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DR. KATELYN OSTENDORF STEPAN MD
NPI 1326468489
Otolaryngology in Chicago, IL

Active since April 16, 2014PECOS EnrolledAccepts Medicare Assignment
94.1/100
CMS Quality Rating
676 N SAINT CLAIR ST STE 1200, CHICAGO, IL 60611(312) 695-8182(312) 695-4303 Get Directions Write a Review

NPPES record last updated: April 6, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 6, 2026, Oct 7, 2020, Jul 2, 2019 (3 updates tracked since 2019).

About Dr. Katelyn Ostendorf Stepan Md NPPES

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

DR. KATELYN OSTENDORF STEPAN MD (NPI 1326468489) is an individual otolaryngology provider in Chicago, Illinois, licensed in Illinois (036153453) and active in the NPI registry since April 2014. She is enrolled in Medicare PECOS, is affiliated with Northwestern Lake Forest Hospital, and maintains a secondary practice location in Saint Louis.

NPPES Registry Identity

NPI1326468489
Entity TypeIndividualFemale
Primary Taxonomy207Y00000X
Provider Legal NameDR. KATELYN OSTENDORF STEPANCredential: MD
Location Address676 N SAINT CLAIR ST STE 1200Chicago, IL 60611-3068
Mailing Address676 N Saint Clair St Ste 1200Chicago, IL 60611-3068 · (312) 695-8182 · Fax (312) 695-4303
Phone(312) 695-8182
Fax(312) 695-4303
Sole ProprietorNo
Medical School CMSWashington University School Of MedicineGraduated 2014
Enumeration DateApril 16, 2014
Last NPPES UpdateApril 6, 20263 updates tracked since enumeration
NPPES CertifiedApril 6, 2026
✔ NPI 1326468489 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOtolaryngologyAllopathic & Osteopathic Physicians
Taxonomy Code207Y00000X
Licenses✔ Licensed in IL · 036153453✔ Licensed in MO · 2019013305
Definition
An otolaryngologist-head and neck surgeon provides comprehensive medical and surgical care for patients with diseases and disorders that affect the ears, nose, throat, the respiratory and upper alimentary systems and related structures of the head and neck. An otolaryngologist diagnoses and provides medical and/or surgical therapy or prevention of diseases, allergies, neoplasms, deformities, disorders and/or injuries of the ears, nose, sinuses, throat, respiratory and upper alimentary systems, face, jaws and the other head and neck systems. Head and neck oncology, facial plastic and reconstructive surgery and the treatment of disorders of hearing and voice are fundamental areas of expertise.
676 N SAINT CLAIR ST STE 1200, Chicago, IL 60611
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Secondary Practice Location 1

Location 14921 Parkview Pl, Ste 11ASaint Louis, MO 63110-1032 · Phone (314) 362-7509 · Fax (314) 747-5593

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. Katelyn Ostendorf Stepan 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 ID4587900626
PECOS Enrollment IDI20200902001306
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

2

Medicare enrollment records show Katelyn Stepan reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Central Dupage Hospital Association
28 mi
General Acute Care Hospital
25 NORTH WINFIELD RD.
Winfield, IL 60190
  • Reassigned Medicare billing, Illinois enrollment
  • 129 clinicians in this Medicare group
NPI 1003864810 (630) 933-1600
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 7

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.

Diagnostic exam of voice box using a flexible endoscope 31575
This procedure involves a doctor examining your voice box using a flexible endoscope, a thin tube with a light and camera. It's inserted through your nose or mouth to visualize your throat area. It helps detect any abnormalities in your voice box, ensuring optimal vocal health.
168 services108 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.
159 services117 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.
62 services48 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
54 services43 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.
36 services36 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.
22 services22 patients

Hospital Affiliations CMS Care Compare 5

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 Medicine Delnor Community Hospital

Acute Care Hospitals · Geneva, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140211
Location300 Randall RdGeneva, IL 60134 · Kane County
Emergency services Birthing friendly

