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GREGORY ELBERT TONG M.D.
NPI 1871956359
Emergency Medicine in Los Angeles, CA

Active since April 01, 2016PECOS Enrolled
942 WESTWOOD BOULEVARD, SUITE 300, LOS ANGELES, CA 90024(310) 794-0585 Get Directions Write a Review

NPPES record last updated: March 13, 2024. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Nov 23, 2021, Sep 3, 2020, Jun 11, 2020 and 1 more (4 updates tracked since 2016).

About Gregory Elbert Tong M.d. NPPES

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

GREGORY ELBERT TONG M.D. (NPI 1871956359) is an individual emergency medicine provider in Los Angeles, California, licensed in California (A152777) and active in the NPI registry since April 2016. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1871956359
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameGREGORY ELBERT TONGCredential: M.D.
Location Address942 WESTWOOD BOULEVARD, SUITE 300Los Angeles, CA 90024
Mailing Address4712 Admiralty Way # 637Marina Del Rey, CA 90292-6905
Phone(310) 794-0585
Sole ProprietorYes
Enumeration DateApril 1, 2016
Last NPPES UpdateMarch 13, 20244 updates tracked since enumeration
NPPES CertifiedMarch 13, 2024
✔ NPI 1871956359 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in CA · A152777
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
942 WESTWOOD BOULEVARD, Los Angeles, CA 90024
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of Texas.Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Gregory Elbert Tong 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.

Medicare Billing Reassignments

3

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

Cep America - California
3.0 mi
Emergency Medicine
2121 SANTA MONICA BLVD
Santa Monica, CA 90404
  • Reassigned Medicare billing, California enrollment
  • 1,204 clinicians in this Medicare group
NPI 1063081545 (310) 829-5511
Southern California Permanente Medical Group
4.3 mi
Health Maintenance Organization
6041 CADILLAC AVE
Los Angeles, CA 90034
  • Reassigned Medicare billing, California enrollment
  • 13,921 clinicians in this Medicare group
NPI 1043242563 (323) 857-2000
Centinela Freeman Emergency Medical Associates, Inc.
9.6 mi
Emergency Medicine
555 E HARDY ST
Inglewood, CA 90301
  • Reassigned Medicare billing, California enrollment
  • 111 clinicians in this Medicare group
NPI 1528333101 (310) 379-2134

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.

Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
25 services25 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 90024 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
$96.36 typical visit price
range $62.96 – $187.60
Typical copayment $24.09 (range $15.74 – $46.90)
Most-billed visit code 99203
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.

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 Gregory Tong's NPI number?

The NPI number for Gregory Tong is 1871956359. It was assigned to this individual provider in the NPPES registry on April 1, 2016.

Where is Gregory Tong located?

Gregory Tong practices at 942 Westwood Boulevard Suite 300, Los Angeles, CA 90024. The listed phone number is (310) 794-0585.

What is Gregory Tong's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Gregory Tong enrolled in Medicare?

Yes. Gregory Tong is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Gregory Tong's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Tong reassigns Medicare benefits to 3 organizations: Cep America - California (Santa Monica, CA), Southern California Permanente Medical Group (Los Angeles, CA) and Centinela Freeman Emergency Medical Associates, Inc. (Inglewood, 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 Gregory Tong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Gregory Tong accept?

Health plans from Blue Cross and Blue Shield of Texas list Gregory Tong as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Gregory Tong was last updated on March 13, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.