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GREG N. MATSUBARA MD
NPI 1659459568
Internal Medicine in Fresno, CA

Active since November 01, 2006PECOS Enrolled
7300 N FRESNO ST, FRESNO, CA 93720(559) 448-4500 Get Directions Write a Review

NPPES record last updated: December 1, 2021. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Greg N. Matsubara Md NPPES

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

GREG N. MATSUBARA MD (NPI 1659459568) is an individual internal medicine provider in Fresno, California, licensed in California (G72470) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1659459568
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameGREG N. MATSUBARACredential: MD
Location Address7300 N FRESNO STFresno, CA 93720-2941
Mailing Address1800 Harrison St Fl 7Oakland, CA 94612-3466 · (510) 625-6262
Phone(559) 448-4500
Sole ProprietorNo
Enumeration DateNovember 1, 2006
Last NPPES UpdateDecember 1, 2021
✔ NPI 1659459568 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 · G72470
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.
7300 N FRESNO ST, Fresno, CA 93720
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Other Identifiers 1

Medicaid00G724700CA

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Greg N. Matsubara 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 Greg Matsubara reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Permanente Medical Group Inc
116 mi
Internal Medicine
7373 WEST LANE
Stockton, CA 95210
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1548343510 (209) 476-2000

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 93720 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
$133.94 typical visit price
range $58.87 – $176.60
Typical copayment $33.48 (range $14.71 – $44.15)
Most-billed visit code 99204
Established Patient
$103.36 typical visit price
range $19.28 – $144.60
Typical copayment $25.84 (range $4.82 – $36.15)
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.

MAULIK SHAH MD
Internal Medicine
7300 N FRESNO ST
FRESNO, CA 93720
Fresno County (559) 448-4555
DR. LYNICE FOU PHARM.D.
Pharmacist
7300 N FRESNO ST
FRESNO, CA 93720
Fresno County (559) 448-3305
DR. JUSTIN LEE MASSENGALE M.D.
Neurological Surgery
7300 N FRESNO ST
FRESNO, CA 93720
Fresno County (559) 448-4000
NILUFER RAJ GOYAL-SHOCKLEY M.D.
Pediatrics
7300 N FRESNO ST
FRESNO, CA 93720
Fresno County (559) 448-4500
HAYDEN WONG
Emergency Medicine
7300 N FRESNO ST
FRESNO, CA 93720
Fresno County (559) 554-6634
GUNEET GILL PHARMD
Pharmacist
7300 N FRESNO ST
FRESNO, CA 93720
Fresno County (559) 448-4500
KELVIN GIN SUN LEE MD
Allergy & Immunology
7300 N FRESNO ST
FRESNO, CA 93720
Fresno County (559) 448-4500
KEVIN DIPONDO OUMA MD
Internal Medicine
7300 N FRESNO ST
FRESNO, CA 93720
Fresno County (559) 448-4500

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 Greg Matsubara's NPI number?

The NPI number for Greg Matsubara is 1659459568. It was assigned to this individual provider in the NPPES registry on November 1, 2006.

Where is Greg Matsubara located?

Greg Matsubara practices at 7300 N Fresno St, Fresno, CA 93720. The listed phone number is (559) 448-4500.

What is Greg Matsubara's specialty?

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

Is Greg Matsubara enrolled in Medicare?

Yes. Greg Matsubara is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Greg Matsubara's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Greg Matsubara reassigns Medicare benefits to Permanente Medical Group Inc (Stockton, 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 Greg Matsubara'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 Greg Matsubara was last updated on December 1, 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.