Gregory Berlin, PH.D.
NPI 1720650211 · Psychologist · Greenwich, CT
Gregory Berlin, PH.D. is a Psychologist provider in Greenwich, CT (NPI 1720650211).
Provider details
- NPI number
- 1720650211
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
4 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
33 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) |
|---|---|---|
| Psychotherapy, 45 Minutes90834 | 19 | $91 |
| Psychiatric Diagnostic Evaluation90791 | 14 | $149 |
Typical Medicare-allowed amounts for these services range $91–$149 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2021-07-14
- Last updated
- 2021-10-08
- Certified
- 2021-10-08
Frequently asked questions
- What is Gregory Berlin's NPI number?
- Gregory Berlin's National Provider Identifier (NPI) is 1720650211, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Berlin's specialty?
- Gregory Berlin is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Gregory Berlin located?
- Gregory Berlin's practice location on file with NPPES is 55 Holly Hill Ln, Greenwich, CT 06830-6074.
- What is Gregory Berlin's phone number?
- The practice phone number listed in the NPPES registry for Gregory Berlin is (203) 863-2939.
- Is Gregory Berlin's NPI active?
- Yes — Gregory Berlin's NPI (1720650211) is active in the NPPES registry as of the last update on 2021-10-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.