Dr. Sam Tonthat, DO
- Medicare services, 2024
- 357
- Medicare patients, 2024
- 216
- Part D claims, 2021
- 14
- Publications
- 3
- MIPS score, 2024
- 100
- Practice address
- One Hoag Drive, Newport Beach, CA 92663
- Practice phone
- Call (949) 764-4624
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Tonthat'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. Sam Tonthat is a nephrologist in Newport Beach, California
Dr. Tonthat practices at Hoag Hospital Newport Beach in Newport Beach, California, part of Hoag Memorial Hospital Presbyterian.
Dr. Tonthat's NPI, 1699139782, was assigned on April 5, 2016. Dr. Tonthat graduated from Touro University California - Vallejo in 2016. Dr. Tonthat holds California license 20A15865.
- NPI
- 1699139782NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254664956
- NPI enumeration date
- April 5, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (949) 764-4624
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Sam Tonthat practices at 2 locations in Newport Beach, California
Dr. Tonthat's primary practice is Hoag Hospital Newport Beach, at One Hoag Drive, Newport Beach, CA 92663 in Orange County. The practice phone is (949) 764-4624. Dr. Tonthat also practices at Hoag Hospital Newport Beach, 1 Hoag Dr, Newport Beach, CA 92663.
- Hoag Hospital Newport BeachPrimaryOne Hoag Drive, Newport Beach, CA 92663 · Orange CountyPhone(949) 764-4624
- Hoag Hospital Newport Beach1 Hoag Dr, Newport Beach, CA 92663 · Orange CountyPhone(949) 764-4624
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Sam Tonthat is affiliated with 4 sites of care and 2 medical groups
Dr. Tonthat's primary practice is Hoag Hospital Newport Beach in Newport Beach, California, part of Hoag Memorial Hospital Presbyterian. Dr. Tonthat is also affiliated with Providence Mission Hospital. The medical group on file is Newport Critical Care Physicians. Dmand AI also links Dr. Tonthat to 1 more hospital, 1 group practice or clinic and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Sam Tonthat's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Tonthat practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Hoag Hospital Newport Beach | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Hoag Memorial Hospital Presbyterian and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Sam Tonthat is one of 1,401 nephrologists in California
Nephrology is Dr. Tonthat's primary specialty in the NPI Registry, under taxonomy code 207RN0300X. Dr. Tonthat is board certified in critical care medicine by the American Board of Internal Medicine. Dr. Tonthat is licensed in California.
Specialties and state licenses
- Nephrology, CaliforniaPrimary
Clinical focus
Dmand AI lists atrial fibrillation and flutter, chronic hypertension, chronic kidney disease, heart failure and intermittent racing heartbeat (PSVT) among the conditions Dr. Tonthat treats.
Nephrologists near Dr. Tonthat
Counts of nephrologists 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. Sam Tonthat billed Medicare for 357 services in 2024
CMS data shows 357 Medicare services from Dr. Tonthat across 7 procedure codes in 2024, for 216 Medicare patients. Medicare paid $48,219 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Tonthat's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5342024: 31641%
- Surgery
- 2023: 112024: 41273%
Dr. Tonthat compared with the California median for nephrologists, 2024
- Dr. Tonthat
- California median
- Medicare services
- 357vs 1,08467% below
- Medicare patients
- 216vs 30730% below
- Part D claims
- 14vs 95599% below
Medians across 1,355 nephrologists in California with Dmand AI profiles that report each measure.
Dr. Tonthat's most billed Medicare procedure codes, 2024
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. Tonthat?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Tonthat and other nephrologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Sam Tonthat treated 216 Medicare patients in 2024, average age 76
CMS counts 216 Medicare patients who saw Dr. Tonthat in 2024. The largest group is 75 to 84, with 73 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 34% are also on Medicaid. Their average risk score is 3.55, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Tonthat's median patient age at 71, with 44% women.
Dr. Tonthat's Medicare patients by age, 2024
Dr. Tonthat's Medicare patients by sex, 2024
- Women10448%
- Men11252%
Chronic conditions among Dr. Tonthat's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease64%
- Diabetes50%
- Heart failure50%
- Arthritis46%
- Ischemic heart disease44%
- Atrial fibrillation43%
Share of Medicare patients with each condition. A patient can have several.
Dr. Tonthat's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women44%
- Men56%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Sam Tonthat wrote 14 Medicare Part D claims in 2021
In 2021, Dr. Tonthat wrote 14 Medicare Part D claims. They cover 1 drug, with $44,429 in total drug cost.
Dr. Tonthat's most prescribed drugs by claims, 2021
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
Dr. Sam Tonthat scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Tonthat for performance year 2024, reported as part of a group. Dr. Tonthat accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Tonthat's MIPS scores, performance year 2024
- 100of 100Final score
- 100of 100Quality
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Sam Tonthat has 3 publications on record
Dmand AI links 3 papers to Dr. Tonthat, published from 2021 to 2024. Dr. Tonthat's most frequent co-authors are Antoney Joseph Ferrey, MD, Ramy Magdy Hanna, MD and Joline L. Chen, MD.
