MONA LALEHZARI MD
NPI 1952838526
Internal Medicine - Gastroenterology in Chicago, IL

Q: What is Mona Lalehzari's NPI number?

The NPI number for Mona Lalehzari is 1952838526. It was assigned to this individual provider in the NPPES registry on May 15, 2017.

Q: What is Mona Lalehzari'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 Mona Lalehzari was last updated on April 21, 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.

Active since May 15, 2017PECOS EnrolledAccepts Medicare Assignment

3000 N HALSTED ST STE 623, CHICAGO, IL 60657(773) 281-5818 Get Directions Write a Review

NPPES record last updated: April 21, 2025. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Jul 11, 2023, May 15, 2017 (2 updates tracked since 2017).

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About Mona Lalehzari Md NPPES

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

MONA LALEHZARI MD (NPI 1952838526) is an individual gastroenterology provider in Chicago, Illinois, licensed in Illinois (036.152135) and active in the NPI registry since May 2017. She is enrolled in Medicare PECOS, is affiliated with Advocate Illinois Masonic Medical Center, and is a graduate of Medical College Of Wisconsin (2017).

NPPES Registry Identity

NPI1952838526

Entity TypeIndividualFemale

Primary Taxonomy207RG0100X

Provider Legal NameMONA LALEHZARICredential: MD

Location Address3000 N HALSTED ST STE 623Chicago, IL 60657-5196

Mailing Address3000 N Halsted St Ste 623Chicago, IL 60657-5196 · (773) 281-5818 · Fax (773) 281-6895

Phone(773) 281-5818

Sole ProprietorYes

Medical School CMSMedical College Of WisconsinGraduated 2017

Enumeration DateMay 15, 2017

Last NPPES UpdateApril 21, 20252 updates tracked since enumeration

NPPES CertifiedApril 21, 2025

✔ NPI 1952838526 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

License✔ Licensed in IL · 036.152135

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.

3000 N HALSTED ST STE 623, Chicago, IL 60657

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Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

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

Mona Lalehzari 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 ID3870863228

PECOS Enrollment IDI20230525001607

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 Mona Lalehzari reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Advanced Gi, LLC

Same address

Gastroenterology

3000 N HALSTED ST STE 623
Chicago, IL 60657

Reassigned Medicare billing, Illinois enrollment
5 clinicians in this Medicare group

NPI 1942795422 (773) 281-5818

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 9

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.

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.

39 services39 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

37 services21 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.

32 services24 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.

16 services16 patients

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.

15 services14 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

14 services14 patients

Hospital Affiliations CMS Care Compare 2

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

Advocate Illinois Masonic Medical Center

Acute Care Hospitals · Chicago, IL

3/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number140182

Location836 West Wellington AvenueChicago, IL 60657 · Cook County

Emergency services Birthing friendly

Presence Saint Joseph Hospital - Chicago

Acute Care Hospitals · Chicago, IL

4/5 CMS rating

OwnershipVoluntary non-profit - Church

CMS Certification Number140224

Location2900 North Lake Shore DriveChicago, IL 60657 · Cook County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60657 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.

Other Providers at the Same Location NPPES 6

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

CHIYOKO RANDO PA-C

Physician Assistant