Dr. Roger C. On, MD
- Medicare services, 2021
- 204
- Part D claims, 2022
- 111
- Industry payments
- $10,795
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 16111 Plummer St, Sepulveda, CA 91343
- Practice phone
- Call (310) 268-3152
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Sepulveda VA Medical Center
VA Clinic / Health Facility · Sepulveda, California
Find Dr. On'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. Roger C. On is a cardiologist in North Hills, California
Dr. On practices at Sepulveda VA Medical Center in Sepulveda, California.
Dr. On's NPI, 1255334769, was assigned on May 30, 2005. Dr. On graduated from Tufts University School Of Medicine in 1978. Dr. On holds California license G40341.
- NPI
- 1255334769NPI Registry (opens in a new tab)
- NPI enumeration date
- May 30, 2005
- NPI status
- Active
- Practice phone
- (310) 268-3152
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 74
- Medical school graduation
- 1978
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Roger C. On practices at Sepulveda VA Medical Center in Sepulveda, California
Dr. On's primary practice is Sepulveda VA Medical Center, at 16111 Plummer St, Sepulveda, CA 91343. The practice phone is (310) 268-3152.
- Sepulveda VA Medical Center16111 Plummer St, Sepulveda, CA 91343Phone(310) 268-3152
Source: Dmand AI Affiliation Data
Dr. Roger C. On is affiliated with 1 site of care and 1 medical group
Dr. On's primary practice is Sepulveda VA Medical Center in Sepulveda, California. Dmand AI also links Dr. On to 1 medical group, named with a free account. Dr. On's employer is on file too: a government & correctional health.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Roger C. On's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. On practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Sepulveda VA Medical Center | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Roger C. On is one of 2,375 cardiologists in California
Cardiovascular disease is Dr. On's primary specialty in the NPI Registry, under taxonomy code 207RC0000X. Dr. On is board certified in cardiovascular disease by the American Board of Internal Medicine. Dr. On is licensed in California.
Specialties and state licenses
- Cardiovascular disease, CaliforniaPrimary
Cardiologists near Dr. On
Counts of cardiologists 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. Roger C. On billed Medicare for 204 services in 2021
CMS data shows 204 Medicare services from Dr. On across 4 procedure codes in 2021. Medicare paid $17,026 for them.
Dr. On's Medicare services by type, 2020 to 2021
- 2020
- 2021
- Office and hospital visits
- 2020: 2102021: 13735%
- Tests and treatments
- 2020: 1492021: 6755%
Where Dr. On's Medicare services took place, 2021
- In an office17887%
- In a facility2613%
Dr. On compared with the California median for cardiologists, 2021
- Dr. On
- California median
- Medicare services
- 204vs 1,56087% below
- Part D claims
- 111vs 1,41092% below
Medians across 2,237 cardiologists in California with Dmand AI profiles that report each measure.
Dr. On's most billed Medicare procedure codes, 2021
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. On and other cardiologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Roger C. On's patients have a median age of 74
Across all payers, Dmand AI patient panel data puts Dr. On's median patient age at 74, with 48% women.
Dr. On's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 74
Patient panel by sex, all payers
- Women48%
- Men52%
Source: Dmand AI Patient Panel Data
Dr. Roger C. On wrote 111 Medicare Part D claims in 2022
In 2022, Dr. On wrote 111 Medicare Part D claims. They cover 6 drugs, with $6,620 in total drug cost. In 2021, CMS named 825 claims across 26 drugs.
Dr. On's most prescribed drugs by claims, 2022
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, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 8252022: 11187%
Drugs named by CMS: 6 in 2022, 26 in 2021.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Roger C. On received $10,795 in industry payments from 2016 to 2025
CMS Open Payments shows 471 general payments to Dr. On from 50 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 99% of the total. Boehringer Ingelheim Pharmaceuticals, Inc. paid the most, $1,283.
General payments to Dr. On by program year, 2016 to 2025
General payments to Dr. On by kind, 2016 to 2025
- Food and beverage$10,70799%
- Education$881%
Companies that paid Dr. On 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. Roger C. On has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. On, most recently CMS Stage 1 EHR in 2014.
Awards and honors for Dr. On
- 2014
- CMS Stage 1 EHR
- 2013
- ACC Fellow
Source: Dmand AI Professional Profile Data
Dr. Roger C. On graduated from Tufts University School Of Medicine
Dr. On graduated from Tufts University School Of Medicine in 1978. Dr. On is a member of ACC and ASE.
- Medical school
- Board certified in cardiovascular disease
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Roger C. On accepts plans from 3 insurance carriers
Dr. On is in network with 3 carriers, including Elevance, Molina and Humana. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Elevance
- Molina
- Humana
Plan types Dr. On accepts, by number of carriers
- HMO3
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Roger C. On'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Roger C. On
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. Roger C. On's NPI number?
Dr. Roger C. On's NPI number is 1255334769. It was assigned on May 30, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Roger C. On?
Dr. Roger C. On is a cardiologist in North Hills, California. The primary specialty in the NPI Registry is Cardiovascular Disease Physician (taxonomy code 207RC0000X).
Where does Dr. Roger C. On practice?
Dr. On practices at 16111 Plummer St, Sepulveda, CA 91343. Dr. On's primary practice is Sepulveda VA Medical Center in Sepulveda, California. Dmand AI also links Dr. On to 1 medical group.
What is Dr. Roger C. On's office phone number?
The practice phone on file for Dr. On is (310) 268-3152.
What is Dr. Roger C. On's medical license number?
Dr. On holds California license G40341.
Does Dr. Roger C. On accept Medicare?
Yes. CMS data shows Dr. On billed Medicare for 204 services in 2021.
Is Dr. Roger C. On board certified?
Yes. Dr. On is board certified in cardiovascular disease by the American Board of Internal Medicine.
What services does Dr. Roger C. On bill to Medicare?
In 2021, Dr. On's most billed Medicare services were office visit, established patient (99214), heart test or procedure (93306) and heart test or procedure (93000).
Where did Dr. Roger C. On go to medical school?
Dr. On graduated from Tufts University School Of Medicine in 1978.
What drugs does Dr. Roger C. On prescribe most?
In 2022 Medicare Part D data, Dr. On's most prescribed drugs by claims were Rosuvastatin Calcium, Amlodipine Besylate and Carvedilol.
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Has Dr. Roger C. On received payments from drug or device companies?
CMS Open Payments shows $10,795 in general payments to Dr. On from 50 companies from 2016 to 2025. The largest total came from Boehringer Ingelheim Pharmaceuticals, Inc.
How long has Dr. Roger C. On been practicing?
Dr. On graduated from medical school in 1978, 48 years ago.
What insurance does Dr. Roger C. On accept?
Dr. On is in network with 3 carriers, including Elevance, Molina and Humana. HMO plans come from the most carriers, 3. Check the plan with the practice before a visit.
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