Peggy Matthews-Nilsen, LCSW-C
NPI 1366576910 · Clinical Social Worker · Bethesda, MD
Peggy Matthews-Nilsen, LCSW-C is a Clinical Social Worker provider in Bethesda, MD (NPI 1366576910).
Provider details
- NPI number
- 1366576910
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW-C
- Sex
- Female
- Sole proprietor
- Yes
- License
- 05263 (MD)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 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
- 2007-03-15
- Last updated
- 2007-07-08
Frequently asked questions
- What is Peggy Matthews-Nilsen's NPI number?
- Peggy Matthews-Nilsen's National Provider Identifier (NPI) is 1366576910, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peggy Matthews-Nilsen's specialty?
- Peggy Matthews-Nilsen is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Peggy Matthews-Nilsen located?
- Peggy Matthews-Nilsen's practice location on file with NPPES is 4622 Woodfield Rd, Bethesda, MD 20814-4044.
- What is Peggy Matthews-Nilsen's phone number?
- The practice phone number listed in the NPPES registry for Peggy Matthews-Nilsen is (301) 571-5191.
- Is Peggy Matthews-Nilsen's NPI active?
- Yes — Peggy Matthews-Nilsen's NPI (1366576910) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.