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Edit this profileAt a glance
- 55 Holly Hill Ln, Greenwich, CT 06830
About Dr. Berlin
Gregory Berlin, PhD is a psychologist based in Greenwich, CT. Medicare claims data shows Gregory provided 33 services to 25 patients. The services billed most often include psychotherapy, 45 minutes and psychiatric diagnostic evaluation. The provider's National Provider Identifier (NPI) is 1720650211.
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
- (203) 863-2939
- Email not available
Practice Locations
55 HOLLY HILL LN
Greenwich, CT 06830
Concerns and Conditions Addressed
Within Psychology (Unspecified) 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
Most searched conditions
Abuse and relationships
Addiction
Anxiety & Phobias
Anxiety and phobias
Behavioral & Emotional
Child & Adolescent
Child and teen issues
Eating & Body Image
Health Psychology
Identity and life stages
Interpersonal & Abuse
Life and social issues
Mindset and personality
Mood and emotions
Mood Disorders
Neurodevelopmental
Personality Disorders
Relationships
Self-Esteem & Identity
Sleep
Sleep issues
Stress & Lifestyle
Thought disorders
Trauma and abuse
Work and career
Procedures & services
Most searched procedures
Addiction support
Alternative formats
Behavioral Programs
Behavioral therapies
Brain-based therapies
Care delivery
Child & Adolescent
Evaluations & Assessments
- Autism Assessment
- Bariatric Surgery Evaluation
- Cognitive and memory testing
- Emotional Support Animal Evaluation
- Spinal Cord Stimulator Psychological Clearance
Evaluations and testing
- Adoption Psychological Evaluation
- Gender-affirming surgery evaluation
- Immigration Psychological Evaluation
- Neuropsychological Testing
Expressive therapies
Family and parenting
Mind-body therapies
Relationship Counseling
Skills training
Specialized therapy
Specialized Treatments
- Biofeedback
- Crisis intervention
- Hypnotherapy
- Ketamine-assisted counseling
- Mindfulness-based stress reduction
- Sleep counseling
Talk therapies
Therapy Modalities
Procedures Most Often Billed to Medicare
33 services · 25 patients · 2 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Psychotherapy, 45 minutes | Treatment | 90834 |
19 | Less often than most peers in Psychologist |
| Psychiatric diagnostic evaluation | Treatment | 90791 |
14 | Less often than most peers in Psychologist |
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.
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.
Common questions
What does Gregory Berlin specialize in?
Gregory Berlin is a psychologist in Greenwich, CT. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where is Gregory Berlin located?
Gregory Berlin is listed at 55 Holly Hill Ln, Greenwich, CT 06830. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Gregory Berlin's phone number?
The number on file is (203) 863-2939. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Gregory Berlin?
Gregory Berlin's National Provider Identifier is 1720650211. 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 much experience does Gregory Berlin have?
Gregory Berlin 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 Gregory Berlin do most often?
According to Medicare billing data, Gregory Berlin provides treatments such as psychotherapy, 45 minutes and psychiatric diagnostic evaluation. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Gregory Berlin's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Gregory Berlin. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.