Gregory Berlin, PH.D.
Psychologist · Greenwich, CT
At a glance
55 Holly Hill Ln, Greenwich, CT 06830-6074
NPPES record updated Oct 8, 2021. Public records can lag behind changes at a practice.
Before you call: a quick checklist
- Are you accepting new patients?
- Do you accept my specific insurance plan?
- Do you provide the service I need at this address?
- Do I need a referral, and what is the earliest appointment?
Insurance participation and appointment availability are not established by these public records.
Medicare & insurance
This clinician has a currently effective opt-out record in the imported CMS file. Ask the practice about payment arrangements before booking.
- Effective Jul 1, 2025 through Jul 1, 2027
Source: Opt Out Affidavits : 2026-08-01 · Reporting period: 2026-08-01 to 2026-08-31 · Published Sep 21, 2026.
How to check your coverage
Use your plan’s provider directory or the member-services number on your insurance card. Confirm the clinician, practice address, service, and whether a referral is required. A missing opt-out record does not establish Medicare acceptance.
Check the official Medicare directory ↗Practice location
55 Holly Hill LnGreenwich, CT 06830-6074
Education & affiliations
No matching clinician background record in the imported CMS release.
Graduation year does not establish years in practice. A reported affiliation does not establish employment, current admitting privileges, or insurance participation.
Source: CMS National Downloadable File · Published Oct 15, 2026.
Procedures in the public data
Reported activity can help you ask more informed questions about a practice’s services.
No displayed procedure-category record in this release. This does not mean the clinician performs no procedures.
CMS uses a one-year claims window with a reporting lag. Counts cover the Medicare activity included by CMS, not all patients. “1–10” is a published range. Volume is not a quality or outcomes score. Coverage and methodology
Source: CMS Utilization Data · Published Oct 15, 2026.
Find providers with a similar service mix
Compare 2024 published Medicare activity in the same reported specialty, here or in another city.
Industry-reported general payments
No matching general-payment summary in the imported release. This is not a verified zero and does not rule out other payment types or years.
Source: CMS 2025 payments grouped by covered recipient and nature of payments · Published Jun 30, 2026.
Professional details: NPI, taxonomy & registry record
Registry details
- Primary taxonomy
- Psychologist
- Taxonomy code
- 103T00000X
- Enumeration date
- Jul 14, 2021
- Record updated
- Oct 8, 2021
More registry details
- Provider type
- Individual · Type 1
- Reported credentials
- PH.D.
Reported taxonomies and licenses
103T00000X · Primary
License numbers and credentials are reported to NPPES; HCPList does not independently verify them.
Practice location
55 Holly Hill LnGreenwich, CT 06830-6074
- Phone
- (203) 863-2939
Mailing address
55 HOLLY HILL LNGREENWICH, CT 068306074
Information may be outdated or incomplete. Confirm details directly with the practice. HCPList is an independent directory and is not affiliated with CMS.
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