Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 30 days.

DR. HELEN E TADJALLI M.D.
NPI 1649326430
Specialist in Saint Louis, MO

Active since January 26, 2007
969 N MASON RD, SUITE 100, SAINT LOUIS, MO 63141(314) 878-2278 Get Directions Write a Review

NPPES record last updated: July 19, 2026. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Dr. Helen E Tadjalli M.d. NPPES

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

DR. HELEN E TADJALLI M.D. (NPI 1649326430) is an individual specialist in Saint Louis, Missouri, licensed in Missouri (MD116731) and active in the NPI registry since January 2007.

NPPES Registry Identity

NPI1649326430
Entity TypeIndividualFemale
Primary Taxonomy174400000X
Provider Legal NameDR. HELEN E TADJALLICredential: M.D.
Location Address969 N MASON RD, SUITE 100Saint Louis, MO 63141-6338
Mailing Address969 N Mason Rd, Suite 100Saint Louis, MO 63141-6338 · (314) 878-2278
Sole ProprietorYes
Enumeration DateJanuary 26, 2007
Last NPPES UpdateJuly 19, 2026
NPI 1649326430 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtySpecialistOther Service Providers
Taxonomy Code174400000X
License Licensed in MO · MD116731
Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

969 N MASON RD, Saint Louis, MO 63141

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.

Internal Medicine (Sleep Medicine)
969 N MASON RD, SUITE 250
SAINT LOUIS, MO 63141
Dermatology
969 N MASON RD, DIV IM DERMATOLOGY, STE 220
SAINT LOUIS, MO 63141
Registered Nurse (Medical-Surgical)
969 N MASON RD, DEPT ORTHOPAEDIC SURGERY, STE 230
SAINT LOUIS, MO 63141
Dermatology
969 N MASON RD, DIV IM DERMATOLOGY, STE 200
SAINT LOUIS, MO 63141
Nurse Practitioner (Adult Health)
969 N MASON RD, STE 160
SAINT LOUIS, MO 63141
Internal Medicine
969 N MASON RD
SAINT LOUIS, MO 63141
Orthopaedic Surgery (Sports Medicine)
969 N MASON RD, DEPT ORTHOPAEDIC SURGERY, STE 230
SAINT LOUIS, MO 63141
Dermatology
969 N MASON RD, DIV IM DERMATOLOGY, STE 220
SAINT LOUIS, MO 63141

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 Helen Tadjalli's NPI number?

The NPI number for Helen Tadjalli is 1649326430. It was assigned to this individual provider in the NPPES registry on January 26, 2007.

Where is Helen Tadjalli located?

Helen Tadjalli practices at 969 N Mason Rd Suite 100, Saint Louis, MO 63141. The listed phone number is (314) 878-2278.

What is Helen Tadjalli's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

When was this NPI record last updated?

The NPPES record for Helen Tadjalli was last updated on July 19, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.