Lissa Grossman, LCSW
NPI 1548858848 · Mental Health Counselor · Norwalk, CT
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lissa Grossman, LCSW is a Mental Health Counselor provider in Norwalk, CT (NPI 1548858848).
Provider details
- NPI number
- 1548858848
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- Yes
- License
- 17214 (NY)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
5 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
592 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, 30 Minutes90832 | 517 | $60 |
| Group Psychotherapy90853 | 51 | $21 |
| Psychiatric Diagnostic Evaluation90791 | 24 | $132 |
Typical Medicare-allowed amounts for these services range $21–$132 (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
- 2021-01-04
- Last updated
- 2021-01-04
- Certified
- 2021-01-04
Frequently asked questions
- What is Lissa Grossman's NPI number?
- Lissa Grossman's National Provider Identifier (NPI) is 1548858848, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lissa Grossman's specialty?
- Lissa Grossman is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Lissa Grossman located?
- Lissa Grossman's practice location on file with NPPES is 77 Sunrise Hill Rd, Norwalk, CT 06851-2113.
- What is Lissa Grossman's phone number?
- The practice phone number listed in the NPPES registry for Lissa Grossman is (917) 658-9589.
- Does Lissa Grossman accept Medicare?
- Lissa Grossman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lissa Grossman's NPI active?
- Yes — Lissa Grossman's NPI (1548858848) is active in the NPPES registry as of the last update on 2021-01-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.