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CLAUS J FIMMEL MD
NPI 1568417780
Internal Medicine - Gastroenterology in Northbrook, IL

Active since May 24, 2006PECOS EnrolledAccepts Medicare Assignment
93.08/100
CMS Quality Rating
40 SKOKIE BLVD., SUITE 110, NORTHBROOK, IL 60062(224) 407-4400(224) 407-2255 Get Directions Write a Review

NPPES record last updated: November 19, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Claus J Fimmel Md NPPES

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

CLAUS J FIMMEL MD (NPI 1568417780) is an individual gastroenterology provider in Northbrook, Illinois, licensed in Illinois (036115700) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and is a graduate of Other (1981).

NPPES Registry Identity

NPI1568417780
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameCLAUS J FIMMELCredential: MD
Location Address40 SKOKIE BLVD., SUITE 110Northbrook, IL 60062-1614
Mailing Address950 Technology Way, Suite 250Libertyville, IL 60048-5366 · (224) 407-4400 · Fax (224) 407-2255
Phone(224) 407-4400
Fax(224) 407-2255
Sole ProprietorNo
Medical School CMSOtherGraduated 1981
Enumeration DateMay 24, 2006
Last NPPES UpdateNovember 19, 2025
NPPES CertifiedNovember 19, 2025
✔ NPI 1568417780 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Licenses✔ Licensed in IL · 036115700✔ Licensed in WI · 13614-320
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 036115700 (IL)
40 SKOKIE BLVD., Northbrook, IL 60062
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Anthem Blue Cross and Blue Shield.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

Claus J Fimmel 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 ID3375508609
PECOS Enrollment IDI20250723004030
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 8

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.

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.
47 services46 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.
29 services20 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
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.
15 services15 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
15 services15 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.
15 services15 patients

Hospital Affiliations CMS Care Compare 3

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

Northshore University Healthsystem - Evanston Hospital

Acute Care Hospitals · Evanston, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number140010
Location2650 Ridge AveEvanston, IL 60201 · Cook County
Emergency services Birthing friendly

St Vincent Hospital

Acute Care Hospitals · Green Bay, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Church
CMS Certification Number520075
Location835 S Van Buren StGreen Bay, WI 54301 · Brown County
Emergency services Birthing friendly

St Mary's Hospital Medical Center

Acute Care Hospitals · Green Bay, WI
4/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number520097
Location1726 Shawano AveGreen Bay, WI 54303 · Brown County
Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60062 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.

93.08/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality80.79
Promoting Interoperability100
Improvement Activities40

Other Providers at the Same Location NPPES 4

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

BRETT RIEDERMAN MD
Internal Medicine
40 SKOKIE BLVD., SUITE 110
NORTHBROOK, IL 60062
Cook County (224) 407-4400
DR. TARA N TROY MD.
Specialist
40 SKOKIE BLVD., SUITE 110
NORTHBROOK, IL 60062
Cook County (224) 407-4400
GENE Z CHIAO MD
Internal Medicine
40 SKOKIE BLVD., SUITE 110
NORTHBROOK, IL 60062
Cook County (224) 207-4400
KRISTHINE FIDEL NAGUE NP
Clinical Nurse Specialist (Family Health)
40 SKOKIE BLVD., SUITE 110
NORTHBROOK, IL 60062
Cook County (224) 407-4400

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 Claus Fimmel's NPI number?

The NPI number for Claus Fimmel is 1568417780. It was assigned to this individual provider in the NPPES registry on May 24, 2006.

Where is Claus Fimmel located?

Claus Fimmel practices at 40 Skokie Blvd. Suite 110, Northbrook, IL 60062. The listed phone number is (224) 407-4400.

What is Claus Fimmel's specialty?

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

Is Claus Fimmel enrolled in Medicare?

Yes. Claus Fimmel 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.

What insurance does Claus Fimmel accept?

Health plans from Anthem Blue Cross and Blue Shield list Claus Fimmel 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.

Is Claus Fimmel affiliated with any hospitals?

According to CMS data, Claus Fimmel is affiliated with Northshore University Healthsystem - Evanston Hospital, St Vincent Hospital and St Mary's Hospital Medical Center.

When was this NPI record last updated?

The NPPES record for Claus Fimmel was last updated on November 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.