Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. HAROLD MARKS MD
NPI 1568422822
Surgery in Northridge, CA

Q: What is Harold Marks's NPI number?

The NPI number for Harold Marks is 1568422822. It was assigned to this individual provider in the NPPES registry on March 23, 2006.

Q: What is Harold Marks's specialty?

The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.

Q: When was this NPI record last updated?

The NPPES record for Harold Marks was last updated on July 13, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.

Active since March 23, 2006

18350 ROSCOE BLVD, SUITE 505, NORTHRIDGE, CA 91325(818) 886-3400(818) 886-3402 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: July 19, 2026.

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About Dr. Harold Marks Md NPPES

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

DR. HAROLD MARKS MD (NPI 1568422822) is an individual surgery provider in Northridge, California, licensed in California (G47893) and active in the NPI registry since March 2006.

NPPES Registry Identity

NPI1568422822

Entity TypeIndividualMale

Primary Taxonomy208600000X

Provider Legal NameDR. HAROLD MARKSCredential: MD

Location Address18350 ROSCOE BLVD, SUITE 505Northridge, CA 91325-4109

Mailing Address18350 Roscoe Blvd Suite 505Northridge, CA 91325 · (818) 886-3400 · Fax (818) 886-3402

Phone(818) 886-3400

Fax(818) 886-3402

Sole ProprietorNo

Enumeration DateMarch 23, 2006

Last NPPES UpdateJuly 13, 2026

✔ NPI 1568422822 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgeryAllopathic & Osteopathic Physicians

Taxonomy Code208600000X

License✔ Licensed in CA · G47893

Definition

A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.

18350 ROSCOE BLVD, Northridge, CA 91325

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