Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

NADEEM SIDDIQUI MD
NPI 1770577785
Internal Medicine - Gastroenterology in Mchenry, IL

Q: What is Nadeem Siddiqui's NPI number?

The NPI number for Nadeem Siddiqui is 1770577785. It was assigned to this individual provider in the NPPES registry on September 6, 2005.

Q: What is Nadeem Siddiqui'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 Nadeem Siddiqui was last updated on June 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 56 days 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 September 06, 2005PECOS EnrolledAccepts Medicare Assignment

4309 W MEDICAL CENTER DR STE B202, MCHENRY, IL 60050(847) 535-6083(815) 455-2789 Get Directions Write a Review

NPPES record last updated: June 24, 2026. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Jul 3, 2025, Jun 12, 2019 (2 updates tracked since 2019).

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About Nadeem Siddiqui Md NPPES

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

NADEEM SIDDIQUI MD (NPI 1770577785) is an individual gastroenterology provider in Mchenry, Illinois, licensed in Illinois (036175750) and active in the NPI registry since September 2005. He is enrolled in Medicare PECOS, is affiliated with Northwestern Medicine Mchenry, and is a graduate of Other (1990).

NPPES Registry Identity

NPI1770577785

Entity TypeIndividualMale

Primary Taxonomy207RG0100X

Provider Legal NameNADEEM SIDDIQUICredential: MD

Location Address4309 W MEDICAL CENTER DR STE B202Mchenry, IL 60050-8417

Mailing AddressPo Box 735044Chicago, IL 60673-5044 · (800) 326-2250

Phone(847) 535-6083

Fax(815) 455-2789

Sole ProprietorNo

Medical School CMSOtherGraduated 1990

Enumeration DateSeptember 6, 2005

Last NPPES UpdateJune 24, 20262 updates tracked since enumeration

NPPES CertifiedJune 24, 2026

✔ NPI 1770577785 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians

Taxonomy Code207RG0100X

Licenses✔ Licensed in IL · 036175750✔ Licensed in WI · 35007

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.

4309 W MEDICAL CENTER DR STE B202, Mchenry, IL 60050

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Other Identifiers 1

Medicaid33328600WI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include CareSource (Common Ground Healthcare), HealthPartners.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

Nadeem Siddiqui 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 ID6507862315

PECOS Enrollment IDI20061018000040

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.

Areas of Expertise CMS Part B claims 3

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.

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.

94 services90 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.

36 services36 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

16 services14 patients

Hospital Affiliations CMS Care Compare 2

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

Northwestern Medicine Mchenry

Acute Care Hospitals · Mchenry, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number140116

Location4201 Medical Center DriveMchenry, IL 60050 · Mc Henry County

Emergency services Birthing friendly

St. Agnes Hospital Hospice

Acute Care Hospitals · Fond Du Lac, WI

4/5 CMS rating

OwnershipVoluntary non-profit - Private

CMS Certification Number520088

Location430 E Division StFond Du Lac, WI 54935 · Fond Du Lac County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60050 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

$127.46 typical visit price

range $54.80 – $168.44

Typical copayment $31.86 (range $13.70 – $42.11)

Most-billed visit code 99204

Established Patient

$97.25 typical visit price

range $17.16 – $136.56

Typical copayment $24.31 (range $4.29 – $34.14)

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 18

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

ANNA LAKOMA KUIKEN MD

Surgery