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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.

JAMES AMSTER M.D.
NPI 1366491623
Radiology - Neuroradiology in Signal Hill, CA

Active since May 06, 2006
91.24/100
CMS Quality Rating
2708 E WILLOW ST, SIGNAL HILL, CA 90755(562) 216-5120(562) 216-5121 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About James Amster M.d. NPPES

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

JAMES AMSTER M.D. (NPI 1366491623) is an individual neuroradiology provider in Signal Hill, California, licensed in California (G49317) and active in the NPI registry since May 2006.

NPPES Registry Identity

NPI1366491623
Entity TypeIndividualMale
Primary Taxonomy2085N0700X
Provider Legal NameJAMES AMSTERCredential: M.D.
Location Address2708 E WILLOW STSignal Hill, CA 90755-2217
Mailing Address2708 E Willow StSignal Hill, CA 90755-2217 · (562) 216-5120 · Fax (562) 216-5121
Phone(562) 216-5120
Fax(562) 216-5121
Sole ProprietorNo
Enumeration DateMay 6, 2006
Last NPPES UpdateJuly 13, 2026
✔ NPI 1366491623 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyRadiology · NeuroradiologyAllopathic & Osteopathic Physicians
Taxonomy Code2085N0700X
License✔ Licensed in CA · G49317
Definition
A radiologist who diagnoses and treats diseases utilizing imaging procedures as they relate to the brain, spine and spinal cord, head, neck and organs of special sense in adults and children.
2708 E WILLOW ST, Signal Hill, CA 90755
Open in Google Maps ↗

Other Identifiers 1

OtherG49317CA · Medical License

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

91.24/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality75
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 6

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

JEFFREY A DOBKIN MD
Radiology (Nuclear Radiology)
2708 E WILLOW ST
SIGNAL HILL, CA 90755
Los Angeles County (562) 427-0714
JEFFREY A. DOBKIN, INC.
Radiology (Nuclear Radiology)
2708 E WILLOW ST
SIGNAL HILL, CA 90755
Los Angeles County (562) 427-0714
KAY YAN M.D.
Radiology (Diagnostic Radiology)
2708 E WILLOW ST
SIGNAL HILL, CA 90755
Los Angeles County (562) 216-5120
VISTA RADIOLOGY MEDICAL ASSOCIATES, INC.
Radiology (Diagnostic Radiology)
2708 E WILLOW ST
SIGNAL HILL, CA 90755
Los Angeles County (562) 216-5120
LONG BEACH PET IMAGING CENTER LLC
Clinic/Center (Radiology)
2708 E WILLOW ST
SIGNAL HILL, CA 90755
Los Angeles County (562) 427-3652
LPMI LONG BEACH, PC
Radiology (Diagnostic Radiology)
2708 E WILLOW ST
SIGNAL HILL, CA 90755
Los Angeles County (562) 216-5120

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 James Amster's NPI number?

The NPI number for James Amster is 1366491623. It was assigned to this individual provider in the NPPES registry on May 6, 2006.

Where is James Amster located?

James Amster practices at 2708 E Willow St, Signal Hill, CA 90755. The listed phone number is (562) 216-5120.

What is James Amster's specialty?

The primary specialty registered for this NPI is Radiology, specializing in Neuroradiology, with taxonomy code 2085N0700X.

When was this NPI record last updated?

The NPPES record for James Amster 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 32 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.