Dr. Tonthat's papers by year, 2021 to 2024
Dr. Tonthat's most frequent co-authors
- Antoney Joseph Ferrey, MD2 shared papers
- Ramy Magdy Hanna, MD2 shared papers
- Joline L. Chen, MD1 shared paper
Recent publications by Dr. Tonthat
See who Dr. Tonthat researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Tonthat works with, so you can find a warm path to the right nephrologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Sam Tonthat received $722 in industry payments from 2019 to 2025
CMS Open Payments shows 10 general payments to Dr. Tonthat from 7 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 87% of the total. Abiomed paid the most, $147.
General payments to Dr. Tonthat by program year, 2019 to 2025
General payments to Dr. Tonthat by kind, 2019 to 2025
- Food and beverage$62787%
- Education$9513%
Companies that paid Dr. Tonthat the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Sam Tonthat graduated from Touro University California - Vallejo
Dr. Tonthat graduated from Touro University California - Vallejo in 2016.
- Medical school
- Board certified in critical care medicine
- Board certified in internal medicine
- Board certified in nephrology
- Board certified in 2017 - 2027
Source: Dmand AI Professional Profile Data
Dr. Sam Tonthat accepts plans from 7 insurance carriers
Dr. Tonthat is in network with 7 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Elevance
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- CMS Medicare
- Molina
Plan types Dr. Tonthat accepts, by number of carriers
- Medicare7
- PPO5
- HMO2
- POS2
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Sam Tonthat'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 Affiliation DataDmand AI Practice 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 DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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)Clinician Public Reporting: Overall MIPS Performance (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 |
| 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. Sam Tonthat
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What is Dr. Sam Tonthat's NPI number?
Dr. Sam Tonthat's NPI number is 1699139782. It was assigned on April 5, 2016, and it is active in the NPI Registry.
What kind of doctor is Dr. Sam Tonthat?
Dr. Sam Tonthat is a nephrologist in Newport Beach, California. The primary specialty in the NPI Registry is Nephrology Physician (taxonomy code 207RN0300X).
Where does Dr. Sam Tonthat practice?
Dr. Tonthat practices at One Hoag Drive, Newport Beach, CA 92663. Dr. Tonthat also practices at 1 Hoag Dr, Newport Beach, CA 92663. Dr. Tonthat's primary practice is Hoag Hospital Newport Beach in Newport Beach, California, part of Hoag Memorial Hospital Presbyterian. Dmand AI also links Dr. Tonthat to 1 hospital, 1 group practice or clinic and 1 medical group.
What is Dr. Sam Tonthat's office phone number?
The practice phone on file for Dr. Tonthat is (949) 764-4624.
What is Dr. Sam Tonthat's medical license number?
Dr. Tonthat holds California license 20A15865.
Which hospitals is Dr. Sam Tonthat affiliated with?
Dr. Tonthat practices at Hoag Hospital Newport Beach in Newport Beach, California. Dr. Tonthat is also affiliated with Providence Mission Hospital. Dmand AI links Dr. Tonthat to 1 more hospital.
What medical group is Dr. Sam Tonthat part of?
Dr. Tonthat is linked to Newport Critical Care Physicians. Dmand AI links Dr. Tonthat to 1 more medical group.
Does Dr. Sam Tonthat accept Medicare?
Yes. CMS data shows Dr. Tonthat billed Medicare for 357 services in 2024, and Dr. Tonthat accepts Medicare assignment.
What is Dr. Sam Tonthat's MIPS score?
Dr. Tonthat's MIPS final score for performance year 2024 is 100 out of 100, reported as part of a group.
How many Medicare patients does Dr. Sam Tonthat see?
CMS counts 216 Medicare patients who saw Dr. Tonthat in 2024, with an average age of 76.
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Is Dr. Sam Tonthat board certified?
Yes. Dr. Tonthat is board certified in critical care medicine by the American Board of Internal Medicine.
What services does Dr. Sam Tonthat bill to Medicare?
In 2024, Dr. Tonthat's most billed Medicare services were critical care (99291), hospital inpatient care (99233) and critical care (99292).
Where did Dr. Sam Tonthat go to medical school?
Dr. Tonthat graduated from Touro University California - Vallejo in 2016.
What drugs does Dr. Sam Tonthat prescribe most?
In 2021 Medicare Part D data, Dr. Tonthat's most prescribed drugs by claims were Velphoro.
Has Dr. Sam Tonthat received payments from drug or device companies?
CMS Open Payments shows $722 in general payments to Dr. Tonthat from 7 companies from 2019 to 2025. The largest total came from Abiomed.
How long has Dr. Sam Tonthat been practicing?
Dr. Tonthat graduated from medical school in 2016, 10 years ago.
Does Dr. Sam Tonthat do research?
Dmand AI links 3 publications to Dr. Tonthat, published from 2021 to 2024.
Who does Dr. Sam Tonthat publish with?
Dr. Tonthat's most frequent co-authors are Antoney Joseph Ferrey, MD (2 shared papers), Ramy Magdy Hanna, MD (2 shared papers) and Joline L. Chen, MD (1 shared paper).
What insurance does Dr. Sam Tonthat accept?
Dr. Tonthat is in network with 7 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Blue Cross Blue Shield of Massachusetts. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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