Are you Alexander T. O'Brien, PMHNP? This profile is yours to edit: update your address, phone, photo and services.
Edit this profileAt a glance
- 300 South St, Chestnut Hill, MA 02467
About Alexander O'brien
Listed in the NPI registry as a nurse practitioner — psychiatric/mental health, Alexander T. O'Brien, PMHNP practices in Chestnut Hill, MA. According to Medicare claims data, Alexander cared for 112 Medicare patients across 347 services. The services billed most often include subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes, subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes, and hospital discharge day management, more than 30 minutes. NPI 1598420770 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Specialty
Credentials & Licensing
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
- (617) 469-0300
- Email not available
Practice Locations
300 SOUTH ST
Chestnut Hill, MA 02467
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
Cognitive issues
Mood disorders
- Emotional Numbness
- Menopause Mood Swings and Anxiety
- Bipolar disorder
- Depression
- Mood swings
- Postpartum depression
- Premenstrual dysphoric disorder
- Seasonal affective disorder
Sleep
Addiction
Addiction & substance use
Anxiety & panic
Attention & learning
Behavioral health
Behavioral issues
Child & adolescent
Cognitive disorders
Crisis & safety
Eating disorders
Medication side effects
Obsessions & compulsions
Personality disorders
Psychotic disorders
Stress & lifestyle
Trauma & stress
Procedures & services
Addiction treatment
Consultations
Crisis care
Evaluations & paperwork
- Child Psychiatric Evaluation
- Disability Mental Health Evaluation
- Gender-Affirming Mental Health Letter
- Psychiatric Clearance for Surgery
- School Accommodation Evaluation
- Treatment-Resistant Depression Evaluation
- Cognitive Assessment
Evaluations & testing
- ADHD Testing and Diagnosis
- Adolescent Psychiatric Evaluation
- Emotional Support Animal (ESA) Evaluation
- FMLA and Mental Health Leave Paperwork
- Postpartum Mental Health Screening
- Second Opinion on Mental Health Diagnosis
- DNA drug response testing
- Psychiatric evaluation
Interventional treatments
Medication management
- Antidepressant Prescription
- Antipsychotic Medication Management
- Anxiety Medication Management
- Benzodiazepine Tapering
- Lithium Monitoring and Blood Level Checks
- Long-Acting Antipsychotic Shot
- Non-Stimulant ADHD Medication Management
- Prescription Refill Visit
- Smoking Cessation Medication Visit
- Stimulant Medication Monitoring
- Switching Antidepressants
- Tardive Dyskinesia Treatment
- Weight Management for Psychiatric Med Side Effects
- Lab Work for Psychiatric Medications
- Medication management
- Mood Stabilizer Management
- Sleep Medication Management
- Tapering Off Psychiatric Medication
Therapy
- Somatic Calming and Relaxation Training
- Acceptance and commitment therapy (ACT)
- Anger Management Counseling
- Bereavement counseling
- Insomnia Treatment (CBT-I)
- Suicide safety planning
Therapy & counseling
- Couples and Family Mental Health Counseling
- Dialectical Behavior Therapy (DBT) Skills
- Cognitive Behavioral Therapy (CBT)
- Exposure and Response Prevention
- Mindfulness-based stress reduction
- Prolonged exposure therapy
- Supportive psychotherapy
Telehealth
Procedures Most Often Billed to Medicare
347 services · 112 patients · 4 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Psychiatric diagnostic evaluation with medical services | Treatment | 90792 |
23 | As often as other peers in Psychiatric Nurse Practitioner |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
176 | More often than most peers in Psychiatric Nurse Practitioner |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
117 | More often than most peers in Psychiatric Nurse Practitioner |
| Hospital discharge day management, more than 30 minutes | Office visit | 99239 |
31 | More often 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 at this location 2
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 2
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 13 related providers in 2 groups
Other nurse practitioners in Chestnut Hill 5
Same specialty, same city.
Also performs Psychiatric diagnostic evaluation with medical services 8
Providers in MA who bill this service to Medicare most often.
Common questions
What does Alexander T. O'Brien specialize in?
Alexander T. O'Brien is a nurse practitioner in Chestnut Hill, MA. 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 is Alexander T. O'Brien located?
Alexander T. O'Brien is listed at 300 South St, Chestnut Hill, MA 02467. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Alexander T. O'Brien's phone number?
The number on file is (617) 469-0300. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Alexander T. O'Brien's NPI number?
Alexander T. O'Brien's National Provider Identifier is 1598420770. 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
How long has Alexander T. O'Brien been practicing?
Alexander T. O'Brien has 5+ years experience. Registered with an NPI since 2021. National Provider Identifiers only began in 2005, so a provider who qualified earlier may have practiced for longer than this.
NPI registry
What does Alexander T. O'Brien do most often?
According to Medicare billing data, Alexander T. O'Brien provides treatments such as psychiatric diagnostic evaluation with medical services, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Alexander T. O'Brien confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Alexander T. O'Brien. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.