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

DR. LYDIA CHRISTINA SITTER AUD
NPI 1346660446
Audiologist in Dixon, IL

Active since April 16, 2014Accepts Medicare Assignment
215 3. 1ST STREET, SUITE 317, KSB MEDICAL GROUP, DIXON, IL 61021(815) 285-5918(815) 285-5592 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Sep 29, 2026, Feb 15, 2022, Oct 8, 2019 and 1 more (4 updates tracked since 2018).

About Dr. Lydia Christina Sitter Aud NPPES

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

DR. LYDIA CHRISTINA SITTER AUD (NPI 1346660446) is an individual audiologist in Dixon, Illinois, licensed in Illinois (147001487) and active in the NPI registry since April 2014. She is a graduate of University Of Illinois College Of Med (chi/peor/rock/chm-urb) (2012).

NPPES Registry Identity

NPI1346660446
Entity TypeIndividualFemale
Primary Taxonomy231H00000X
Provider Legal NameDR. LYDIA CHRISTINA SITTERCredential: AUD
Location Address215 3. 1ST STREET, SUITE 317, KSB MEDICAL GROUPDixon, IL 61021
Mailing Address215 E. 1st Street, Suite 317, Ksb Medical GroupDixon, IL 61021 · (815) 285-5918 · Fax (815) 285-5592
Phone(815) 285-5918
Fax(815) 285-5592
Sole ProprietorNo
Medical School CMSUniversity Of Illinois College Of Med (chi/peor/rock/chm-urb)Graduated 2012
Enumeration DateApril 16, 2014
Last NPPES UpdateSeptember 29, 20264 updates tracked since enumeration
NPPES CertifiedFebruary 15, 2022
✔ NPI 1346660446 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAudiologistSpeech, Language and Hearing Service Providers
Taxonomy Code231H00000X
License✔ Licensed in IL · 147001487
Definition
(1) A specialist in evaluation, habilitation and rehabilitation of those whose communication disorders center in whole or in part in hearing function. Audiologists are autonomous professionals who identify, assess, and manage disorders of the auditory, balance and other neural systems. Audiologists provide audiological (aural) rehabilitation to children and adults across the entire age span. Audiologists select, fit and dispense amplification systems such as hearing aids and related devices. (2) An audiologist is a person qualified by a master's degree in audiology, licensed by the state, where applicable, and practicing within the scope of that license. Audiologists evaluate and treat patients with impaired hearing. They plan, direct and conduct rehabilitative programs with audiotry substitutional devises (hearing aids) and other therapy.
215 3. 1ST STREET, SUITE 317, Dixon, IL 61021
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Other Names 1

Other Name (5)Lydia Sitter Aud

Other Identifiers 1

OtherF400292864IL · Medicare

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. Lydia Christina Sitter Aud 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 ID1254659022
PECOS Enrollment IDI20150408001080

Medicare Billing Reassignments

2

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

Ksb Medical Group, Inc.
Same address
Clinic/Center
215 E 1ST ST, STE 101
Dixon, IL 61021
  • Reassigned Medicare billing, Illinois enrollment
  • 130 clinicians in this Medicare group
NPI 1629046115 (815) 285-5973
Awender Audiology In-Home Hearing Healthcare Sc
32 mi
Audiologist
750 KIWANIS DR, SUITE 200
Freeport, IL 61032
  • Reassigned Medicare billing, Illinois enrollment
  • 2 clinicians in this Medicare group
NPI 1477004075 (815) 704-3277

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 2

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.

Test for hearing various pitches using earphone 92552
This is a hearing test where earphones are worn to detect different pitch levels. Sounds of various frequencies are played, and you indicate when you hear them. This helps evaluate your hearing ability. It's safe, comfortable, and non-invasive.
70 services69 patients
Test for ability to detect and repeat spoken words with speech recognition 92556
This is a hearing test where you'll listen to spoken words through headphones and repeat them. It helps evaluate your ability to understand speech. It's a simple, non-invasive procedure that provides valuable information about your hearing health.
69 services68 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 61021 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
$54.80 typical visit price
range $54.80 – $168.44
Typical copayment $13.70 (range $13.70 – $42.11)
Most-billed visit code 99202
Established Patient
$68.64 typical visit price
range $17.16 – $136.56
Typical copayment $17.16 (range $4.29 – $34.14)
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.

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 Lydia Sitter's NPI number?

The NPI number for Lydia Sitter is 1346660446. It was assigned to this individual provider in the NPPES registry on April 16, 2014. The provider is also known as Lydia Sitter Aud.

Where is Lydia Sitter located?

Lydia Sitter practices at 215 3. 1st Street, Suite 317 Ksb Medical Group, Dixon, IL 61021. The listed phone number is (815) 285-5918.

What is Lydia Sitter's specialty?

The primary specialty registered for this NPI is Audiologist with taxonomy code 231H00000X.

Is Lydia Sitter enrolled in Medicare?

Yes. Lydia Sitter 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 Lydia Sitter's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Lydia Sitter reassigns Medicare benefits to 2 organizations: Ksb Medical Group, Inc. (Dixon, IL) and Awender Audiology In-Home Hearing Healthcare Sc (Freeport, 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 Lydia Sitter's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Lydia Sitter was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 35 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.