Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Don R Wolff MD Inc

Q: What type of organization is Don R Wolff MD Inc?

Don R Wolff MD Inc is registered in NPPES as a Ophthalmology Physician (its primary provider taxonomy).

Ophthalmology Physician in Walnut Creek, CA · enumerated 2007 · authorized official Don Wolff, President.

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

National Provider Identifier

1669689691

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Registry record

Entity type Organization (Type 2)

Legal business name Don R Wolff MD Inc

Practice address 2021 Ygnacio Valley Rd Ste C102, Walnut Creek, CA, 94598

Phone (925) 256-8464

Fax (925) 256-8320

Enumeration date May 17, 2007

Last updated in NPPES Mar 14, 2012

Taxonomy & classification

207W00000X Ophthalmology Physician Allopathic & Osteopathic Physicians · License A789840 (CA) Primary

Authorized official

Name Don Wolff

Title President

Phone (925) 256-8464

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

What type of organization is Don R Wolff MD Inc?

Don R Wolff MD Inc is registered in NPPES as a Ophthalmology Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-03-14.