718%
- Other services
- 2018: 3742019: 17952%
- Tests and treatments
- 2018: 2462019: 9163%
- Drugs given in the office
- 2018: 392019: 6054%
- Lab and pathology
- 2018: 402019: 4513%
Dr. Desai compared with the California median for internists, 2019
- Dr. Desai
- California median
- Medicare services
- 1,453vs 3614.0 times
- Part D claims
- 7,033vs 42116.7 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Desai's most billed Medicare procedure codes, 2019
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Desai?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Desai and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Ronak Nimesh Desai's patients have a median age of 52
Across all payers, Dmand AI patient panel data puts Dr. Desai's median patient age at 52, with 59% women.
Dr. Desai's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 52
Patient panel by sex, all payers
- Women59%
- Men40%
Source: Dmand AI Patient Panel Data
Dr. Ronak Nimesh Desai wrote 7,720 Medicare Part D claims in 2024
In 2024, Dr. Desai wrote 7,720 Medicare Part D claims for 1,230 patients. 88% of them were for generic drugs. CMS names the drug for 7,033 of them, across 119 drugs with 11 or more claims each, at $283,708 in total drug cost. In 2023, CMS named 6,388 claims across 119 drugs.
Dr. Desai's Part D claims by kind of drug, 2024
- Generic6,804 claims88%
- Brand-name793 claims10%
- Other123 claims2%
Dr. Desai'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. Desai's Part D claims, 2024
- Opioids4%287 of 7,720 claims
- Antibiotics2%180 of 7,720 claims
- Antipsychotics, patients 65 and over0%16 of 7,720 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: 6,3882024: 7,03310%
Drugs named by CMS: 119 in 2024, 119 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. Ronak Nimesh Desai takes part in Medicare
Dr. Desai accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Ronak Nimesh Desai received $8,171 in industry payments from 2016 to 2025
CMS Open Payments shows 482 general payments to Dr. Desai from 29 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Amgen Inc. paid the most, $1,862.
General payments to Dr. Desai by program year, 2016 to 2025
General payments to Dr. Desai by kind, 2016 to 2025
- Food and beverage$8,10199%
- Speaker and faculty fees$400%
- Education$300%
Companies that paid Dr. Desai the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Ronak Nimesh Desai graduated from American University of Antigua College of Medicine
Dr. Desai graduated from American University of Antigua College of Medicine in 2010. Dr. Desai is a member of American Association of Physicians of Indian Origin, MSSNY and SHM.
- Medical school
- Board certified in internal medicine
- Board certified in obesity medicine
- Board certified in certified medical examiner
Source: Dmand AI Professional Profile Data
Dr. Ronak Nimesh Desai accepts plans from 2 insurance carriers
Dr. Desai is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Desai accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Ronak Nimesh Desai'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Ronak Nimesh Desai
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. Ronak Nimesh Desai's NPI number?
Dr. Ronak Nimesh Desai's NPI number is 1154620987. It was assigned on March 18, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Ronak Nimesh Desai?
Dr. Ronak Nimesh Desai is an internist in Fontana, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Ronak Nimesh Desai practice?
Dr. Desai practices at 9961 Sierra Ave, Fontana, CA 92335. Dr. Desai's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
What is Dr. Ronak Nimesh Desai's office phone number?
The practice phone on file for Dr. Desai is (909) 427-5000.
What is Dr. Ronak Nimesh Desai's medical license number?
Dr. Desai's South Carolina license number on file is 38904, one of the licenses on file in 4 states.
Which states has Dr. Ronak Nimesh Desai been licensed in?
Dmand AI has state licenses on file for Dr. Desai in South Carolina (2015 to 2021), California (2019 to 2027), New York (2014 to 2025) and Virginia (2011 to 2014).
Which hospitals is Dr. Ronak Nimesh Desai affiliated with?
Dr. Desai practices at Fontana Medical Center in Fontana, California.
What medical group is Dr. Ronak Nimesh Desai part of?
Dr. Desai is linked to Southern California Permanente Medical Group.
Does Dr. Ronak Nimesh Desai accept Medicare?
Yes. CMS data shows Dr. Desai billed Medicare for 1,453 services in 2019, and Dr. Desai accepts Medicare assignment.
Is Dr. Ronak Nimesh Desai board certified?
Yes. Dr. Desai is board certified in internal medicine by the American Board of Internal Medicine.
Show 6 more questionsShow fewer questions
What services does Dr. Ronak Nimesh Desai bill to Medicare?
In 2019, Dr. Desai's most billed Medicare services were office visit, established patient (99214), surgery: heart and blood vessels (36415) and office visit, established patient (99213).
Where did Dr. Ronak Nimesh Desai go to medical school?
Dr. Desai graduated from American University of Antigua College of Medicine in 2010.
What drugs does Dr. Ronak Nimesh Desai prescribe most?
In 2024 Medicare Part D data, Dr. Desai's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Amlodipine Besylate.
Has Dr. Ronak Nimesh Desai received payments from drug or device companies?
CMS Open Payments shows $8,171 in general payments to Dr. Desai from 29 companies from 2016 to 2025. The largest total came from Amgen Inc.
How long has Dr. Ronak Nimesh Desai been practicing?
Dr. Desai graduated from medical school in 2010, 16 years ago.
What insurance does Dr. Ronak Nimesh Desai accept?
Dr. Desai is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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