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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DR. DENNIS S WEISS M.D.
NPI 1427021203
Psychiatry & Neurology - Psychiatry in Berkeley, CA

Active since February 10, 2006PECOS Enrolled
2340 WARD ST, 101, BERKELEY, CA 94705(510) 848-5308 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Dennis S Weiss M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. DENNIS S WEISS M.D. (NPI 1427021203) is an individual psychiatry provider in Berkeley, California, licensed in California (G17751) and active in the NPI registry since February 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1427021203
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. DENNIS S WEISSCredential: M.D.
Location Address2340 WARD ST, 101Berkeley, CA 94705-1124
Mailing Address2340 Ward St, 101Berkeley, CA 94705-1124 · (510) 848-5308
Phone(510) 848-5308
Sole ProprietorNo
Enumeration DateFebruary 10, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1427021203 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
License✔ Licensed in CA · G17751
Definition
A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.
2340 WARD ST, Berkeley, CA 94705
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Other Identifiers 1

OtherG17751CA · Insurance Provider Number

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Dennis S Weiss M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer– Part B Labs & Imaging✔ Durable Medical Equipment– Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94705 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$202.35 typical visit price
range $69.00 – $202.35
Typical copayment $50.58 (range $17.25 – $50.58)
Most-billed visit code 99205
Established Patient
$84.91 typical visit price
range $23.44 – $166.46
Typical copayment $21.22 (range $5.86 – $41.61)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DEEAHNA MARIE LORENZ PH.D.
Psychologist (Clinical)
2340 WARD ST, SUITE 107
BERKELEY, CA 94705
Alameda County (510) 528-2228
DENNI LIEBOWITZ LCSW
Social Worker (Clinical)
2340 WARD ST, SUITE 202
BERKELEY, CA 94705
Alameda County (510) 549-2945
DR. LUCIA A MILBURN PH.D
Psychologist (Clinical)
2340 WARD ST, SUITE #105
BERKELEY, CA 94705
Alameda County (510) 540-5138
DR. CAROLE ANNE PETIET PHD
Psychologist (Clinical)
2340 WARD ST, SUITE 105
BERKELEY, CA 94705
Alameda County (510) 843-6760
ISABELLE EVELYNE STIERLI PH.D.
Psychologist (Adult Development & Aging)
2340 WARD ST, 201
BERKELEY, CA 94705
Alameda County (510) 869-3744
RACHELLE AIELLO LMFT
Marriage & Family Therapist
2340 WARD ST
BERKELEY, CA 94705
Alameda County (510) 560-4492
MS. ALEXANDRA M. ELITE LCSW
Social Worker (Clinical)
2340 WARD ST, SUITE 201
BERKELEY, CA 94705
Alameda County (415) 793-3296
MEGAN LEAH MACMILLAN LMFT
Marriage & Family Therapist
2340 WARD ST, SUITE 204
BERKELEY, CA 94705
Alameda County (510) 647-8971

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 Dennis Weiss's NPI number?

The NPI number for Dennis Weiss is 1427021203. It was assigned to this individual provider in the NPPES registry on February 10, 2006.

Where is Dennis Weiss located?

Dennis Weiss practices at 2340 Ward St 101, Berkeley, CA 94705. The listed phone number is (510) 848-5308.

What is Dennis Weiss's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is Dennis Weiss enrolled in Medicare?

Yes. Dennis Weiss is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Dennis Weiss was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 26 days 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.