Dr. Sion Kumar Roy, MD
- Publications
- 5
- Hospital affiliations
- 1
- Industry payments
- $6,408
- Medical group
- 1
- Insurance carriers
- 1
- Practice address
- 1000 W Carson St, Torrance, CA 90509
- Practice phone
- Call (310) 222-2345
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Roy'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. Sion Kumar Roy is an internist in Torrance, California
Dr. Roy practices at Harbor-UCLA Medical Center in Torrance, California, part of County of Los Angeles.
Dr. Roy's NPI, 1245499656, was assigned on June 2, 2008. Dr. Roy graduated from VCU School of Medicine in 2007. Dr. Roy holds California license A111005.
- NPI
- 1245499656NPI Registry (opens in a new tab)
- NPI enumeration date
- June 2, 2008
- NPI status
- Active
- Practice phone
- (310) 222-2345
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Sion Kumar Roy practices at Harbor-UCLA Medical Center in Torrance, California
Dr. Roy's primary practice is Harbor-UCLA Medical Center, at 1000 W Carson St, Torrance, CA 90509 in Los Angeles County. The practice phone is (310) 222-2345.
- Harbor-UCLA Medical Center1000 W Carson St, Torrance, CA 90509 · Los Angeles CountyPhone(310) 222-2345
Source: Dmand AI Affiliation Data
Dr. Sion Kumar Roy is affiliated with 1 site of care and 1 medical group
Dr. Roy's primary practice is Harbor-UCLA Medical Center in Torrance, California, part of County of Los Angeles. The medical group on file is Harbor-UCLA Medical Center. Dr. Roy's employer is on file too: a hospital.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Sion Kumar Roy's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Roy practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Harbor-UCLA Medical Center | 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 County of Los Angeles and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Sion Kumar Roy is one of 16,751 internists in California
Internal medicine is Dr. Roy's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Roy is board certified in cardiovascular disease by the American Board of Internal Medicine. Dmand AI has Dr. Roy's licenses on file in 3 states: California, Virginia and District of Columbia.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- Virginia license
- District of Columbia license
Clinical focus
Dmand AI lists acute respiratory failure, chest pain and syncope & collapse among the conditions Dr. Roy treats.
Internists near Dr. Roy
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. Sion Kumar Roy's patients have a median age of 70
Across all payers, Dmand AI patient panel data puts Dr. Roy's median patient age at 70, with 41% women.
Dr. Roy's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women41%
- Men58%
Source: Dmand AI Patient Panel Data
Dr. Sion Kumar Roy has 5 publications on record
Dmand AI links 5 papers to Dr. Roy, published from 2019 to 2025. Dr. Roy's most frequent co-authors are Matthew J. Budoff, MD, Srikanth Krishnan, MD and Luay Hussein Mashaallah Alalawi, MD.
Dr. Roy's papers by year, 2019 to 2025
Dr. Roy's most frequent co-authors
- Matthew J. Budoff, MD4 shared papers
- Srikanth Krishnan, MD2 shared papers
- Luay Hussein Mashaallah Alalawi, MD1 shared paper
Recent publications by Dr. Roy
See who Dr. Roy researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Roy works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Sion Kumar Roy received $6,408 in industry payments from 2016 to 2025
CMS Open Payments shows 106 general payments to Dr. Roy from 23 drug and device companies from 2016 to 2025. Consulting fees make up the largest share, 68% of the total. Arineta, Inc paid the most, $4,355.
General payments to Dr. Roy by program year, 2016 to 2025
General payments to Dr. Roy by kind, 2016 to 2025
- Consulting fees$4,35568%
- Food and beverage$2,05332%
Companies that paid Dr. Roy 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. Sion Kumar Roy graduated from VCU School of Medicine
Dr. Roy graduated from VCU School of Medicine in 2007.
- Medical school
- Board certified in cardiovascular disease
Source: Dmand AI Professional Profile Data
Dr. Sion Kumar Roy accepts plans from 1 insurance carrier
Dr. Roy is in network with 1 carrier, including LA Care. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- LA Care
Plan types Dr. Roy accepts, by number of carriers
- HMO1
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Sion Kumar Roy'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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. Sion Kumar Roy
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. Sion Kumar Roy's NPI number?
Dr. Sion Kumar Roy's NPI number is 1245499656. It was assigned on June 2, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Sion Kumar Roy?
Dr. Sion Kumar Roy is an internist in Torrance, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Sion Kumar Roy practice?
Dr. Roy practices at 1000 W Carson St, Torrance, CA 90509. Dr. Roy's primary practice is Harbor-UCLA Medical Center in Torrance, California, part of County of Los Angeles.
What is Dr. Sion Kumar Roy's office phone number?
The practice phone on file for Dr. Roy is (310) 222-2345.
What is Dr. Sion Kumar Roy's medical license number?
Dr. Roy holds California license A111005, one of the licenses on file in 3 states.
Which states has Dr. Sion Kumar Roy been licensed in?
Dmand AI has state licenses on file for Dr. Roy in California (2010 to 2026), Virginia (2007 to 2012) and District of Columbia (2007 to 2010).
Which hospitals is Dr. Sion Kumar Roy affiliated with?
Dr. Roy practices at Harbor-UCLA Medical Center in Torrance, California.
What medical group is Dr. Sion Kumar Roy part of?
Dr. Roy is linked to Harbor-UCLA Medical Center.
Is Dr. Sion Kumar Roy board certified?
Yes. Dr. Roy is board certified in cardiovascular disease by the American Board of Internal Medicine.
Where did Dr. Sion Kumar Roy go to medical school?
Dr. Roy graduated from VCU School of Medicine in 2007.
Show 5 more questionsShow fewer questions
Has Dr. Sion Kumar Roy received payments from drug or device companies?
CMS Open Payments shows $6,408 in general payments to Dr. Roy from 23 companies from 2016 to 2025. The largest total came from Arineta, Inc.
How long has Dr. Sion Kumar Roy been practicing?
Dr. Roy graduated from medical school in 2007, 19 years ago.
Does Dr. Sion Kumar Roy do research?
Dmand AI links 5 publications to Dr. Roy, published from 2019 to 2025.
Who does Dr. Sion Kumar Roy publish with?
Dr. Roy's most frequent co-authors are Matthew J. Budoff, MD (4 shared papers), Srikanth Krishnan, MD (2 shared papers) and Luay Hussein Mashaallah Alalawi, MD (1 shared paper).
What insurance does Dr. Sion Kumar Roy accept?
Dr. Roy is in network with 1 carrier, including LA Care. HMO plans come from the most carriers, 1. Check the plan with the practice before a visit.
Selling to internal medicine practices?
See internists in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card