Stacy Duffy, PSY.D.
NPI 1013167022 · Clinical Psychologist · Palo Alto, CA
Stacy Duffy, PSY.D. is a Clinical Psychologist provider in Palo Alto, CA (NPI 1013167022).
Provider details
- NPI number
- 1013167022
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D.
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Behavioral Health & Social Service Providers
- Mental Health Counselor101YM0800X
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
17 yrs in NPPES registry
- Profile completeness38% of score
83% 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
- 2008-09-26
- Last updated
- 2017-04-14
Frequently asked questions
- What is Stacy Duffy's NPI number?
- Stacy Duffy's National Provider Identifier (NPI) is 1013167022, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stacy Duffy's specialty?
- Stacy Duffy is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Stacy Duffy located?
- Stacy Duffy's practice location on file with NPPES is 555 Middlefield Rd # 210, Palo Alto, CA 94301-2124.
- What is Stacy Duffy's phone number?
- The practice phone number listed in the NPPES registry for Stacy Duffy is (650) 485-3812.
- Is Stacy Duffy's NPI active?
- Yes — Stacy Duffy's NPI (1013167022) is active in the NPPES registry as of the last update on 2017-04-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.