O'Neil Mason, M.D.
NPI 1699046748 · Cardiovascular Disease Physician · Morristown, NJ
Enrolled with Medicare as Practitioner - Cardiovascular Disease (cardiology) · source: CMS PECOS Public Provider Enrollment (2026.04.01)
O'Neil Mason, M.D. is a Cardiovascular Disease Physician provider in Morristown, NJ (NPI 1699046748).
Provider details
- NPI number
- 1699046748
- Entity type
- Individual
- Primary specialty
- Cardiovascular Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 266546 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
14 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
980 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 379 | $72 |
| Ultrasound of Heart With Probe in Esophagus During Surgery on Heart Or Great Blood Vessels With Report93355 | 170 | $233 |
| Ultrasound of Heart With Color-Depicted Blood Flow, Rate, Direction and Valve Function93306 | 146 | $72 |
| Ultrasound of Heart, Follow-Up93308 | 81 | $26 |
| Ultrasound of Heart With Probe in Esophagus, With Report93312 | 60 | $111 |
| Ultrasound of Heart Blood Flow, Valves and Chambers |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$29 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 676 N Saint Clair StChicago, IL 60611-2927Phone: (312) 926-2000
Registry dates
- Enumerated
- 2012-01-21
- Last updated
- 2022-09-01
- Certified
- 2022-09-01
Frequently asked questions
- What is O'Neil Mason's NPI number?
- O'Neil Mason's National Provider Identifier (NPI) is 1699046748, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is O'Neil Mason's specialty?
- O'Neil Mason is listed in the NPPES registry with a primary specialty of Cardiovascular Disease Physician (Allopathic & Osteopathic Physicians).
- Where is O'Neil Mason located?
- O'Neil Mason's practice location on file with NPPES is 100 Madison Ave, Morristown, NJ 07960-6136.
- What is O'Neil Mason's phone number?
- The practice phone number listed in the NPPES registry for O'Neil Mason is (973) 971-7416.
- Does O'Neil Mason accept Medicare?
- O'Neil Mason is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is O'Neil Mason's NPI active?
- Yes — O'Neil Mason's NPI (1699046748) is active in the NPPES registry as of the last update on 2022-09-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.