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Dr. Arushi Manekha Defonseka, MD
NPI1578717062
- Medicare services, 2019
- 13
- Part D claims, 2020
- 218
- Publications
- 2
- Industry payments
- $217
- State licenses
- 2
- Practice address
- 14445 W Olive View Dr, Sylmar, CA 91342
- Practice phone
- Call (747) 210-3300
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Olive View - UCLA Medical Center
Sylmar, California
Find Dr. Defonseka's professional email, personal email and mobile number
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Dr. Arushi Manekha Defonseka is a gastroenterologist in Sylmar, California
Dr. Defonseka practices at Olive View - UCLA Medical Center in Sylmar, California.
Dr. Defonseka's NPI, 1578717062, was assigned on November 10, 2008. Dr. Defonseka holds Maryland license D77179.
NPI and contact details
- NPI
- 1578717062NPI Registry (opens in a new tab)
- NPI enumeration date
- November 10, 2008
- NPI status
- Active
- Practice phone
- (747) 210-3300
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Arushi Manekha Defonseka practices at Olive View - UCLA Medical Center in Sylmar, California
Dr. Defonseka's primary practice is Olive View - UCLA Medical Center, at 14445 W Olive View Dr, Sylmar, CA 91342 in Los Angeles County. The practice phone is (747) 210-3300.
- Olive View - UCLA Medical Center14445 W Olive View Dr, Sylmar, CA 91342 · Los Angeles CountyPhone(747) 210-3300
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Arushi Manekha Defonseka is affiliated with 1 site of care
Dr. Defonseka's primary practice is Olive View - UCLA Medical Center in Sylmar, California.
Olive View - UCLA Medical CenterPrimary
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at Dr. Arushi Manekha Defonseka's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Defonseka practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Olive View - UCLA Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Arushi Manekha Defonseka is one of 1,977 gastroenterologists in California
Gastroenterology is Dr. Defonseka's primary specialty in the NPI Registry, under taxonomy code 207RG0100X. Dmand AI has Dr. Defonseka's licenses on file in 2 states: Maryland and District of Columbia.
Specialties and state licenses
- Gastroenterology, MarylandPrimary
- District of Columbia license
Gastroenterologists near Dr. Defonseka
Counts of gastroenterologists with a Dmand AI profile, by place and practice. Each opens the list.
1,977gastroenterologists in California
8gastroenterologists in Sylmar
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Arushi Manekha Defonseka billed Medicare for 13 services in 2019
CMS data shows 13 Medicare services from Dr. Defonseka across 1 procedure code in 2019, all of them office visits. Medicare paid $661 for them. Every service was in an office.
Medicare services, 201913
Paid by Medicare$661
Procedure codes1
Dr. Defonseka's Medicare services by type, 2016 to 2019
- 2016
- 2019
- Office and hospital visits
- 2016: 1472019: 1391%
- Surgery
- 2016: 642019: 0100%
Dr. Defonseka compared with the California median for gastroenterologists, 2019
- Dr. Defonseka
- California median
- Medicare services
- 13vs 58698% below
- Part D claims
- 218vs 38043% below
Medians across 1,875 gastroenterologists in California with Dmand AI profiles that report each measure.
Dr. Defonseka'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Defonseka and other gastroenterologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Arushi Manekha Defonseka's patients have a median age of 48
Across all payers, Dmand AI patient panel data puts Dr. Defonseka's median patient age at 48, with 0% women.
Dr. Defonseka's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 48
Patient panel by sex, all payers
- Women0%
- Men100%
Source: Dmand AI Patient Panel Data
Dr. Arushi Manekha Defonseka wrote 218 Medicare Part D claims in 2020
In 2020, Dr. Defonseka wrote 218 Medicare Part D claims. They cover 10 drugs, with $44,276 in total drug cost. In 2019, CMS named 664 claims across 14 drugs.
Part D claims, 2020218
Drugs named by CMS10
Total drug cost$44,276
Dr. Defonseka's most prescribed drugs by claims, 2020
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2019 to 2020
- 2019
- 2020
- Claims for drugs CMS names
- 2019: 6642020: 21867%
Drugs named by CMS: 10 in 2020, 14 in 2019.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Arushi Manekha Defonseka has 2 publications on record
Dmand AI links 2 papers to Dr. Defonseka. Dr. Defonseka's most frequent co-authors are David I. Croteau, David J. Croteau, MD, FRCPC and Paul R. Lee, MD.
Papers2
Dr. Defonseka's most frequent co-authors
- David I. Croteau1 shared paper
- David J. Croteau, MD, FRCPC1 shared paper
- Paul R. Lee, MD1 shared paper
Recent publications by Dr. Defonseka
See who Dr. Defonseka researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Defonseka 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. Arushi Manekha Defonseka received $217 in industry payments in 2016
CMS Open Payments shows 3 general payments to Dr. Defonseka from 2 drug and device companies in 2016. Food and beverage make up the largest share, 100% of the total. Abbvie Inc. paid the most, $203.
Companies that paid Dr. Defonseka the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Arushi Manekha Defonseka'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 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) |
| 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) |
| 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. Arushi Manekha Defonseka
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. Arushi Manekha Defonseka's NPI number?
Dr. Arushi Manekha Defonseka's NPI number is 1578717062. It was assigned on November 10, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Arushi Manekha Defonseka?
Dr. Arushi Manekha Defonseka is a gastroenterologist in Sylmar, California. The primary specialty in the NPI Registry is Gastroenterology Physician (taxonomy code 207RG0100X).
Where does Dr. Arushi Manekha Defonseka practice?
Dr. Defonseka practices at 14445 W Olive View Dr, Sylmar, CA 91342. Dr. Defonseka's primary practice is Olive View - UCLA Medical Center in Sylmar, California.
What is Dr. Arushi Manekha Defonseka's office phone number?
The practice phone on file for Dr. Defonseka is (747) 210-3300.
What is Dr. Arushi Manekha Defonseka's medical license number?
Dr. Defonseka holds Maryland license D77179, one of the licenses on file in 2 states.
Which states has Dr. Arushi Manekha Defonseka been licensed in?
Dmand AI has state licenses on file for Dr. Defonseka in Maryland and District of Columbia.
Does Dr. Arushi Manekha Defonseka accept Medicare?
Yes. CMS data shows Dr. Defonseka billed Medicare for 13 services in 2019.
What services does Dr. Arushi Manekha Defonseka bill to Medicare?
In 2019, Dr. Defonseka's most billed Medicare services were office visit, established patient (99213).
What drugs does Dr. Arushi Manekha Defonseka prescribe most?
In 2020 Medicare Part D data, Dr. Defonseka's most prescribed drugs by claims were Pantoprazole Sodium, Mesalamine and Sucralfate.
Has Dr. Arushi Manekha Defonseka received payments from drug or device companies?
CMS Open Payments shows $217 in general payments to Dr. Defonseka from 2 companies from 2016 to 2016. The largest total came from Abbvie Inc.
Show 3 more questionsShow fewer questions
How long has Dr. Arushi Manekha Defonseka been practicing?
Dr. Defonseka's NPI was assigned in 2008.
Does Dr. Arushi Manekha Defonseka do research?
Dmand AI links 2 publications to Dr. Defonseka.
Who does Dr. Arushi Manekha Defonseka publish with?
Dr. Defonseka's most frequent co-authors are David I. Croteau (1 shared paper), David J. Croteau, MD, FRCPC (1 shared paper) and Paul R. Lee, MD (1 shared paper).
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