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

DR. JOHN C LARKIN DMD
NPI 1346221835
Dentist - General Practice in Clinton, IL

Q: What is John Larkin's NPI number?

The NPI number for John Larkin is 1346221835. It was assigned to this individual provider in the NPPES registry on November 10, 2005.

Q: What is John Larkin's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Q: When was this NPI record last updated?

The NPPES record for John Larkin 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 29 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.

Active since November 10, 2005PECOS Enrolled

323 W WASHINGTON ST, CLINTON, IL 61727(217) 935-5216 Get Directions Write a Review

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

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About Dr. John C Larkin Dmd NPPES

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

DR. JOHN C LARKIN DMD (NPI 1346221835) is an individual general practice provider in Clinton, Illinois and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1346221835

Entity TypeIndividualMale

Primary Taxonomy1223G0001X

Provider Legal NameDR. JOHN C LARKINCredential: DMD

Location Address323 W WASHINGTON STClinton, IL 61727-1640

Mailing Address323 W Washington StClinton, IL 61727-1640 · (217) 935-5216

Phone(217) 935-5216

Sole ProprietorNo

Enumeration DateNovember 10, 2005

Last NPPES UpdateJuly 13, 2026

✔ NPI 1346221835 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDentist · General PracticeDental Providers

Taxonomy Code1223G0001X

Definition

A general dentist is the primary dental care provider for patients of all ages. The general dentist is responsible for the diagnosis, treatment, management and overall coordination of services related to patients' oral health needs.

323 W WASHINGTON ST, Clinton, IL 61727

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. John C Larkin Dmd 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 61727 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

$85.71 typical visit price

range $54.80 – $168.44

Typical copayment $21.42 (range $13.70 – $42.11)

Most-billed visit code 99203

Established Patient

$68.64 typical visit price

range $17.16 – $136.56

Typical copayment $17.16 (range $4.29 – $34.14)

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 John Larkin's NPI number?

The NPI number for John Larkin is 1346221835. It was assigned to this individual provider in the NPPES registry on November 10, 2005.

Where is John Larkin located?

John Larkin practices at 323 W Washington St, Clinton, IL 61727. The listed phone number is (217) 935-5216.

What is John Larkin's specialty?

The primary specialty registered for this NPI is Dentist, specializing in General Practice, with taxonomy code 1223G0001X.

Is John Larkin enrolled in Medicare?

Yes. John Larkin is registered in the Medicare PECOS enrollment system.

When was this NPI record last updated?

The NPPES record for John Larkin 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 29 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.