Karen Duffy, MFTI
NPI 1144551789 · Marriage & Family Therapist · Petaluma, CA
Karen Duffy, MFTI is a Marriage & Family Therapist provider in Petaluma, CA (NPI 1144551789).
Provider details
- NPI number
- 1144551789
- Entity type
- Individual
- Primary specialty
- Marriage & Family TherapistBehavioral Health & Social Service Providers
- Credential
- MFTI
- Sex
- Female
- Sole proprietor
- No
- License
- IMF51997 (CA)
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
16 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
- 2010-01-21
- Last updated
- 2010-01-21
Frequently asked questions
- What is Karen Duffy's NPI number?
- Karen Duffy's National Provider Identifier (NPI) is 1144551789, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Karen Duffy's specialty?
- Karen Duffy is listed in the NPPES registry with a primary specialty of Marriage & Family Therapist (Behavioral Health & Social Service Providers).
- Where is Karen Duffy located?
- Karen Duffy's practice location on file with NPPES is 1500 Petaluma Blvd S, Petaluma, CA 94952-5545.
- What is Karen Duffy's phone number?
- The practice phone number listed in the NPPES registry for Karen Duffy is (707) 765-8488.
- Is Karen Duffy's NPI active?
- Yes — Karen Duffy's NPI (1144551789) is active in the NPPES registry as of the last update on 2010-01-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.