CATHERINE FAN DIONISIO PH.D.
NPI 1730365248
Psychologist - Clinical in Walnut Creek, CA
About Catherine Fan Dionisio Ph.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CATHERINE FAN DIONISIO PH.D. (NPI 1730365248) is an individual clinical provider in Walnut Creek, California, licensed in California (PSY26492) and active in the NPI registry since January 2008. She is enrolled in Medicare PECOS and maintains a secondary practice location in Ann Arbor.
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
Secondary Practice Location 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Catherine Fan Dionisio Ph.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Catherine Dionisio reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Richmond, CA 94801
- Reassigned Medicare billing, California enrollment
- 20,078 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 94596 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 10
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WALNUT CREEK, CA 94596
WALNUT CREEK, CA 94596
WALNUT CREEK, CA 94596
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Catherine Dionisio's NPI number?
The NPI number for Catherine Dionisio is 1730365248. It was assigned to this individual provider in the NPPES registry on January 15, 2008. The provider is also known as Catherine Kay Fan.
Where is Catherine Dionisio located?
Catherine Dionisio practices at 710 S Broadway Ste 300, Walnut Creek, CA 94596. The listed phone number is (925) 295-4145.
What is Catherine Dionisio's specialty?
The primary specialty registered for this NPI is Psychologist, specializing in Clinical, with taxonomy code 103TC0700X.
Is Catherine Dionisio enrolled in Medicare?
Yes. Catherine Dionisio is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Catherine Dionisio's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Catherine Dionisio reassigns Medicare benefits to Permanente Medical Group Inc (Richmond, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Catherine Dionisio's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Catherine Dionisio was last updated on January 11, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Catherine Fan Dionisio, PH.D. · NPI 1730365248
Clinical provider in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since January 15, 2008.
## Identity
- **NPI:** 1730365248 (Entity type: Individual)
- **Enumerated:** January 15, 2008
- **Primary specialty:** Psychologist - Clinical · taxonomy 103TC0700X
- **State license:** PSY26492 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 710 S BROADWAY STE 300, Walnut Creek, CA 94596-5229
- **Phone:** (925) 295-4145
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment
- **Bills Medicare through:** Permanente Medical Group Inc (NPI 1235226531, Richmond, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 11, 2022
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Source: [NPI Profile](https://npiprofile.com/npi/1730365248) · Data from the CMS NPPES public registry.