JOHN TERENCE TAN SO MD
NPI 1801924295
Internal Medicine in Downey, CA

Q: What is John Terence So's NPI number?

The NPI number for John Terence So is 1801924295. It was assigned to this individual provider in the NPPES registry on February 28, 2007.

Q: What is John Terence So's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Q: When was this NPI record last updated?

The NPPES record for John Terence So was last updated on November 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.

Active since February 28, 2007PECOS EnrolledAccepts Medicare Assignment

10441 LAKEWOOD BLVD STE AB, DOWNEY, CA 90241(562) 869-1070(562) 286-8777 Get Directions Write a Review

NPPES record last updated: November 29, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Nov 29, 2025, Mar 21, 2023, Sep 5, 2019 (3 updates tracked since 2019).

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About John Terence Tan So Md NPPES

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

JOHN TERENCE TAN SO MD (NPI 1801924295) is an individual internal medicine provider in Downey, California, licensed in California (A98802) and active in the NPI registry since February 2007. He is enrolled in Medicare PECOS and is a graduate of Other (1999).

NPPES Registry Identity

NPI1801924295

Entity TypeIndividualMale

Primary Taxonomy207R00000X

Provider Legal NameJOHN TERENCE TAN SOCredential: MD

Location Address10441 LAKEWOOD BLVD STE ABDowney, CA 90241-2744

Mailing AddressPo Box 35380Las Vegas, NV 89133-5380 · (702) 579-3203

Phone(562) 869-1070

Fax(562) 286-8777

Sole ProprietorNo

Medical School CMSOtherGraduated 1999

Enumeration DateFebruary 28, 2007

Last NPPES UpdateNovember 29, 20253 updates tracked since enumeration

NPPES CertifiedNovember 29, 2025

✔ NPI 1801924295 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

License✔ Licensed in CA · A98802

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

10441 LAKEWOOD BLVD STE AB, Downey, CA 90241

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Other Identifiers 1

OtherA98802CA · Medical License

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

John Terence Tan So Md 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 ID446345011

PECOS Enrollment IDI20070927000959

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 90241 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 19

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

DR. RAJ BALASUNDARAM M.D.

Internal Medicine