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.

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Clifford Issacoff, PH D

NPI 1750300844 · Clinical Psychologist · East Islip, NY

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)

Practice location

126 E Main St

Suite 1

East Islip, NY 11730-2600

Phone: (631) 277-8367

Fax: (631) 277-3140

Street-level locationGet directions

More NY providers

Mailing address

Po Box 254

Islip Terrace, NY 11752-0254

Specialties & taxonomies

Clinical PsychologistPrimary103TC0700XLicense 009286 (NY)
Behavioral Health & Social Service Providers

Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Detailed profile(90/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure28% of score
20 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.

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.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider does (Medicare)

Registry dates

Frequently asked questions

Specialties & taxonomies

Frequently asked questions

Profile Score

What this provider does (Medicare)