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FLORENCE K. TSO MD
NPI 1821176611
Internal Medicine in Oakland, CA

Active since November 01, 2006PECOS Enrolled
275 W MACARTHUR BLVD, OAKLAND, CA 94611(510) 752-1000 Get Directions Write a Review

NPPES record last updated: December 13, 2021. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Florence K. Tso Md NPPES

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

FLORENCE K. TSO MD (NPI 1821176611) is an individual internal medicine provider in Oakland, California, licensed in California (A60665) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1821176611
Entity TypeIndividualFemale
Primary Taxonomy207R00000X
Provider Legal NameFLORENCE K. TSOCredential: MD
Location Address275 W MACARTHUR BLVDOakland, CA 94611-5641
Mailing Address275 W Macarthur BlvdOakland, CA 94611-5641 · (510) 752-1000
Phone(510) 752-1000
Sole ProprietorNo
Enumeration DateNovember 1, 2006
Last NPPES UpdateDecember 13, 2021
✔ NPI 1821176611 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 · A60665
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.
275 W MACARTHUR BLVD, Oakland, CA 94611
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Other Identifiers 1

Medicaid00A606650CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Florence K. Tso Md 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 Reassignment

Medicare enrollment records show Florence Tso reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
10 mi
Internal Medicine
901 NEVIN
Richmond, CA 94801
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1235226531 (510) 307-1555

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94611 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
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
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. ANNA C. MORGAN MD
Specialist
275 W MACARTHUR BLVD
OAKLAND, CA 94611
Alameda County (510) 752-1000
DR. TRANG H. LA MD
Radiology (Radiation Oncology)
275 W MACARTHUR BLVD
OAKLAND, CA 94611
Alameda County (510) 752-1000
DR. AMIN MATIN M.D., M.P.H.
Radiology (Diagnostic Radiology)
275 W MACARTHUR BLVD
OAKLAND, CA 94611
Alameda County (925) 295-5758
SUCHETA KORWAR MD
Student in an Organized Health Care Education/Training Program
275 W MACARTHUR BLVD
OAKLAND, CA 94611
Alameda County (510) 752-1000
MR. MATTHEW GABRIELSON D.P.T.
Physical Therapist (Orthopedic)
275 W MACARTHUR BLVD
OAKLAND, CA 94611
Alameda County (510) 752-6221
MALORIE HACKER MD
Student in an Organized Health Care Education/Training Program
275 W MACARTHUR BLVD
OAKLAND, CA 94611
Alameda County (510) 752-1000
RENEE L. PERRY DO
Obstetrics & Gynecology
275 W MACARTHUR BLVD
OAKLAND, CA 94611
Alameda County (510) 752-1000
HERPRIT KAUR MAHAL MD
Hospitalist
275 W MACARTHUR BLVD
OAKLAND, CA 94611
Alameda County (510) 752-1000

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 Florence Tso's NPI number?

The NPI number for Florence Tso is 1821176611. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Where is Florence Tso located?

Florence Tso practices at 275 W Macarthur Blvd, Oakland, CA 94611. The listed phone number is (510) 752-1000.

What is Florence Tso's specialty?

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

Is Florence Tso enrolled in Medicare?

Yes. Florence Tso is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Florence Tso's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Florence Tso reassigns Medicare benefits to Permanente Medical Group Inc (Richmond, CA). The 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 Florence Tso's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Florence Tso was last updated on December 13, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 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.