O'Neil R. Mason, M.D.
Cardiovascular Disease Physician · Morristown, NJ
O'Neil R. Mason, M.D. is a cardiovascular disease physician with a practice address in Morristown, New Jersey, and NPI 1699046748, issued on Jan 21, 2012. Check the license (New Jersey 25MA11494000, as entered in NPPES) on the New Jersey State Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- O'Neil R. Mason
- Credential
- M.D.
- Primary taxonomy
- Cardiovascular Disease Physician 207RC0000X
- License numbers
- 25MA11494000 NJ
036152383 IL
266546 NY
Self-reported in NPPES; status is on the state search - Practice location
- 100 Madison Ave, Morristown, NJ 07960
- Phone
- (973) 971-7416
- Enumerated
- Jan 21, 2012
- Record last updated
- Sep 1, 2022
- Fax
- (973) 401-2470
- Medicare enrollment
- Enrolled (PECOS I20220915000416); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest cardiovascular disease physician records → All 1,102 in New Jersey → Look up another NPI →
Also registered at 100 Madison Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Karen AbboudDentist1659121259
- Omar Abdelfattah, MBBCHStudent in an Organized Health Care Education/Training Program1003444167
- Ahmed Abdelhalim, MDInternal Medicine Physician1104386051
- Bavly Abdelmesih, MDStudent in an Organized Health Care Education/Training Program1932901378
- Fatema Abdulhussein, MDStudent in an Organized Health Care Education/Training Program1235514274
- Arkadiy Abkin, MDAnesthesiology Physician1316928666
Verify O'Neil R. Mason in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNew Jersey State Board of Medical Examiners
Search for license 25MA11494000Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $28.57
1 payment: food and beverage; the largest payer was Edwards Lifesciences Corporation. The 16,686 providers of this specialty with any payment received $3,819.56 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Practice Associates Medical GroupMorristown, NJ
- Premier Health Associates LLCSparta, NJ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
O'Neil R. Mason among 1,102 cardiovascular disease physician records in New Jersey
O'Neil R. Mason, M.D. is one of 1,102 cardiovascular disease physician records with a practice address in New Jersey. 87% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 80% of them.
- NPI issued2012 · 80% of these records are older, 17% newer
- In a Medicare fileYes · 87% of these records are
- In the CMS Doctors and Clinicians fileYes · 76% of these records are
- Graduated2005 · median 1997 among the 833 with a school on file
- Record last updated2022 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0000X and a New Jersey practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
46 cardiovascular disease physician records list a practice address in Morristown
They are 46 of the 2,942 NPPES records with a practice address in Morristown, and 1,102 cardiovascular disease physician records in New Jersey.
All 1,102 in New Jersey → Every provider in Morristown → Cardiovascular Disease Physician nationwide →
The 8 cardiovascular disease physician records with the nearest ZIP codes
- Linda Gillam, MDMorristown, NJ 079601457359382
- Stephen Guss, M.D.Morristown, NJ 079601386642395
- Allen Hsieh, MDMorristown, NJ 079601912992769
- Robert Kipperman, M.D.Morristown, NJ 079601942297908
- Giuseppe Limandri, MDMorristown, NJ 079601548234628
- John Mondelli, M.D.Morristown, NJ 079601356340780
- Karel Raska, M.D.Morristown, NJ 079601740288752
- Derek Santiago, MDMorristown, NJ 079601649244732
Common questions
What is O'Neil R. Mason, M.D.'s NPI number?
O'Neil R. Mason, M.D.'s National Provider Identifier (NPI) is 1699046748, issued on Jan 21, 2012. An NPI identifies a provider in billing; it is not a license.
Where is O'Neil R. Mason, M.D. located?
The NPPES record lists a practice address at 100 Madison Ave, Morristown, NJ, 07960. Phone: (973) 971-7416. Providers update this record themselves, so call before visiting.
How can I verify O'Neil R. Mason, M.D.'s license?
NPPES lists New Jersey license number 25MA11494000, as entered by the provider. Search the New Jersey State Board of Medical Examiners at https://newjersey.mylicense.com/verification/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.