RONALD W HOLZ MD/PHD
NPI 1013868207
Student in an Organized Health Care Education/Training Program in Mill Valley, CA

Q: What is Ronald Holz's NPI number?

The NPI number for Ronald Holz is 1013868207. It was assigned to this individual provider in the NPPES registry on February 4, 2026.

Q: What is Ronald Holz's specialty?

The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.

Q: When was this NPI record last updated?

The NPPES record for Ronald Holz was last updated on February 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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 04, 2026

65 LONGFELLOW RD, MILL VALLEY, CA 94941(734) 904-5227 Get Directions Write a Review

NPPES record last updated: February 4, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Ronald W Holz Md/phd NPPES

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

RONALD W HOLZ MD/PHD (NPI 1013868207) is an individual student in an organized health care education/training program in Mill Valley, California and active in the NPI registry since February 2026.

NPPES Registry Identity

NPI1013868207

Entity TypeIndividualMale

Primary Taxonomy390200000X

Provider Legal NameRONALD W HOLZCredential: MD/PHD

Location Address65 LONGFELLOW RDMill Valley, CA 94941-1592

Mailing Address65 Longfellow RdMill Valley, CA 94941-1592 · (734) 904-5227

Phone(734) 904-5227

Sole ProprietorYes

Enumeration DateFebruary 4, 2026

NPPES CertifiedFebruary 4, 2026

✔ NPI 1013868207 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyStudent in an Organized Health Care Education/Training ProgramStudent, Health Care

Taxonomy Code390200000X

Definition

An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.

65 LONGFELLOW RD, Mill Valley, CA 94941

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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

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 Ronald Holz's NPI number?

The NPI number for Ronald Holz is 1013868207. It was assigned to this individual provider in the NPPES registry on February 4, 2026.

Where is Ronald Holz located?

Ronald Holz practices at 65 Longfellow Rd, Mill Valley, CA 94941. The listed phone number is (734) 904-5227.

What is Ronald Holz's specialty?

The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.

When was this NPI record last updated?

The NPPES record for Ronald Holz was last updated on February 4, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.