Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Allen Ives Arieff, MD, Inc

Q: What is the NPI number for Allen Ives Arieff, MD, Inc?

The NPI for Allen Ives Arieff, MD, Inc is 1003123555, a Type 2 (organization) record in the CMS NPPES registry.

Nephrology Physician in San Leandro, CA · enumerated 2010 · authorized official Sujata Naik, Office Manager.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1003123555

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Registry record

Entity type Organization (Type 2)

Legal business name Allen Ives Arieff, MD, Inc

Practice address 13939 E 14th St, Ste 170, San Leandro, CA, 94578

Phone (310) 433-3038

Fax (415) 332-1205

Enumeration date Sep 4, 2010

Last updated in NPPES Sep 4, 2010

Taxonomy & classification

207RN0300X Nephrology Physician Allopathic & Osteopathic Physicians · License G17509 (CA) Primary

Authorized official

Name Sujata Naik

Title Office Manager

Phone (925) 323-3301

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

Who is the authorized official for Allen Ives Arieff, MD, Inc?

NPPES lists Sujata Naik (Office Manager) as the authorized official for this organization.

What is the NPI number for Allen Ives Arieff, MD, Inc?

The NPI for Allen Ives Arieff, MD, Inc is 1003123555, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-09-04.