Merrill Groff, LCSW-C
NPI 1578101358 · Clinical Social Worker · Gaithersburg, MD
Enrolled with Medicare as Practitioner - Clinical Social Worker · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Merrill Groff, LCSW-C is a Clinical Social Worker provider in Gaithersburg, MD (NPI 1578101358).
Provider details
- NPI number
- 1578101358
- Entity type
- Individual
- Primary specialty
- Clinical Social WorkerBehavioral Health & Social Service Providers
- Credential
- LCSW-C
- Sex
- Female
- Sole proprietor
- No
- License
- 904019628 (VA)
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 tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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
Additional practice locations (1)
- 17904 Georgia Ave Ste 200Olney, MD 20832-2277Phone: (240) 304-3327
Registry dates
- Enumerated
- 2019-12-12
- Last updated
- 2026-03-04
- Certified
- 2026-03-04
Frequently asked questions
- What is Merrill Groff's NPI number?
- Merrill Groff's National Provider Identifier (NPI) is 1578101358, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Merrill Groff's specialty?
- Merrill Groff is listed in the NPPES registry with a primary specialty of Clinical Social Worker (Behavioral Health & Social Service Providers).
- Where is Merrill Groff located?
- Merrill Groff's practice location on file with NPPES is 9711 Washingtonian Blvd Ste 550, Gaithersburg, MD 20878-5789.
- What is Merrill Groff's phone number?
- The practice phone number listed in the NPPES registry for Merrill Groff is (240) 207-1793.
- Does Merrill Groff accept Medicare?
- Merrill Groff is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Merrill Groff's NPI active?
- Yes — Merrill Groff's NPI (1578101358) is active in the NPPES registry as of the last update on 2026-03-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.