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DR. BRIAN AARON WEISENBERG M.D.
NPI 1093831042
Emergency Medicine in Saint Charles, MO

Active since March 21, 2007PECOS Enrolled
300 1ST CAPITOL DR, SAINT CHARLES, MO 63301(636) 947-5111 Get Directions Write a Review

NPPES record last updated: June 25, 2019. Verified against the NPPES registry weekly; last sync: October 25, 2026.

About Dr. Brian Aaron Weisenberg M.d. NPPES

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

DR. BRIAN AARON WEISENBERG M.D. (NPI 1093831042) is an individual emergency medicine provider in Saint Charles, Missouri, licensed in Missouri (2008002490) and active in the NPI registry since March 2007. He is enrolled in Medicare PECOS and maintains a secondary practice location in Saint Louis.

NPPES Registry Identity

NPI1093831042
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. BRIAN AARON WEISENBERGCredential: M.D.
Location Address300 1ST CAPITOL DRSaint Charles, MO 63301
Mailing Address300 1st Capitol DrSaint Charles, MO 63301-2844 · (636) 947-5111
Phone(636) 947-5111
Sole ProprietorNo
Enumeration DateMarch 21, 2007
Last NPPES UpdateJune 25, 2019
✔ NPI 1093831042 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in MO · 2008002490
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
300 1ST CAPITOL DR, Saint Charles, MO 63301
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Secondary Practice Location 1

Location 110010 Kennerly RdSaint Louis, MO 63128-2106 · Phone (314) 525-1906

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Arkansas Blue Cross and Blue Shield, Health Advantage, Octave.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. Brian Aaron Weisenberg M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

4

Medicare enrollment records show Brian Weisenberg reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Cep America LLC
Same address
Emergency Medicine
300 1ST CAPITOL DR
Saint Charles, MO 63301
  • Reassigned Medicare billing, Missouri enrollment
  • 269 clinicians in this Medicare group
NPI 1477108892 (636) 947-5000
Mercy Aco Clinical Services Inc
9.6 mi
Neurology
15740 S OUTER 40 RD
Chesterfield, MO 63017
  • Reassigned Medicare billing, Missouri enrollment
  • 263 clinicians in this Medicare group
NPI 1063965093 (636) 237-4200
Mercy Hospital South
20 mi
General Acute Care Hospital
10010 KENNERLY RD
Saint Louis, MO 63128
  • Reassigned Medicare billing, Missouri enrollment
  • 186 clinicians in this Medicare group
NPI 1568481984 (314) 525-1000
Mercy Health Northwest Arkansas Communities
260 mi
Multi-Specialty
1 MERCY WAY
Bella Vista, AR 72714
  • Reassigned Medicare billing, Arkansas enrollment
  • 472 clinicians in this Medicare group
NPI 1396173514 (479) 802-5555

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

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
305 services281 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
109 services105 patients
Electrocardiogram (ecg) 1 to 3 leads with review by physician only 93042
An Electrocardiogram (ECG) is a non-invasive test that records the electrical activity of your heart. 1 to 3 leads or sensors are placed on your body to capture this data. A physician then reviews the results to evaluate your heart's health.
79 services74 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
39 services39 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63301 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
$86.32 typical visit price
range $55.65 – $169.38
Typical copayment $21.58 (range $13.91 – $42.34)
Most-billed visit code 99203
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 20

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

KATHLEEN F. CHRISTLIEB PA
Physician Assistant
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (636) 947-5000
JULIE L ROACH CRNA
Nurse Anesthetist, Certified Registered
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (314) 989-3000
DR. ROMEL IZQUIERDO-MALON M.D.
Internal Medicine
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (314) 317-0600
RACHAEL KING RD
Dietitian, Registered
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (636) 947-5156
ANGELA GLASS MSOTR/L
Occupational Therapist
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (636) 947-5000
FRANK S CALANDRINO JR MD LLC
Internal Medicine (Pulmonary Disease)
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (314) 330-8616
DR. DAVID N MAYWRIGHT PHARMD
Pharmacist
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (314) 541-9482
ANTHONY W JENNINGS M.D.
Emergency Medicine
300 1ST CAPITOL DR
SAINT CHARLES, MO 63301
St. Charles County (636) 947-5000

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 Brian Weisenberg's NPI number?

The NPI number for Brian Weisenberg is 1093831042. It was assigned to this individual provider in the NPPES registry on March 21, 2007.

Where is Brian Weisenberg located?

Brian Weisenberg practices at 300 1st Capitol Dr, Saint Charles, MO 63301. The listed phone number is (636) 947-5111.

What is Brian Weisenberg's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Brian Weisenberg enrolled in Medicare?

Yes. Brian Weisenberg is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Brian Weisenberg's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Brian Weisenberg reassigns Medicare benefits to 4 organizations: Cep America LLC (Saint Charles, MO), Mercy Aco Clinical Services Inc (Chesterfield, MO), Mercy Hospital South (Saint Louis, MO) and Mercy Health Northwest Arkansas Communities (Bella Vista, AR). 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 Brian Weisenberg's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Brian Weisenberg accept?

Health plans from Arkansas Blue Cross and Blue Shield, Health Advantage and Octave list Brian Weisenberg 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 Brian Weisenberg was last updated on June 25, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.