Margaret Larsen Mathews, MS. CCC- SLP
NPI 1538429642 · Speech-Language Pathologist · Shelter Island, NY
Margaret Larsen Mathews, MS. CCC- SLP is a Speech-Language Pathologist provider in Shelter Island, NY (NPI 1538429642).
Provider details
- NPI number
- 1538429642
- Entity type
- Individual
- Primary specialty
- Speech-Language PathologistSpeech, Language and Hearing Service Providers
- Credential
- MS. CCC- SLP
- Sex
- Female
- Sole proprietor
- Yes
- License
- 1292 (WV)
Specialties & taxonomies
Speech, Language and Hearing Service Providers
Speech, Language and Hearing Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-05-22
- Last updated
- 2013-05-29
Frequently asked questions
- What is Margaret Larsen Mathews's NPI number?
- Margaret Larsen Mathews's National Provider Identifier (NPI) is 1538429642, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Larsen Mathews's specialty?
- Margaret Larsen Mathews is listed in the NPPES registry with a primary specialty of Speech-Language Pathologist (Speech, Language and Hearing Service Providers).
- Where is Margaret Larsen Mathews located?
- Margaret Larsen Mathews's practice location on file with NPPES is 125 Midway Rd, Shelter Island, NY 11964.
- What is Margaret Larsen Mathews's phone number?
- The practice phone number listed in the NPPES registry for Margaret Larsen Mathews is (978) 551-1215.
- Is Margaret Larsen Mathews's NPI active?
- Yes — Margaret Larsen Mathews's NPI (1538429642) is active in the NPPES registry as of the last update on 2013-05-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.