Mark Leja, APN
NPI 1669242483 · Psychiatric/Mental Health Nurse Practitioner · Elizabeth, NJ
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Leja, APN is a Psychiatric/Mental Health Nurse Practitioner provider in Elizabeth, NJ (NPI 1669242483).
Provider details
- NPI number
- 1669242483
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- APN
- Sex
- Male
- Sole proprietor
- Yes
- License
- 26NJ14964400 (NJ)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
2 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 16 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Duloxetine Hcl | 51 |
| Aripiprazole | 38 |
| Quetiapine Fumarate | 34 |
| Benztropine Mesylate | 33 |
| Buspirone Hcl | 33 |
| Olanzapine | 32 |
| Trazodone Hcl | 32 |
| Divalproex Sodiumbrand: Divalproex Sodium Er | 31 |
| Risperidone | 30 |
| Bupropion Hcl |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$114 across 7 records (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
Registry dates
- Enumerated
- 2024-01-03
- Last updated
- 2024-03-06
- Certified
- 2024-01-31
Frequently asked questions
- What is Mark Leja's NPI number?
- Mark Leja's National Provider Identifier (NPI) is 1669242483, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Leja's specialty?
- Mark Leja is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Mark Leja located?
- Mark Leja's practice location on file with NPPES is 654 E Jersey St, Elizabeth, NJ 07206-1261.
- What is Mark Leja's phone number?
- The practice phone number listed in the NPPES registry for Mark Leja is (908) 994-7552.
- Does Mark Leja accept Medicare?
- Mark Leja is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Leja's NPI active?
- Yes — Mark Leja's NPI (1669242483) is active in the NPPES registry as of the last update on 2024-03-06.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.