Irena Demario, D.O.
NPI 1538502075 · Internal Medicine Physician · Livingston, NJ
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Irena Demario, D.O. is a Internal Medicine Physician provider in Livingston, NJ (NPI 1538502075).
Provider details
- NPI number
- 1538502075
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,086 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 876 | $122 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 136 | $120 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 49 | $77 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 14 | $173 |
| Advance Care Planning, First 30 Minutes99497 | 11 | $80 |
Typical Medicare-allowed amounts for these services range $77–$173 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Registry dates
- Enumerated
- 2013-04-15
- Last updated
- 2016-06-21
Frequently asked questions
- What is Irena Demario's NPI number?
- Irena Demario's National Provider Identifier (NPI) is 1538502075, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Irena Demario's specialty?
- Irena Demario is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Irena Demario located?
- Irena Demario's practice location on file with NPPES is 94 Old Short Hills Rd, Livingston, NJ 07039-5672.
- What is Irena Demario's phone number?
- The practice phone number listed in the NPPES registry for Irena Demario is (973) 322-5000.
- Does Irena Demario accept Medicare?
- Irena Demario is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Irena Demario's NPI active?
- Yes — Irena Demario's NPI (1538502075) is active in the NPPES registry as of the last update on 2016-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.