Provider Profile
Gian A. Leonzon, MSN, RN-BC, PMHNP-BC
Unclaimed ProfileAbout Gian Leonzon
Listed in the NPI registry as a nurse practitioner — psychiatric/mental health, Gian A. Leonzon, MSN, RN-BC, PMHNP-BC practices in Jamaica, NY. Gian is also listed as specializing in registered nurse. According to Medicare claims data, Gian cared for 63 Medicare patients across 433 services. The services billed most often include established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it — free, and no identity document with a practice or institutional email.
Education & Training
Specialty
Credentials & Licensing
License numbers are what the provider reported to NPPES when the NPI was issued or updated. NPPES does not verify licensure; confirm current standing with the state licensing board.
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (718) 704-5488
- Email not available
Practice Locations
161-10 JAMAICA AVE., 2ND FLOOR
Jamaica, NY 11432
Conditions and Services Within This Provider's Scope
Within Nurse Practitioner - Psychiatric/Mental Health generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Addiction
- Gambling disorder
- Quitting smoking
- Screen Addiction
Addiction & substance use
- Alcohol use disorder
- Drug addiction
Anxiety & panic
- Agoraphobia
- Anxiety
- Panic disorder
- Social anxiety disorder
- Specific phobias
Attention & learning
- ADHD
- Autism
Behavioral health
- Porn addiction
- Self-harm
Behavioral issues
- Anger issues
Child & adolescent
- Oppositional defiant disorder
- Severe Temper Tantrums and Meltdowns
Cognitive disorders
- Dementia
- Executive dysfunction
Cognitive issues
- Brain Fog and Mental Fatigue
- Dementia with behavioral symptoms
- Mild cognitive impairment
Crisis & safety
- Suicidal thoughts
Eating disorders
- Anorexia nervosa
- Binge eating
- Eating disorders
Medication side effects
- Involuntary Twitches from Meds
Mood disorders
- Bipolar disorder
- Depression
- Emotional Numbness
- Menopause Mood Swings and Anxiety
- Mood swings
- Postpartum depression
- Premenstrual dysphoric disorder
- Seasonal affective disorder
Obsessions & compulsions
- Body image issues
- Hoarding
- OCD
- Skin picking and hair pulling
Personality disorders
- Borderline personality disorder
Psychotic disorders
- Delusional disorder
- Hearing Voices and Hallucinations
- Schizoaffective disorder
- Schizophrenia
Sleep
- Chronic Nightmares
- Insomnia and Sleep Problems
- Neurologic sleep disorders
Stress & lifestyle
- Burnout
- Chronic stress
- Gaslighting and manipulation
Trauma & stress
- Adjustment disorder
- Dissociative disorders
- Illness anxiety disorder
- Prolonged grief disorder
- Trauma
Procedures & services
Addiction treatment
- Dual Diagnosis Addiction Treatment
- Suboxone Treatment and MAT
- Vivitrol and Naltrexone Treatment
Consultations
- Holistic Mental Health Consultation
- Transcranial Magnetic Stimulation (TMS) Consultation
Crisis care
- Urgent Psychiatric Consultation
Evaluations & paperwork
- Child Psychiatric Evaluation
- Cognitive Assessment
- Disability Mental Health Evaluation
- Gender-Affirming Mental Health Letter
- Psychiatric Clearance for Surgery
- School Accommodation Evaluation
- Treatment-Resistant Depression Evaluation
Evaluations & testing
- ADHD Testing and Diagnosis
- Adolescent Psychiatric Evaluation
- DNA drug response testing
- Emotional Support Animal (ESA) Evaluation
- FMLA and Mental Health Leave Paperwork
- Postpartum Mental Health Screening
- Psychiatric evaluation
- Second Opinion on Mental Health Diagnosis
Interventional treatments
- Ketamine Therapy Consultation
- Spravato (Esketamine) Treatment
Medication management
- Antidepressant Prescription
- Antipsychotic Medication Management
- Anxiety Medication Management
- Benzodiazepine Tapering
- Lab Work for Psychiatric Medications
- Lithium Monitoring and Blood Level Checks
- Long-Acting Antipsychotic Shot
- Medication management
- Mood Stabilizer Management
- Non-Stimulant ADHD Medication Management
- Prescription Refill Visit
- Sleep Medication Management
- Smoking Cessation Medication Visit
- Stimulant Medication Monitoring
- Switching Antidepressants
- Tapering Off Psychiatric Medication
- Tardive Dyskinesia Treatment
- Weight Management for Psychiatric Med Side Effects
Telehealth
- Telepsychiatry
Therapy
- Acceptance and commitment therapy (ACT)
- Anger Management Counseling
- Bereavement counseling
- Insomnia Treatment (CBT-I)
- Somatic Calming and Relaxation Training
- Suicide safety planning
Therapy & counseling
- Cognitive Behavioral Therapy (CBT)
- Couples and Family Mental Health Counseling
- Dialectical Behavior Therapy (DBT) Skills
- Exposure and Response Prevention
- Mindfulness-based stress reduction
- Prolonged exposure therapy
- Supportive psychotherapy
Procedures Most Often Billed to Medicare
433 services · 63 patients · 1 distinct code
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more | Office visit | 99212 |
433 | More than most peers in Psychiatric Nurse Practitioner |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other nurse practitioners in Jamaica 8
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2017 at Other 8
Providers who graduated from the same medical school in the same year.
Common questions
What is Gian A. Leonzon, MSN, RN-BC's specialty?
Gian A. Leonzon, MSN, RN-BC is a nurse practitioner in Jamaica, NY. That is the designation recorded for this NPI in the federal registry, where it is listed as “Nurse Practitioner — Psychiatric/Mental Health”.
NPI registry
Where can I find Gian A. Leonzon, MSN, RN-BC?
Gian A. Leonzon, MSN, RN-BC is listed at 161-10 Jamaica Ave., 2Nd Floor, Jamaica, NY 11432. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Gian A. Leonzon, MSN, RN-BC?
The number on file is (718) 704-5488. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Gian A. Leonzon, MSN, RN-BC's NPI number?
Gian A. Leonzon, MSN, RN-BC's National Provider Identifier is 1306392246. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Gian A. Leonzon, MSN, RN-BC's education?
Gian A. Leonzon, MSN, RN-BC attended Other, graduating in 2017. This comes from the CMS National Downloadable File.
CMS public data
How long has Gian A. Leonzon, MSN, RN-BC been practicing?
Gian A. Leonzon, MSN, RN-BC has 9 years experience. Calculated from a graduation year of 2017, reported in the CMS National Downloadable File.
CMS public data
What is Gian A. Leonzon, MSN, RN-BC known for?
According to Medicare billing data, Gian A. Leonzon, MSN, RN-BC the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Gian A. Leonzon, MSN, RN-BC confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Gian A. Leonzon, MSN, RN-BC. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.