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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

ROBERT J LOCK MD
NPI 1821079393
Internal Medicine - Cardiovascular Disease in Eureka, CA

Active since November 10, 2005PECOS Enrolled
2535 HARRISON AVENUE, EUREKA, CA 95501(707) 268-8718(707) 268-8008 Get Directions Write a Review

NPPES record last updated: July 13, 2026. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Robert J Lock Md NPPES

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

ROBERT J LOCK MD (NPI 1821079393) is an individual cardiovascular disease provider in Eureka, California, licensed in California (G51176) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1821079393
Entity TypeIndividualMale
Primary Taxonomy207RC0000X
Provider Legal NameROBERT J LOCKCredential: MD
Location Address2535 HARRISON AVENUEEureka, CA 95501-3220
Mailing Address2535 Harrison AveEureka, CA 95501-3220 · (707) 268-8718 · Fax (707) 268-8008
Phone(707) 268-8718
Fax(707) 268-8008
Sole ProprietorNo
Enumeration DateNovember 10, 2005
Last NPPES UpdateJuly 13, 2026
✔ NPI 1821079393 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in CA · G51176
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
2535 HARRISON AVENUE, Eureka, CA 95501
Open in Google Maps ↗

Other Identifiers 1

Medicaid00G511760CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Robert J Lock Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95501 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$133.94 typical visit price
range $58.87 – $176.60
Typical copayment $33.48 (range $14.71 – $44.15)
Most-billed visit code 99204
Established Patient
$73.16 typical visit price
range $19.28 – $144.60
Typical copayment $18.29 (range $4.82 – $36.15)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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 Robert Lock's NPI number?

The NPI number for Robert Lock is 1821079393. It was assigned to this individual provider in the NPPES registry on November 10, 2005.

Where is Robert Lock located?

Robert Lock practices at 2535 Harrison Avenue, Eureka, CA 95501. The listed phone number is (707) 268-8718.

What is Robert Lock's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Robert Lock enrolled in Medicare?

Yes. Robert Lock is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for Robert Lock was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 30 days 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.