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RONALD JOHNSON MD
NPI 1336213644
Ophthalmology in Walnut Creek, CA

Active since November 20, 2006
320 LENNON LN, WALNUT CREEK, CA 94598(925) 906-2000 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: August 16, 2026.

About Ronald Johnson Md NPPES

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

RONALD JOHNSON MD (NPI 1336213644) is an individual ophthalmology provider in Walnut Creek, California, licensed in California (G44679) and active in the NPI registry since November 2006.

NPPES Registry Identity

NPI1336213644
Entity TypeIndividualMale
Primary Taxonomy207W00000X
Provider Legal NameRONALD JOHNSONCredential: MD
Location Address320 LENNON LNWalnut Creek, CA 94598-2419
Mailing Address1800 Harrison St Fl 7Oakland, CA 94612-3429 · (510) 625-6262
Phone(925) 906-2000
Sole ProprietorNo
Enumeration DateNovember 20, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1336213644 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOphthalmologyAllopathic & Osteopathic Physicians
Taxonomy Code207W00000X
License✔ Licensed in CA · G44679
Definition
An ophthalmologist has the knowledge and professional skills needed to provide comprehensive eye and vision care. Ophthalmologists are medically trained to diagnose, monitor and medically or surgically treat all ocular and visual disorders. This includes problems affecting the eye and its component structures, the eyelids, the orbit and the visual pathways. In so doing, an ophthalmologist prescribes vision services, including glasses and contact lenses.
320 LENNON LN, Walnut Creek, CA 94598
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Other Identifiers 3

Medicare ID-Type Unspecified00G446790
Medicaid00G446790CA
Medicare UPINA89805

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

LINDA MARIE HECKENLIVELY M.S., CCC-SLP
Speech-Language Pathologist
320 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 906-2268
DR. NEGAR DOLATSHAHI PIROOZ OD
Optometrist
320 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 906-2156
KARIN HESS BRIGHT PT
Physical Therapist (Hand)
320 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 906-2055
STEPHANIE M. PO MD
Ophthalmology
320 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 906-2000
MR. DAVID NATHANSON
Internal Medicine
320 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 906-2000
DR. KENNETH MUN LEE O.D.
Optometrist
320 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 906-2171
JUDY KWAK
Pharmacist
320 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (925) 906-2503
DR. TIMMOTHY O MERRIGAN M.D.
Family Medicine
320 LENNON LN
WALNUT CREEK, CA 94598
Contra Costa County (924) 906-2326

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 Johnson's NPI number?

The NPI number for Ronald Johnson is 1336213644. It was assigned to this individual provider in the NPPES registry on November 20, 2006.

Where is Ronald Johnson located?

Ronald Johnson practices at 320 Lennon Ln, Walnut Creek, CA 94598. The listed phone number is (925) 906-2000.

What is Ronald Johnson's specialty?

The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.

When was this NPI record last updated?

The NPPES record for Ronald Johnson was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 years 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.