Northwestern Medicine Central Dupage Hospital

Acute Care Hospitals · Winfield, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140242
Location25 North Winfield RoadWinfield, IL 60190 · Du Page 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

Northwestern Medicine Kishwaukee Hospital

Acute Care Hospitals · Dekalb, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140286
LocationOne Kish Hospital DriveDekalb, IL 60115 · De Kalb 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
$74.80 typical visit price
range $18.97 – $148.12
Typical copayment $18.70 (range $4.74 – $37.03)
Most-billed visit code 99213
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
Quality82.59
Promoting Interoperability100
Improvement Activities40

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Enteral feeding supply kit; syringe fed, per day, includes but not limited to feeding/flushing syringe, administration set tubing, dressings, tape B4034
Other-Enteral and Parenteral · category OB006N
2 suppliers16 claims330 services$2.68 avg. paid by Medicare
Enteral formula, nutritionally complete, calorically dense (equal to or greater than 1.5 kcal/ml) with intact nutrients, includes proteins, fats, carbohydrates, vitamins and minerals, may include fiber, administered through an enteral feeding tube, 100 calories = 1 unit B4152
Other-Enteral and Parenteral · category OB006N
2 suppliers16 claims9,008 services$0.28 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

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.

DR. WHITNEY E. LIDDY M.D.
Otolaryngology
676 N SAINT CLAIR ST STE 1200
CHICAGO, IL 60611
Cook County (312) 695-8182
ROBERT KERN MD
Otolaryngology
676 N SAINT CLAIR ST STE 1200
CHICAGO, IL 60611
Cook County (312) 695-8182
MONICA THOMAS AU.D.
Audiologist
676 N SAINT CLAIR ST STE 1200
CHICAGO, IL 60611
Cook County (312) 695-8182
CHRISTINE HUANG PA-C
Physician Assistant
676 N SAINT CLAIR ST STE 1200
CHICAGO, IL 60611
Cook County (312) 695-8182
KRISTINA GRACE JOHNSON PA-C
Physician Assistant
676 N SAINT CLAIR ST STE 1200
CHICAGO, IL 60611
Cook County (312) 695-8182
SAKINA NELLES RN
Registered Nurse
676 N SAINT CLAIR ST STE 1200
CHICAGO, IL 60611
Cook County (312) 695-0562
MS. KATY YASER HASSAN PA-C
Physician Assistant (Medical)
676 N SAINT CLAIR ST STE 1200
CHICAGO, IL 60611
Cook County (312) 695-8182
PATRICK TYLER MURPHY
Physician Assistant
676 N SAINT CLAIR ST STE 1200
CHICAGO, IL 60611
Cook County (312) 695-8182

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 Katelyn Stepan's NPI number?

The NPI number for Katelyn Stepan is 1326468489. It was assigned to this individual provider in the NPPES registry on April 16, 2014.

Where is Katelyn Stepan located?

Katelyn Stepan practices at 676 N Saint Clair St Ste 1200, Chicago, IL 60611. The listed phone number is (312) 695-8182.

What is Katelyn Stepan's specialty?

The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.

Is Katelyn Stepan enrolled in Medicare?

Yes. Katelyn Stepan 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 organizations bill Medicare for Katelyn Stepan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Katelyn Stepan reassigns Medicare benefits to 2 organizations: Central Dupage Hospital Association (Winfield, IL) and Northwestern Medical Faculty Foundation (Carol Stream, IL). 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 Katelyn Stepan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Katelyn Stepan affiliated with any hospitals?

According to CMS data, Katelyn Stepan is affiliated with Northwestern Lake Forest Hospital, Northwestern Medicine Delnor Community Hospital, Northwestern Medicine Central Dupage Hospital, Northwestern Memorial Hospital and Northwestern Medicine Kishwaukee Hospital.

When was this NPI record last updated?

The NPPES record for Katelyn Stepan was last updated on April 6, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.