Alexander Tong
NPI 1356804926 · Medical Oncology Physician · San Diego, CA
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexander Tong is a Medical Oncology Physician provider in San Diego, CA (NPI 1356804926).
Provider details
- NPI number
- 1356804926
- Entity type
- Individual
- Primary specialty
- Medical Oncology PhysicianAllopathic & Osteopathic Physicians
- Sex
- Male
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
7 yrs in NPPES registry
- Profile completeness33% of score
83% of core fields populated
- Practice footprint20% of score
3 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$125 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 3855 Health Sciences DrLa Jolla, CA 92093-1503Phone: (800) 926-8273Fax: (888) 539-8781
- 9300 Campus Point DrLa Jolla, CA 92037-1300Phone: (800) 926-8273Fax: (888) 539-8781
Registry dates
- Enumerated
- 2019-04-10
- Last updated
- 2026-05-12
- Certified
- 2026-05-12
Frequently asked questions
- What is Alexander Tong's NPI number?
- Alexander Tong's National Provider Identifier (NPI) is 1356804926, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexander Tong's specialty?
- Alexander Tong is listed in the NPPES registry with a primary specialty of Medical Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Alexander Tong located?
- Alexander Tong's practice location on file with NPPES is 200 W Arbor Dr, San Diego, CA 92103-9000.
- What is Alexander Tong's phone number?
- The practice phone number listed in the NPPES registry for Alexander Tong is (800) 926-8273.
- Does Alexander Tong accept Medicare?
- Alexander Tong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexander Tong's NPI active?
- Yes — Alexander Tong's NPI (1356804926) is active in the NPPES registry as of the last update on 2026-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.