Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

JONATHAN HENRY SEGAL MD
NPI 1780666164
Internal Medicine - Nephrology in Martinez, CA

Q: What is Jonathan Segal's NPI number?

The NPI number for Jonathan Segal is 1780666164. It was assigned to this individual provider in the NPPES registry on November 18, 2005.

Q: What is Jonathan Segal's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Q: When was this NPI record last updated?

The NPPES record for Jonathan Segal was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 27 days 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 November 18, 2005PECOS Enrolled

150 MUIR RD, MARTINEZ, CA 94553(925) 372-4610(925) 372-2804 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Jonathan Henry Segal Md NPPES

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

JONATHAN HENRY SEGAL MD (NPI 1780666164) is an individual nephrology provider in Martinez, California, licensed in California (G59448) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1780666164

Entity TypeIndividualMale

Primary Taxonomy207RN0300X

Provider Legal NameJONATHAN HENRY SEGALCredential: MD

Location Address150 MUIR RDMartinez, CA 94553-4668

Mailing Address150 Muir RdMartinez, CA 94553-4668 · (925) 372-4610 · Fax (925) 372-2804

Phone(925) 372-4610

Fax(925) 372-2804

Sole ProprietorNo

Enumeration DateNovember 18, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1780666164 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians

Taxonomy Code207RN0300X

License✔ Licensed in CA · G59448

Definition

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

150 MUIR RD, Martinez, CA 94553

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Jonathan Henry Segal 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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94553 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.

SAHIBA SINGH CHOWDHARY PSYD

Psychologist (Clinical)

150 MUIR RD
MARTINEZ, CA 94553

Contra Costa County (925) 372-2557

NESLIHAN JAMES-KANGAL PHD

Psychologist

150 MUIR RD
MARTINEZ, CA 94553

Contra Costa County (925) 370-4783

DR. BERNADETTE M DUGONI PHARM D

Pharmacist

150 MUIR RD
MARTINEZ, CA 94553

Contra Costa County (925) 372-2390

PAMELA ADHLAKHA

Occupational Therapist

150 MUIR RD
MARTINEZ, CA 94553

Contra Costa County (925) 370-4751

DR. ASHIQ MATHEW GEORGE M.D.

Psychiatry & Neurology (Psychiatry)

150 MUIR RD, MENTAL HEALTH CLINIC (116)
MARTINEZ, CA 94553

Contra Costa County (925) 372-2000

UMELO UGWOABA PHD, MPH

Psychologist

150 MUIR RD
MARTINEZ, CA 94553

Contra Costa County (925) 372-2558

BRENT RICHARD FERM PHD

Psychologist

150 MUIR RD, MENTAL HEALTH
MARTINEZ, CA 94553

Contra Costa County (925) 372-2105

DR. MATTHEW S. FALK MD

Nuclear Medicine

150 MUIR RD, VA NORTHERN CALIFORNIA HEALTH CARE SYSTEM
MARTINEZ, CA 94553

Contra Costa County (925) 372-2124

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 Jonathan Segal's NPI number?

The NPI number for Jonathan Segal is 1780666164. It was assigned to this individual provider in the NPPES registry on November 18, 2005.

Where is Jonathan Segal located?

Jonathan Segal practices at 150 Muir Rd, Martinez, CA 94553. The listed phone number is (925) 372-4610.

What is Jonathan Segal's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is Jonathan Segal enrolled in Medicare?

Yes. Jonathan Segal is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Jonathan Segal was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 27 days 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.