Lawrence Greenstein, LCSW
NPI 1447688635 · Clinical Social Worker · Trenton, NJ
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lawrence Greenstein, LCSW is a Clinical Social Worker provider in Trenton, NJ (NPI 1447688635).
Provider details
- NPI number
- 1447688635
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Male
- Sole proprietor
- No
- License
- 44SC05586900 (NJ)
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
12 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
5,614 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 | 3,996 | $80 |
| Psychotherapy, 30 Minutes90832 | 1,017 | $61 |
| Family Psychotherapy With Patient, 50 Minutes90847 | 545 | $79 |
| Group Psychotherapy90853 | 42 | $21 |
| Psychiatric Diagnostic Evaluation90791 | 14 | $134 |
Typical Medicare-allowed amounts for these services range $21–$134 (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
- 2013-10-24
- Last updated
- 2026-01-29
- Certified
- 2026-01-29
Frequently asked questions
- What is Lawrence Greenstein's NPI number?
- Lawrence Greenstein's National Provider Identifier (NPI) is 1447688635, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lawrence Greenstein's specialty?
- Lawrence Greenstein is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Lawrence Greenstein located?
- Lawrence Greenstein's practice location on file with NPPES is 635 S Clinton Ave, Trenton, NJ 08611-1831.
- What is Lawrence Greenstein's phone number?
- The practice phone number listed in the NPPES registry for Lawrence Greenstein is (609) 508-0638.
- Does Lawrence Greenstein accept Medicare?
- Lawrence Greenstein is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lawrence Greenstein's NPI active?
- Yes — Lawrence Greenstein's NPI (1447688635) is active in the NPPES registry as of the last update on 2026-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.