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DR. ALEXANDER NGUYEN ALI MALEKZADEH D.O.
NPI 1669799680
Psychiatry & Neurology - Psychiatry in Pleasant Hill, CA

Active since April 29, 2010PECOS Enrolled
2120 CONTRA COSTA BLVD # 1164, PLEASANT HILL, CA 94523(925) 233-6931 Get Directions Write a Review

NPPES record last updated: November 5, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Nov 5, 2024, Oct 3, 2024, Jun 22, 2023 and 1 more (4 updates tracked since 2021).

About Dr. Alexander Nguyen Ali Malekzadeh D.o. NPPES

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

DR. ALEXANDER NGUYEN ALI MALEKZADEH D.O. (NPI 1669799680) is an individual psychiatry provider in Pleasant Hill, California, licensed in California (20A13830) and active in the NPI registry since April 2010. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1669799680
Entity TypeIndividualMale
Primary Taxonomy2084P0800X
Provider Legal NameDR. ALEXANDER NGUYEN ALI MALEKZADEHCredential: D.O.
Location Address2120 CONTRA COSTA BLVD # 1164Pleasant Hill, CA 94523-3742
Mailing Address2120 Contra Costa Blvd # 1164Pleasant Hill, CA 94523-3742 · (925) 233-6931
Phone(925) 233-6931
Sole ProprietorYes
Enumeration DateApril 29, 2010
Last NPPES UpdateNovember 5, 20244 updates tracked since enumeration
NPPES CertifiedNovember 5, 2024
✔ NPI 1669799680 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0800X
Licenses✔ Licensed in CA · 20A13830✔ Licensed in CA · 13830
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.
2120 CONTRA COSTA BLVD # 1164, Pleasant Hill, CA 94523
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Alexander Nguyen Ali Malekzadeh D.o. 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.

Medicare Billing Reassignments

4

Medicare enrollment records show Alexander Malekzadeh reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Bay Psychiatric Associates
13 mi
Psychiatry
2020 MILVIA ST STE 440
Berkeley, CA 94704
  • Reassigned Medicare billing, California enrollment
  • 116 clinicians in this Medicare group
NPI 1427163229 (510) 204-4635
Permanente Medical Group Inc
16 mi
Internal Medicine
975 SERENO DRIVE
Vallejo, CA 94589
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1336222397 (707) 651-1000
Mindful Health Solutions A Professional Medical Corporation
22 mi
Psychiatry
360 POST ST STE 500
San Francisco, CA 94108
  • Reassigned Medicare billing, California enrollment
  • 118 clinicians in this Medicare group
NPI 1881894483 (844) 867-8444
Brightside Medical, P.C.
25 mi
Psychiatry
5214F DIAMOND HEIGHTS BLVD # 345
San Francisco, CA 94131
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Brightside Medical PC
  • 63 clinicians in this Medicare group
NPI 1801355482 (415) 360-3348

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
23 services13 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94523 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.

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 Alexander Malekzadeh's NPI number?

The NPI number for Alexander Malekzadeh is 1669799680. It was assigned to this individual provider in the NPPES registry on April 29, 2010.

Where is Alexander Malekzadeh located?

Alexander Malekzadeh practices at 2120 Contra Costa Blvd # 1164, Pleasant Hill, CA 94523. The listed phone number is (925) 233-6931.

What is Alexander Malekzadeh's specialty?

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

Is Alexander Malekzadeh enrolled in Medicare?

Yes. Alexander Malekzadeh is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Alexander Malekzadeh's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexander Malekzadeh reassigns Medicare benefits to 4 organizations: Bay Psychiatric Associates (Berkeley, CA), Permanente Medical Group Inc (Vallejo, CA), Mindful Health Solutions A Professional Medical Corporation (San Francisco, CA) and Brightside Medical, P.C. (San Francisco, CA). Each 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 Alexander Malekzadeh'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 Alexander Malekzadeh was last updated on November 5, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 23 months 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.