DR. GEOFFREY YUK FUNG TSOI DO
NPI 1497100606
Family Medicine in Lancaster, CA

Q: What is Geoffrey Tsoi's NPI number?

The NPI number for Geoffrey Tsoi is 1497100606. It was assigned to this individual provider in the NPPES registry on April 26, 2016.

Q: What is Geoffrey Tsoi's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Q: When was this NPI record last updated?

The NPPES record for Geoffrey Tsoi was last updated on March 19, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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 April 26, 2016PECOS EnrolledAccepts Medicare Assignment

43322 GINGHAM AVE, LANCASTER, CA 93535(661) 874-4050 Get Directions Write a Review

NPPES record last updated: March 19, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Mar 19, 2026, Feb 5, 2026, Jan 26, 2021 and 2 more (5 updates tracked since 2019).

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About Dr. Geoffrey Yuk Fung Tsoi Do NPPES

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

DR. GEOFFREY YUK FUNG TSOI DO (NPI 1497100606) is an individual family medicine provider in Lancaster, California, licensed in California (20A17304) and active in the NPI registry since April 2016. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of Other (2016).

NPPES Registry Identity

NPI1497100606

Entity TypeIndividualMale

Primary Taxonomy207Q00000X

Provider Legal NameDR. GEOFFREY YUK FUNG TSOICredential: DO

Location Address43322 GINGHAM AVELancaster, CA 93535-4576

Mailing Address43322 Gingham AveLancaster, CA 93535-4576 · (661) 874-4050

Phone(661) 874-4050

Sole ProprietorNo

Medical School CMSOtherGraduated 2016

Enumeration DateApril 26, 2016

Last NPPES UpdateMarch 19, 20265 updates tracked since enumeration

NPPES CertifiedMarch 19, 2026

✔ NPI 1497100606 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207Q00000X

Licenses✔ Licensed in CA · 20A17304✔ Licensed in NY · 341148

Definition

Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.

43322 GINGHAM AVE, Lancaster, CA 93535

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Secondary Practice Locations 3

Location 1156 William St Rm 303New York, NY 10038-5307 · Phone (888) 803-3370

Location 2333 1st St Ste ASan Francisco, CA 94105-2661 · Phone (888) 803-3370 · Fax (888) 803-3331

Location 3415 N Crescent Dr Ste 320Beverly Hills, CA 90210-6813 · Phone (888) 803-3370 · Fax (888) 803-3331

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

Dr. Geoffrey Yuk Fung Tsoi Do 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 ID941595730

PECOS Enrollment IDI20191001002224

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.

Areas of Expertise CMS Part B claims 2

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.

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

42 services42 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

23 services18 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93535 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.

Other Providers at the Same Location NPPES 20

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

DR. MIRIAM NAZMY MD

Family Medicine