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KARL CHRISTIAN SONNTAG MD
NPI 1164029146
Internal Medicine in Saint Louis, MO

Active since October 03, 2020
6420 CLAYTON RD, SAINT LOUIS, MO 63117(314) 768-8373 Get Directions Write a Review

NPPES record last updated: June 2, 2026. Verified against the NPPES registry weekly; last sync: August 02, 2026.

Record update history: Jun 2, 2026, Oct 3, 2020 (2 updates tracked since 2020).

About Karl Christian Sonntag Md NPPES

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

KARL CHRISTIAN SONNTAG MD (NPI 1164029146) is an individual internal medicine provider in Saint Louis, Missouri, licensed in Missouri (2023047698) and active in the NPI registry since October 2020.

NPPES Registry Identity

NPI1164029146
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameKARL CHRISTIAN SONNTAGCredential: MD
Location Address6420 CLAYTON RDSaint Louis, MO 63117-1811
Mailing Address6420 Clayton RdSaint Louis, MO 63117-1811 · (314) 768-8373
Phone(314) 768-8373
Sole ProprietorNo
Enumeration DateOctober 3, 2020
Last NPPES UpdateJune 2, 20262 updates tracked since enumeration
NPPES CertifiedJune 2, 2026
✔ NPI 1164029146 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MO · 2023047698
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
6420 CLAYTON RD, Saint Louis, MO 63117
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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.

KRISTA HARRY PHARMD
Pharmacist
6420 CLAYTON RD
RICHMOND HEIGHTS, MO 63117
St. Louis County (314) 768-8341
ANDERSON WEST JR. REGISTERED NURSE
Registered Nurse
6420 CLAYTON RD
RICHMOND HEIGHTS, MO 63117
St. Louis County (314) 768-8644
VICTORIA CERNETICH MS, RD, LD
Dietitian, Registered
6420 CLAYTON RD
RICHMOND HEIGHTS, MO 63117
St. Louis County (314) 768-8891
DR. SHOUYING DU M.D
Pathology (Anatomic Pathology & Clinical Pathology)
6420 CLAYTON RD
SAINT LOUIS, MO 63117
St. Louis County (314) 344-7525
AUDREY KATE DOMBROWSKI MS, RD, LD
Dietitian, Registered
6420 CLAYTON RD
RICHMOND HEIGHTS, MO 63117
St. Louis County (314) 768-8891
MARISA CLEMENTE
Occupational Therapist
6420 CLAYTON RD
RICHMOND HEIGHTS, MO 63117
St. Louis County (314) 768-8000
LAUREN VALERIA EVELTI
Student in an Organized Health Care Education/Training Program
6420 CLAYTON RD
SAINT LOUIS, MO 63117
St. Louis County (314) 768-8000
PAMELA HAMPTON CRNA
Nurse Anesthetist, Certified Registered
6420 CLAYTON RD
SAINT LOUIS, MO 63117
St. Louis County (314) 768-8442

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 Karl Sonntag's NPI number?

The NPI number for Karl Sonntag is 1164029146. It was assigned to this individual provider in the NPPES registry on October 3, 2020.

Where is Karl Sonntag located?

Karl Sonntag practices at 6420 Clayton Rd, Saint Louis, MO 63117. The listed phone number is (314) 768-8373.

What is Karl Sonntag's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

When was this NPI record last updated?

The NPPES record for Karl Sonntag was last updated on June 2, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.