Arthur N Donaldson M D INC in Sonora, CA

This location of Arthur N Donaldson M D bills under NPI 1558497263, an organization record issued on Feb 26, 2007 with the primary taxonomy Ambulatory Surgical Clinic/Center. It is one of 5 NPIs registered under this name and one of 3 in Sonora; each clinician who sees you there has their own NPI and license.

CMS NPPES registry, file of Aug 9, 2026 · method · Verify with CMS →

Organization recordNPPES, Aug 2026

1558497263

Legal name: Arthur N Donaldson M D INC
Entity: Type 2 · organization, a subpart
Parent organization: Arthur N Donaldson M D INC
Primary taxonomy: Ambulatory Surgical Clinic/Center 261QA1903X
Practice location: 940 SYLVA LN SUITE G, Sonora, CA 95370
Phone: 209-532-0340
Enumerated: Feb 26, 2007
Record updated: Mar 5, 2014
Authorized official: President (title as filed)

Public record from the NPPES NPI Registry (open it on CMS). An NPI identifies who bills; it is not a facility license.

The other 2 Sonora NPIs

Arthur N. Donaldson, M.d., INC940 SYLVA LN SUITE G · issued Nov 16, 20061538232525
Arthur N Donaldson M D INC940 SYLVA LN STE.G · issued Feb 28, 20071497882914

2 clinicians CMS lists with Arthur N Donaldson M D in Sonora

Gerard Ardron, MDOphthalmology Physician1689709982
Perry Haugen, MDOphthalmology Physician1043345366

Source: CMS Doctors and Clinicians group affiliations, matched by practice name and city.

All 5 Arthur N Donaldson M D NPIs

Every location registered under this name, in 2 cities.

See every location

Checking an organization

Confirm the business with the California secretary of state.
Check the HHS-OIG exclusion list for the organization.
Verify each clinician on their own record and the state license search.

Common questions

What does subpart mean?

The organization registered this NPI as a subpart: a part of the organization, such as a location, that bills under its own NPI.

Is an organization NPI a license?

No. An NPI identifies who bills. Facilities and the clinicians who work there are licensed separately by the state.

Which Sonora NPI should I use?

Ask the office which NPI it bills under; all 3 Sonora NPIs are registered under the same name.

Source: CMS National Plan and Provider Enumeration System (NPPES), monthly file of Aug 9, 2026 (NPPES files on CMS.gov). An NPI identifies who bills; it is not a license.