Megan Collins Williamson, LICSW
NPI 1255889184 · Clinical Social Worker · Holyoke, MA
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Megan Collins Williamson, LICSW is a Clinical Social Worker provider in Holyoke, MA (NPI 1255889184).
Provider details
- NPI number
- 1255889184
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LICSW
- Sex
- Female
- Sole proprietor
- No
- License
- 122537 (MA)
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
9 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
287 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 | 287 | $73 |
Typical Medicare-allowed amounts for these services range $73–$73 (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
- 2016-09-20
- Last updated
- 2026-05-29
- Certified
- 2026-05-29
Frequently asked questions
- What is Megan Collins Williamson's NPI number?
- Megan Collins Williamson's National Provider Identifier (NPI) is 1255889184, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Megan Collins Williamson's specialty?
- Megan Collins Williamson is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Megan Collins Williamson located?
- Megan Collins Williamson's practice location on file with NPPES is 98 Lower Westfield Rd, Holyoke, MA 01040-9403.
- What is Megan Collins Williamson's phone number?
- The practice phone number listed in the NPPES registry for Megan Collins Williamson is (413) 533-5201.
- Does Megan Collins Williamson accept Medicare?
- Megan Collins Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Megan Collins Williamson's NPI active?
- Yes — Megan Collins Williamson's NPI (1255889184) is active in the NPPES registry as of the last update on 2026-05-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.