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DR. MOLLY BARR MD
NPI 1821659145
Pediatrics - Pediatric Gastroenterology in Saint Louis, MO

Active since June 26, 2019PECOS Enrolled
1 CHILDRENS PL CB 8116, SAINT LOUIS, MO 63110(314) 454-6173(314) 454-2412 Get Directions Write a Review

NPPES record last updated: April 1, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Apr 1, 2025, Feb 5, 2025, Apr 6, 2022 (3 updates tracked since 2022).

About Dr. Molly Barr Md NPPES

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

DR. MOLLY BARR MD (NPI 1821659145) is an individual pediatric gastroenterology provider in Saint Louis, Missouri, licensed in Missouri (2021036581) and active in the NPI registry since June 2019. She is enrolled in Medicare PECOS, maintains a secondary practice location in Saint Louis, and is a graduate of Indiana University School Of Medicine (2019).

NPPES Registry Identity

NPI1821659145
Entity TypeIndividualFemale
Primary Taxonomy2080P0206X
Provider Legal NameDR. MOLLY BARRCredential: MD
Location Address1 CHILDRENS PL CB 8116Saint Louis, MO 63110
Mailing Address1 Childrens Pl Cb 8116Saint Louis, MO 63110 · (314) 454-6173 · Fax (314) 454-2412
Phone(314) 454-6173
Fax(314) 454-2412
Sole ProprietorNo
Medical School CMSIndiana University School Of MedicineGraduated 2019
Enumeration DateJune 26, 2019
Last NPPES UpdateApril 1, 20253 updates tracked since enumeration
NPPES CertifiedApril 1, 2025
✔ NPI 1821659145 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPediatrics · Pediatric GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code2080P0206X
License✔ Licensed in MO · 2021036581
Definition
A pediatrician who specializes in the diagnosis and treatment of diseases of the digestive systems of infants, children and adolescents. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using lighted scopes to see internal organs.
Also ListedPediatricsTaxonomy 208000000X · License 2021036581 (MO)
1 CHILDRENS PL CB 8116, Saint Louis, MO 63110
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Other Names 1

Former Name (1)Molly Knecht

Secondary Practice Location 1

Location 11465 S Grand BlvdSaint Louis, MO 63104-1003 · Phone (314) 617-2000

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, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. Molly Barr Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID6800326505
PECOS Enrollment IDI20251003003883
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.

Medicare Billing Reassignments

2

Medicare enrollment records show Molly Barr reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ssm Health Care Group
1.7 mi
Internal Medicine
1225 SOUTH GRAND BLVD, 2L - DOOR 3,4
Saint Louis, MO 63104
  • Reassigned Medicare billing, Missouri enrollment
  • 1,294 clinicians in this Medicare group
NPI 1306589544 (314) 977-6100
Ssm Cardinal Glennon Childrens Hospital
11 mi
Pediatrics
2927 S . KINGS HIGHWAY BLVD
Saint Louis, MO 63139
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: Ssm Cardinal Glennon Children's Hospital
  • 76 clinicians in this Medicare group
NPI 1073568226 (314) 268-4070

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63110 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
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 13

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. AHMAD TARIQ HAMED M.D.
Pediatrics (Pediatric Critical Care Medicine)
1 CHILDRENS PL CB 8116
SAINT LOUIS, MO 63110
St. Louis City (144) 542-5273
DR. SHILPA RAMPEY VENKATA NAGA MBBS
Pediatrics
1 CHILDRENS PL CB 8116
SAINT LOUIS, MO 63110
St. Louis City (314) 454-6018
AMEENA NOOR HUSAIN D.O.
Pediatrics (Neonatal-Perinatal Medicine)
1 CHILDRENS PL CB 8116
ST. LOUIS, MO 63110
St. Louis City (314) 454-6148
PRAPTI SINGH DO
Pediatrics
1 CHILDRENS PL CB 8116
SAINT LOUIS, MO 63110
St. Louis City (314) 454-6093
DR. DEVON PATRICK SWOFFORD DO
Pediatrics (Neonatal-Perinatal Medicine)
1 CHILDRENS PL CB 8116
SAINT LOUIS, MO 63110
St. Louis City (314) 454-6148
DR. CORY PATRICK MILLER MD
Pediatrics (Pediatric Critical Care Medicine)
1 CHILDRENS PL CB 8116
SAINT LOUIS, MO 63110
St. Louis City (314) 454-2527
NADIA WATTAD
Pediatrics
1 CHILDRENS PL CB 8116
SAINT LOUIS, MO 63110
St. Louis City (314) 454-2694
AARON EDWARD DELGADO MD
Pediatrics
1 CHILDRENS PL CB 8116
SAINT LOUIS, MO 63110
St. Louis City (314) 454-6148

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 Molly Barr's NPI number?

The NPI number for Molly Barr is 1821659145. It was assigned to this individual provider in the NPPES registry on June 26, 2019. The provider is also known as Molly Knecht.

Where is Molly Barr located?

Molly Barr practices at 1 Childrens Pl Cb 8116, Saint Louis, MO 63110. The listed phone number is (314) 454-6173.

What is Molly Barr's specialty?

The primary specialty registered for this NPI is Pediatrics, specializing in Pediatric Gastroenterology, with taxonomy code 2080P0206X.

Is Molly Barr enrolled in Medicare?

Yes. Molly Barr is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Molly Barr's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Molly Barr reassigns Medicare benefits to 2 organizations: Ssm Health Care Group (Saint Louis, MO) and Ssm Cardinal Glennon Childrens Hospital (Saint Louis, MO). Each 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 Molly Barr's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Molly Barr 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 4 other insurers list Molly Barr 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 Molly Barr was last updated on April 1, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.