ST. CHARLES NEPHROLOGY
NPI 1396945168
Internal Medicine - Nephrology in Saint Peters, MO

Q: What is St. Charles Nephrology's NPI number?

The NPI number for St. Charles Nephrology is 1396945168. It was assigned to this organization in the NPPES registry on July 20, 2007.

Q: What is St. Charles Nephrology's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Active since July 20, 2007

6 JUNGERMANN CIR, SUITE 215, SAINT PETERS, MO 63376(636) 928-0123(636) 928-0129 Get Directions Write a Review

NPPES record last updated: September 21, 2020. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Sep 21, 2020, Mar 13, 2020 (2 updates tracked since 2020).

On this page

About St. Charles Nephrology NPPES

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

ST. CHARLES NEPHROLOGY (NPI 1396945168) is a healthcare organization registered as a nephrology in Saint Peters, Missouri and active in the NPI registry since July 2007. The organization lists Henrikas I Juknis, President, as its authorized official.

NPPES Registry Identity

NPI1396945168

Entity TypeOrganization

Primary Taxonomy207RN0300X

Legal Business NameST. CHARLES NEPHROLOGY

Location Address6 JUNGERMANN CIR, SUITE 215Saint Peters, MO 63376-1621

Mailing Address6 Jungermann Cir, Suite 215Saint Peters, MO 63376-1621 · (636) 928-0123 · Fax (636) 928-0129

Phone(636) 928-0123

Fax(636) 928-0129

Organization SubpartNo

Authorized OfficialHenrikas I JuknisPresident · (636) 928-0123

Enumeration DateJuly 20, 2007

Last NPPES UpdateSeptember 21, 20202 updates tracked since enumeration

NPPES CertifiedSeptember 21, 2020

✔ NPI 1396945168 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · NephrologyAllopathic & Osteopathic Physicians

Taxonomy Code207RN0300X

License✔ Licensed in MO · 2000158727

Definition

An internist who treats disorders of the kidney, high blood pressure, fluid and mineral balance and dialysis of body wastes when the kidneys do not function. This specialist consults with surgeons about kidney transplantation.

6 JUNGERMANN CIR, Saint Peters, MO 63376

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Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan, Ambetter Health and more.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

St. Charles Nephrology is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

Medicare enrollment records show 1 clinician reassigns Medicare billing to St. Charles Nephrology, which bills Medicare for the services this clinician delivers.

Clinician (1)

Henrikas Juknis, MD

Nephrology

NPI 1578531299

6 JUNGERMANN CIR STE 215
Saint Peters, MO 63376

(636) 928-0123

✔ PECOS✔ Accepts Medicare2.5 mi

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 St. Charles Nephrology's NPI number?

The NPI number for St. Charles Nephrology is 1396945168. It was assigned to this organization in the NPPES registry on July 20, 2007.

Where is St. Charles Nephrology located?

St. Charles Nephrology is located at 6 Jungermann Cir Suite 215, Saint Peters, MO 63376. The listed phone number is (636) 928-0123.

What is St. Charles Nephrology's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Nephrology, with taxonomy code 207RN0300X.

Is St. Charles Nephrology enrolled in Medicare?

Yes. St. Charles Nephrology is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through St. Charles Nephrology?

According to the CMS Revalidation Reassignment List (October 2026 release), 1 clinician (Nephrology) reassigns their Medicare billing to St. Charles Nephrology. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does St. Charles Nephrology accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 2 other insurers list St. Charles Nephrology as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for St. Charles Nephrology was last updated on September 21, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.