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ROBERT JAMES TAMAI
NPI 1538525001
Internal Medicine - Gastroenterology in West Hills, CA

Active since January 13, 2016PECOS EnrolledAccepts Medicare Assignment
7345 MEDICAL CENTER DR STE 420, WEST HILLS, CA 91307(818) 340-8252 Get Directions Write a Review

NPPES record last updated: August 29, 2025. Verified against the NPPES registry weekly; last sync: September 06, 2026.

Record update history: Jul 1, 2025, Apr 9, 2020, Jan 13, 2016 (3 updates tracked since 2016).

About Robert James Tamai NPPES

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

ROBERT JAMES TAMAI (NPI 1538525001) is an individual gastroenterology provider in West Hills, California, licensed in California (A164258) and active in the NPI registry since January 2016. He is enrolled in Medicare PECOS and is a graduate of Johns Hopkins University School Of Medicine (2018).

NPPES Registry Identity

NPI1538525001
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameROBERT JAMES TAMAI
Location Address7345 MEDICAL CENTER DR STE 420West Hills, CA 91307-1964
Mailing Address5767 W Century Blvd Ste 400Los Angeles, CA 90045-5631 · (310) 301-8707
Phone(818) 340-8252
Sole ProprietorNo
Medical School CMSJohns Hopkins University School Of MedicineGraduated 2018
Enumeration DateJanuary 13, 2016
Last NPPES UpdateAugust 29, 20253 updates tracked since enumeration
NPPES CertifiedAugust 29, 2025
✔ NPI 1538525001 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
License✔ Licensed in CA · A164258
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
7345 MEDICAL CENTER DR STE 420, West Hills, CA 91307
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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Robert James Tamai 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 ID5890024483
PECOS Enrollment IDI20250801002889
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 91307 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
$142.39 typical visit price
range $62.96 – $187.60
Typical copayment $35.59 (range $15.74 – $46.90)
Most-billed visit code 99204
Established Patient
$109.96 typical visit price
range $20.84 – $153.61
Typical copayment $27.49 (range $5.21 – $38.40)
Most-billed visit code 99214
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 5

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

LINA HADJ SMAINE DO
Family Medicine
7345 MEDICAL CENTER DR STE 420
WEST HILLS, CA 91307
Los Angeles County (818) 340-8252
LAURA KING DO
Family Medicine
7345 MEDICAL CENTER DR STE 420
WEST HILLS, CA 91307
Los Angeles County (818) 251-9750
DANNY ISSA MD
Internal Medicine (Gastroenterology)
7345 MEDICAL CENTER DR STE 420
WEST HILLS, CA 91307
Los Angeles County (818) 340-8252
DR. MONA REZAPOUR M.D.
Internal Medicine (Gastroenterology)
7345 MEDICAL CENTER DR STE 420
WEST HILLS, CA 91307
Los Angeles County (818) 340-8252
CRAIG RYAN GLUCKMAN MD
Internal Medicine (Gastroenterology)
7345 MEDICAL CENTER DR STE 420
WEST HILLS, CA 91307
Los Angeles County (818) 340-8252

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 Robert Tamai's NPI number?

The NPI number for Robert Tamai is 1538525001. It was assigned to this individual provider in the NPPES registry on January 13, 2016.

Where is Robert Tamai located?

Robert Tamai practices at 7345 Medical Center Dr Ste 420, West Hills, CA 91307. The listed phone number is (818) 340-8252.

What is Robert Tamai's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Robert Tamai enrolled in Medicare?

Yes. Robert Tamai 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.

When was this NPI record last updated?

The NPPES record for Robert Tamai was last updated on August 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.