Gian Leonzon, MSN, RN-BC, PMHNP-BC
NPI 1306392246 · Psychiatric/Mental Health Nurse Practitioner · Jamaica, NY
Enrolled with Medicare as Practitioner - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gian Leonzon, MSN, RN-BC, PMHNP-BC is a Psychiatric/Mental Health Nurse Practitioner provider in Jamaica, NY (NPI 1306392246).
Provider details
- NPI number
- 1306392246
- Entity type
- Individual
- Primary specialty
- Psychiatric/Mental Health Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- MSN, RN-BC, PMHNP-BC
- Sex
- Male
- Sole proprietor
- No
- License
- 689712 (NY)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Nursing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
9 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
433 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 433 | $31 |
Typical Medicare-allowed amounts for these services range $31–$31 (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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 46 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Zolpidem Tartrate | 490 | 61 |
| Clonazepam | 351 | 39 |
| Trazodone Hcl | 340 | 46 |
| Sertraline Hcl | 330 | 38 |
| Mirtazapine | 322 | 37 |
| Hydroxyzine Hcl | 311 | 42 |
| Fluoxetine Hcl | 298 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-08-31
- Last updated
- 2022-07-21
Frequently asked questions
- What is Gian Leonzon's NPI number?
- Gian Leonzon's National Provider Identifier (NPI) is 1306392246, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gian Leonzon's specialty?
- Gian Leonzon is listed in the NPPES registry with a primary specialty of Psychiatric/Mental Health Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Gian Leonzon located?
- Gian Leonzon's practice location on file with NPPES is 161-10 Jamaica Ave., 2nd Floor, Jamaica, NY 11432.
- What is Gian Leonzon's phone number?
- The practice phone number listed in the NPPES registry for Gian Leonzon is (718) 704-5488.
- Does Gian Leonzon accept Medicare?
- Gian Leonzon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gian Leonzon's NPI active?
- Yes — Gian Leonzon's NPI (1306392246) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.