GEORGE VIEWEG THIEROFF III MD
NPI 1912352931
Pediatrics - Pediatric Rheumatology in Saint Louis, MO

Q: What is George Thieroff's NPI number?

The NPI number for George Thieroff is 1912352931. It was assigned to this individual provider in the NPPES registry on April 27, 2016.

Q: What is George Thieroff's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Rheumatology, with taxonomy code 2080P0216X.

Q: When was this NPI record last updated?

The NPPES record for George Thieroff was last updated on October 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.

Active since April 27, 2016PECOS EnrolledAccepts Medicare Assignment

1465 S GRAND BLVD, SAINT LOUIS, MO 63104(314) 633-7365 Get Directions Write a Review

NPPES record last updated: October 6, 2025. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Oct 6, 2025, Jun 29, 2020 (2 updates tracked since 2020).

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About George Vieweg Thieroff Iii Md NPPES

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

GEORGE VIEWEG THIEROFF III MD (NPI 1912352931) is an individual pediatric rheumatology provider in Saint Louis, Missouri, licensed in Missouri (2025040384) and active in the NPI registry since April 2016. He is enrolled in Medicare PECOS, is affiliated with Ssm Health St Mary's Hospital - St Louis, and is a graduate of Other (2016).

NPPES Registry Identity

NPI1912352931

Entity TypeIndividualMale

Primary Taxonomy2080P0216X

Provider Legal NameGEORGE VIEWEG THIEROFF IIICredential: MD

Location Address1465 S GRAND BLVDSaint Louis, MO 63104-1003

Mailing Address1101 E Marshall St # 980663Richmond, VA 23298-5008 · (804) 828-9357 · Fax (804) 828-8660

Phone(314) 633-7365

Sole ProprietorNo

Medical School CMSOtherGraduated 2016

Enumeration DateApril 27, 2016

Last NPPES UpdateOctober 6, 20252 updates tracked since enumeration

NPPES CertifiedOctober 6, 2025

✔ NPI 1912352931 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyPediatrics · Pediatric RheumatologyAllopathic & Osteopathic Physicians

Taxonomy Code2080P0216X

License✔ Licensed in MO · 2025040384

Definition

A pediatrician who treats diseases of joints, muscle, bones and tendons. A pediatric rheumatologist diagnoses and treats arthritis, back pain, muscle strains, common athletic injuries and collagen diseases.

Also ListedInternal MedicineTaxonomy 207R00000X · License 2025040384 (MO)

Also ListedInternal Medicine · RheumatologyTaxonomy 207RR0500X · License 2025040384 (MO)

1465 S GRAND BLVD, Saint Louis, MO 63104

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Accepted Insurance

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

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

George Vieweg Thieroff Iii Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID2466746979

PECOS Enrollment IDI20251006001018

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.

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Ssm Health St Mary's Hospital - St Louis

Acute Care Hospitals · Richmond Heights, MO

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number260091

Location6420 Clayton RdRichmond Heights, MO 63117 · St. Louis County

Emergency services Birthing friendly

Ssm Health Saint Louis University Hospital

Acute Care Hospitals · Saint Louis, MO

1/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number260105

Location3635 Vista AveSaint Louis, MO 63110 · St. Louis City County

Emergency services

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.

DR. SARAH MARGARET HANLY PH.D.

Psychologist (Clinical)

1465 S GRAND BLVD
SAINT LOUIS, MO 63104

St. Louis City (314) 577-5667

KAVIPRIYA KOMESWARAN

Pediatrics (Pediatric Critical Care Medicine)

1465 S GRAND BLVD
SAINT LOUIS, MO 63104

St. Louis City (314) 617-2000

ALEXIS HAAS STEWART

Anesthesiologist Assistant

1465 S GRAND BLVD
SAINT LOUIS, MO 63104

St. Louis City (314) 977-5700

NATALIE DRURY RD, LD

Dietitian, Registered (Nutrition, Pediatric)

1465 S GRAND BLVD
SAINT LOUIS, MO 63104

St. Louis City (314) 577-5387

TIMOTHY J KUTZ MD

Pediatrics (Child Abuse Pediatrics)

1465 S GRAND BLVD
SAINT LOUIS, MO 63104

St. Louis City (314) 268-6406

CHRISTOPHER SALLEE MD

Pediatrics

1465 S GRAND BLVD
ST. LOUIS, MO 63104

St. Louis City (314) 577-1607

AMBER GRANA DO

Pediatrics (Pediatric Critical Care Medicine)

1465 S GRAND BLVD, DIVISION OF PEDIATRIC CRITICAL CARE
SAINT LOUIS, MO 63104

St. Louis City (314) 577-5695

DR. ETHAN EMIL PFEIFER MD

Student in an Organized Health Care Education/Training Program

1465 S GRAND BLVD
SAINT LOUIS, MO 63104

St. Louis City (314) 268-4070

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 George Thieroff's NPI number?

The NPI number for George Thieroff is 1912352931. It was assigned to this individual provider in the NPPES registry on April 27, 2016.

Where is George Thieroff located?

George Thieroff practices at 1465 S Grand Blvd, Saint Louis, MO 63104. The listed phone number is (314) 633-7365.

What is George Thieroff's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Rheumatology, with taxonomy code 2080P0216X.

Is George Thieroff enrolled in Medicare?

Yes. George Thieroff is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does George Thieroff accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 3 other insurers list George Thieroff 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.

Is George Thieroff affiliated with any hospitals?

According to CMS data, George Thieroff is affiliated with Ssm Health St Mary's Hospital - St Louis and Ssm Health Saint Louis University Hospital.

When was this NPI record last updated?

The NPPES record for George Thieroff was last updated on October 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 10 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.