Clifford Issacoff, PH D
NPI 1750300844 · Clinical Psychologist · East Islip, NY
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Clifford Issacoff, PH D is a Clinical Psychologist provider in East Islip, NY (NPI 1750300844).
Provider details
- NPI number
- 1750300844
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH D
- Sex
- Male
- Sole proprietor
- Yes
- License
- 009286 (NY)
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
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
914 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 | 777 | $113 |
| Psychotherapy, 1 Hour90837 | 46 | $166 |
| Evaluation of Psychological Test, Each Additional Hour96131 | 38 | $93 |
| Psychiatric Diagnostic Evaluation90791 | 28 | $188 |
| Evaluation of Psychological Test, First Hour96130 | 25 | $132 |
Typical Medicare-allowed amounts for these services range $93–$188 (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
- 2006-07-19
- Last updated
- 2010-11-17
Frequently asked questions
- What is Clifford Issacoff's NPI number?
- Clifford Issacoff's National Provider Identifier (NPI) is 1750300844, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Clifford Issacoff's specialty?
- Clifford Issacoff is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Clifford Issacoff located?
- Clifford Issacoff's practice location on file with NPPES is 126 E Main St, East Islip, NY 11730-2600.
- What is Clifford Issacoff's phone number?
- The practice phone number listed in the NPPES registry for Clifford Issacoff is (631) 277-8367.
- Does Clifford Issacoff accept Medicare?
- Clifford Issacoff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Clifford Issacoff's NPI active?
- Yes — Clifford Issacoff's NPI (1750300844) is active in the NPPES registry as of the last update on 2010-11-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.