Havalyn Merritt, LCSW
NPI 1154503092 · Mental Health Counselor · Mill Valley, CA
Havalyn Merritt, LCSW is a Mental Health Counselor provider in Mill Valley, CA (NPI 1154503092).
Provider details
- NPI number
- 1154503092
- Entity type
- Individual
- Primary specialty
- Mental Health CounselorBehavioral Health & Social Service Providers
- Credential
- LCSW
- Sex
- Female
- Sole proprietor
- No
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
18 yrs in NPPES registry
- Profile completeness38% of score
83% 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)
- 629 Oakland AveOakland, CA 94611-4567Phone: (510) 318-6137
Registry dates
- Enumerated
- 2007-12-03
- Last updated
- 2019-03-13
Frequently asked questions
- What is Havalyn Merritt's NPI number?
- Havalyn Merritt's National Provider Identifier (NPI) is 1154503092, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Havalyn Merritt's specialty?
- Havalyn Merritt is listed in the NPPES registry with a primary specialty of Mental Health Counselor (Behavioral Health & Social Service Providers).
- Where is Havalyn Merritt located?
- Havalyn Merritt's practice location on file with NPPES is 240 Miller Ave, Mill Valley, CA 94941-2858.
- What is Havalyn Merritt's phone number?
- The practice phone number listed in the NPPES registry for Havalyn Merritt is (415) 693-8801.
- Is Havalyn Merritt's NPI active?
- Yes — Havalyn Merritt's NPI (1154503092) is active in the NPPES registry as of the last update on 2019-03-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.