DR. JOSHUA J WILLIAMS (PSY.D.) – Clinical Psychologist, NPI 1285863613
Clinical Psychologist
Main info
Doctor Profile
Profile Insights
NPPES metrics only — not quality of care.
4,434 CLINICAL PSYCHOLOGIST in CA
Provider Addresses for DR. JOSHUA J WILLIAMS (PSY.D.)
31194 LA BAYA DR STE 100
WESTLAKE VILLAGE, CA 913626420
Phone: (805) 242-2429
Fax: (310) 870-7197
Type: Mailing
1014, South Westlake Boulevard, Westlake Village, Thousand Oaks, Ventura County, California, 91361, United States
STE 14-243
WESTLAKE VILLAGE, CA 913613108
Phone: (831) 277-0632
Type: Mailing
NPPES updates history
No NPPES updates recorded for this provider.
Prescription Activity
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Open Payments (CMS)
No Open Payments data available for this provider.
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Medicare Enrollment & Revalidation
Source: CMS public data · Not endorsed by CMS ·
Educational use only—not medical, billing, or legal advice.
PECOS enrollment status
Participating (accepts Medicare assignment)
Enrollment effective: 2012-10-22
PECOS data refreshed: 2026-05-27
Medicare revalidation (CMS due date list)
Due date not assigned yet
CMS is tracking this Medicare enrollment for revalidation, but has not published a due date.
Enrollment records
1
Earliest due date
Not assigned (TBD)
CMS data updated
2026-06-01
Revalidation progress
- Medicare enrolled
- On CMS revalidation list
- Due date assigned
- Revalidate in PECOS
CMS enrollment records
| Enrollment ID | Type | Specialty | State | Due date |
|---|---|---|---|---|
| I20121022000421 | I | Clinical Psychologist | CA | TBD |
What to do next
- No action required while the due date shows TBD.
- Check the CMS Revalidation Lookup Tool periodically — CMS updates the list about every 60 days.
- Do not submit a revalidation application in PECOS until CMS publishes a concrete due date.
Prepare CMS-855 application → · Look up this NPI in PECOS → · Verify on CMS PECOS
Medicare Utilization (FFS)
Source: CMS public data · Not endorsed by CMS · Beneficiary counts under 11 are suppressed in source data ·
Educational use only—not medical, billing, or legal advice.
Top Medicare procedures (2023) · refreshed 2026-05-27
| HCPCS | Description | Services | Beneficiaries | Medicare allowed |
|---|---|---|---|---|
| 90785 | Psychiatric services complicated by communication factor | 248 | 93 | $0 |
| 90832 | Psychotherapy, 30 minutes | 218 | 105 | $0 |
| 99484 | Care management services for behavioral health conditions, 20 minutes or more clinical staff time directed by health care professional | 126 | 75 | $0 |
| 90791 | Psychiatric diagnostic evaluation | 118 | 118 | $0 |
Insurance plans in this area (ZIP 91362)
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Group practice members
| Name | Specialty | State |
|---|---|---|
| Clinical Psychologist | CA | |
| Clinical Psychologist | CA | |
| Clinical Psychologist | CA | |
| - | CA | |
| Clinical Psychologist | CA | |
| Clinical Psychologist | CA | |
| Clinical Psychologist | CA | |
| Clinical Psychologist | CA | |
| Clinical Psychologist | CA | |
| Clinical Psychologist | CA |
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