DR. ALEXANDRA BAUMANN D.O.
NPI 1124380332
Internal Medicine - Gastroenterology in Chicago, IL

Q: What is Alexandra Baumann's NPI number?

The NPI number for Alexandra Baumann is 1124380332. It was assigned to this individual provider in the NPPES registry on June 13, 2012.

Q: What is Alexandra Baumann's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Q: When was this NPI record last updated?

The NPPES record for Alexandra Baumann was last updated on December 6, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.

Active since June 13, 2012PECOS EnrolledAccepts Medicare Assignment

94.1/100

CMS Quality Rating

259 E ERIE ST FL 16, CHICAGO, IL 60611(312) 695-5620(312) 926-1925 Get Directions Write a Review

NPPES record last updated: December 6, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Dec 6, 2023, Apr 26, 2019 (2 updates tracked since 2019).

On this page

About Dr. Alexandra Baumann D.o. NPPES

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

DR. ALEXANDRA BAUMANN D.O. (NPI 1124380332) is an individual gastroenterology provider in Chicago, Illinois, licensed in Illinois (036149216) and active in the NPI registry since June 2012. She is enrolled in Medicare PECOS, is affiliated with Northwestern Lake Forest Hospital, and is a graduate of Midwestern University, Chicago College Of Osteopathic Med (2012).

NPPES Registry Identity

NPI1124380332

Entity TypeIndividualFemale

Primary Taxonomy207RG0100X

Provider Legal NameDR. ALEXANDRA BAUMANNCredential: D.O.

Location Address259 E ERIE ST FL 16Chicago, IL 60611-2987

Mailing Address259 E Erie St Fl 16Chicago, IL 60611-2987 · (312) 695-5620

Phone(312) 695-5620

Fax(312) 926-1925

Sole ProprietorNo

Medical School CMSMidwestern University, Chicago College Of Osteopathic MedGraduated 2012

Enumeration DateJune 13, 2012

Last NPPES UpdateDecember 6, 20232 updates tracked since enumeration

NPPES CertifiedDecember 6, 2023

✔ NPI 1124380332 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in IL · 036149216

Definition

An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.

Also ListedInternal MedicineTaxonomy 207R00000X · License OS017468 (PA)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X · License OT014796 (PA), UO5052 (FL)

259 E ERIE ST FL 16, Chicago, IL 60611

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Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Alexandra Baumann D.o. 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 ID5991019390

PECOS Enrollment IDI20190529001198

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 Reassignment

Medicare enrollment records show Alexandra Baumann reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Northwestern Medical Faculty Foundation

34 mi

Multi-Specialty

DEPT 5777
Carol Stream, IL 60122

Reassigned Medicare billing, Illinois enrollment
4,817 clinicians in this Medicare group

NPI 1346235314 (855) 694-2866

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 12

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.

Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope 43239

This procedure involves using a thin, flexible tube with a light and camera, known as an endoscope, to examine the esophagus, stomach, and upper part of the small intestine. Small tissue samples are taken for further examination to help diagnose various conditions.

50 services47 patients

Biopsy of large bowel using a flexible endoscope 45380

A biopsy of the large bowel using a flexible endoscope is a procedure where a thin, flexible tube with a camera is inserted through the rectum to examine the bowel. If abnormal tissue is found, a small sample is taken for further examination. This helps in diagnosing conditions like inflammation, polyps, or cancer.

41 services41 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

40 services37 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

40 services39 patients

Removal of polyps or growths of large bowel using an endoscope with mechanical snare 45385

This procedure involves using a thin, flexible tube called an endoscope to examine the large bowel. If any abnormal growths or polyps are found, a tool called a mechanical snare is used to remove them. This is a common method to prevent potential health issues.

39 services39 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.

37 services33 patients

Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215

37 services34 patients

Balloon dilation of esophagus, stomach, and/or upper small bowel using a flexible endoscope, less than 3.0 cm 43249

This procedure involves using a flexible tube with a camera, called an endoscope, to gently expand narrowed areas in your esophagus, stomach, or upper small bowel. A small balloon is inflated, making it easier for food and liquid to pass through. It's safe and effective.

22 services17 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

22 services20 patients

Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito G0500

Moderate sedation is a method where a physician uses medication to help you relax during a gastrointestinal endoscopy. An independent trained observer will be present to monitor your vital signs and ensure your safety throughout the procedure. It's a common and safe practice.

22 services22 patients

New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205

This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.

18 services18 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

15 services15 patients

Hospital Affiliations CMS Care Compare 2

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

Northwestern Lake Forest Hospital

Acute Care Hospitals · Lake Forest, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number140130

Location1000 N Westmoreland RoadLake Forest, IL 60045 · Lake County

Emergency services Birthing friendly

Northwestern Memorial Hospital

Acute Care Hospitals · Chicago, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140281

Location251 E Huron StChicago, IL 60611 · Cook County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60611 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

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

Established Patient

$105.70 typical visit price

range $18.97 – $148.12

Typical copayment $26.42 (range $4.74 – $37.03)

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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

94.1/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

82.59

Promoting Interoperability

100

Improvement Activities

Other Providers at the Same Location NPPES 12

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

JASMINE JOHNSON MS, RD, LD

Dietitian, Registered

259 E ERIE ST FL 16
CHICAGO, IL 60611

Cook County (312) 695-7070

ANNE M STEY MD

Surgery (Trauma Surgery)

259 E ERIE ST FL 16
CHICAGO, IL 60611

Cook County (312) 695-8918

AMY ROSE ARBUS RD

Dietitian, Registered

259 E ERIE ST FL 16
CHICAGO, IL 60611

Cook County (312) 695-7070

DR. SARA HOFFMAN PHD

Psychologist (Clinical)

259 E ERIE ST FL 16
CHICAGO, IL 60611

Cook County (312) 629-2620

HAZEL DHATES ASUNIO DOMINGO PA-C

Physician Assistant

259 E ERIE ST FL 16
CHICAGO, IL 60611

Cook County (312) 695-5620

MRS. JENNIFER A CARVAJAL APN

Nurse Practitioner (Family)

259 E ERIE ST FL 16
CHICAGO, IL 60611

Cook County (312) 695-6868

DR. KATHRYN NOTH TOMASINO PH.D.

Psychologist (Clinical)

259 E ERIE ST FL 16, LAVIN FAMILY PAVILION
CHICAGO, IL 60611

Cook County (312) 629-2620

RICHARD GREEN MD

Internal Medicine (Gastroenterology)

259 E ERIE ST FL 16
CHICAGO, IL 60611

Cook County (312) 695-5620

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 Alexandra Baumann's NPI number?

The NPI number for Alexandra Baumann is 1124380332. It was assigned to this individual provider in the NPPES registry on June 13, 2012.

Where is Alexandra Baumann located?

Alexandra Baumann practices at 259 E Erie St Fl 16, Chicago, IL 60611. The listed phone number is (312) 695-5620.

What is Alexandra Baumann's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

Is Alexandra Baumann enrolled in Medicare?

Yes. Alexandra Baumann 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.

Which organization bills Medicare for Alexandra Baumann's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Alexandra Baumann reassigns Medicare benefits to Northwestern Medical Faculty Foundation (Carol Stream, IL). The 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 Alexandra Baumann's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Alexandra Baumann affiliated with any hospitals?

According to CMS data, Alexandra Baumann is affiliated with Northwestern Lake Forest Hospital and Northwestern Memorial Hospital.

When was this NPI record last updated?

The NPPES record for Alexandra Baumann was last updated on December 6, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.