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DR. ELIZABETH TIEN M.D.
NPI 1851554364
Psychiatry & Neurology - Child & Adolescent Psychiatry in Los Angeles, CA

Active since July 03, 2008PECOS EnrolledAccepts Medicare Assignment
1720 E 120TH ST, LOS ANGELES, CA 90059(310) 668-4272 Get Directions Write a Review

NPPES record last updated: July 11, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 11, 2022, Jul 2, 2019 (2 updates tracked since 2019).

About Dr. Elizabeth Tien M.d. NPPES

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

DR. ELIZABETH TIEN M.D. (NPI 1851554364) is an individual child & adolescent psychiatry provider in Los Angeles, California, licensed in California (170465) and active in the NPI registry since July 2008. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2006).

NPPES Registry Identity

NPI1851554364
Entity TypeIndividualFemale
Primary Taxonomy2084P0804X
Provider Legal NameDR. ELIZABETH TIENCredential: M.D.
Location Address1720 E 120TH STLos Angeles, CA 90059-3052
Mailing Address1720 E 120th StLos Angeles, CA 90059-3052
Phone(310) 668-4272
Sole ProprietorYes
Medical School CMSOtherGraduated 2006
Enumeration DateJuly 3, 2008
Last NPPES UpdateJuly 11, 20222 updates tracked since enumeration
NPPES CertifiedJuly 11, 2022
✔ NPI 1851554364 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · Child & Adolescent PsychiatryAllopathic & Osteopathic Physicians
Taxonomy Code2084P0804X
Licenses✔ Licensed in CA · 170465✔ Licensed in NY · 256438
Definition
Child & Adolescent Psychiatry is a subspecialty of psychiatry with additional skills and training in the diagnosis and treatment of developmental, behavioral, emotional, and mental disorders of childhood and adolescence.
1720 E 120TH ST, Los Angeles, CA 90059
Open in Google Maps ↗

Secondary Practice Locations 2

Location 1577 1st AveNew York, NY 10016-6404 · Phone (212) 263-6622
Location 2268 Canal StNew York, NY 10013-3599 · Phone (212) 941-2213 · Fax (212) 941-2180

Other Identifiers 1

Medicaid03477176NY

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Elizabeth Tien M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID6406012376
PECOS Enrollment IDI20220823002369
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

3

Medicare enrollment records show Elizabeth Tien reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Los Angeles County Department Of Mental Health
Same address
Mental Health (Including Community Mental Health Center)
1720 E 120TH ST
Los Angeles, CA 90059
  • Reassigned Medicare billing, California enrollment
  • 533 clinicians in this Medicare group
NPI 1528427184 (323) 298-3680
Maimonides Department Of Psychiatry Fpp
2,455 mi
Psychiatry
4802 10TH AVE
Brooklyn, NY 11219
  • Reassigned Medicare billing, New York enrollment
  • 94 clinicians in this Medicare group
NPI 1376656710 (718) 283-8773
Maimonides Faculty Practice Plan
2,455 mi
Internal Medicine
4802 10TH AVE
Brooklyn, NY 11219
  • Reassigned Medicare billing, New York enrollment
  • 1,177 clinicians in this Medicare group
NPI 1053344846 (718) 283-8700

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

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.

LUCY S VILLEGAS
Social Worker (Clinical)
1720 E 120TH ST
LOS ANGELES, CA 90059
Los Angeles County (310) 668-3201
RICHARD JAMES TAYLOR
Community Health Worker
1720 E 120TH ST
LOS ANGELES, CA 90059
Los Angeles County (310) 668-5150
ANGEL JONATHAN BAEZ
Community Health Worker
1720 E 120TH ST
LOS ANGELES, CA 90059
Los Angeles County (562) 837-5137
MR. ROY DEAN KING LCSW
Social Worker (Clinical)
1720 E 120TH ST
LOS ANGELES, CA 90059
Los Angeles County (310) 668-4371
DR. MARYAM HASHEMI M.D.
Psychiatry & Neurology (Psychiatry)
1720 E 120TH ST
LOS ANGELES, CA 90059
Los Angeles County (310) 668-4272
MR. FERNANDO MALLORY
Student in an Organized Health Care Education/Training Program
1720 E 120TH ST
LOS ANGELES, CA 90059
Los Angeles County (310) 668-4272
ASHLEY ALEXANDRA WHITE
Social Worker (Clinical)
1720 E 120TH ST
LOS ANGELES, CA 90059
Los Angeles County (323) 298-3680
MONICA UTOM
Nurse Practitioner (Psychiatric/Mental Health)
1720 E 120TH ST
LOS ANGELES, CA 90059
Los Angeles County (424) 338-2555

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 Elizabeth Tien's NPI number?

The NPI number for Elizabeth Tien is 1851554364. It was assigned to this individual provider in the NPPES registry on July 3, 2008.

Where is Elizabeth Tien located?

Elizabeth Tien practices at 1720 E 120th St, Los Angeles, CA 90059. The listed phone number is (310) 668-4272.

What is Elizabeth Tien's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Child & Adolescent Psychiatry, with taxonomy code 2084P0804X.

Is Elizabeth Tien enrolled in Medicare?

Yes. Elizabeth Tien is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Elizabeth Tien's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Elizabeth Tien reassigns Medicare benefits to 3 organizations: Los Angeles County Department Of Mental Health (Los Angeles, CA), Maimonides Department Of Psychiatry Fpp (Brooklyn, NY) and Maimonides Faculty Practice Plan (Brooklyn, NY). 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 Elizabeth Tien'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 Elizabeth Tien was last updated on July 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.