1. Home
  2. Directory
  3. Illinois
  4. Mokena
  5. Nurse Practitioner
  6. NPI Profile

THERESA M SAWYER FNP-BC
NPI 1376178889
Nurse Practitioner in Mokena, IL

Active since March 04, 2020PECOS Enrolled
21205 OWENS RD STE 3, MOKENA, IL 60448(815) 469-2123(815) 469-2149 Get Directions Write a Review

NPPES record last updated: March 1, 2022. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Mar 1, 2022, Mar 4, 2020 (2 updates tracked since 2020).

About Theresa M Sawyer Fnp-bc NPPES

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

THERESA M SAWYER FNP-BC (NPI 1376178889) is an individual nurse practitioner in Mokena, Illinois, licensed in Illinois (209020573) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1376178889
Entity TypeIndividualFemale
Primary Taxonomy363L00000X
Provider Legal NameTHERESA M SAWYERCredential: FNP-BC
Location Address21205 OWENS RD STE 3Mokena, IL 60448-2023
Mailing Address21205 Owens Rd Ste 3Mokena, IL 60448-2023 · (815) 469-2123 · Fax (815) 469-2149
Phone(815) 469-2123
Fax(815) 469-2149
Sole ProprietorNo
Enumeration DateMarch 4, 2020
Last NPPES UpdateMarch 1, 20222 updates tracked since enumeration
NPPES CertifiedMarch 1, 2022
✔ NPI 1376178889 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363L00000X
License✔ Licensed in IL · 209020573
Definition
(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.
21205 OWENS RD STE 3, Mokena, IL 60448
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter Health, Ambetter Health of Delaware, Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Theresa M Sawyer Fnp-bc is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

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

Health Service Systems, Inc
5.4 mi
Internal Medicine
1851 SILVER CROSS BOULEVARD, SUITE 110
New Lenox, IL 60451
  • Reassigned Medicare billing, Illinois enrollment
  • 133 clinicians in this Medicare group
NPI 1851323257 (815) 300-3060

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.

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.
17 services17 patients
Annual depression screening, 5 to 15 minutes G0444
An annual depression screening is a short, routine evaluation to check for signs of depression. It involves answering a series of questions about your feelings, thoughts, and behaviors. The process takes about 15 minutes and helps detect depression early for better management.
11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60448 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
$93.02 typical visit price
range $59.81 – $181.38
Typical copayment $23.25 (range $14.95 – $45.34)
Most-billed visit code 99203
Established Patient
$105.07 typical visit price
range $19.15 – $147.12
Typical copayment $26.26 (range $4.78 – $36.78)
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 8

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

STEVEN JOHN ANTONINI MD
Pediatrics
21205 OWENS RD STE 3
MOKENA, IL 60448
Will County (815) 469-2123
HEDGES CLINIC SERVICE CORP
Family Medicine
21205 OWENS RD STE 3
MOKENA, IL 60448
Will County (815) 469-2123
MRS. JENNIFER JOHNSON NP-C
Nurse Practitioner (Family)
21205 OWENS RD STE 3
MOKENA, IL 60448
Will County (815) 469-2123
AILEEN MAE DONAUSKY MD
Pediatrics
21205 OWENS RD STE 3
MOKENA, IL 60448
Will County (815) 469-2123
CHRISTOPHER WILLIAM UDOVICH MD
Family Medicine
21205 OWENS RD STE 3
MOKENA, IL 60448
Will County (815) 469-2123
OREST ROSTYSLAW HORODYSKY MD
Internal Medicine
21205 OWENS RD STE 3
MOKENA, IL 60448
Will County (815) 469-2123
JULIE LIMON MD
Family Medicine
21205 OWENS RD STE 3
MOKENA, IL 60448
Will County (815) 469-2123
MICHAEL REMY DEMAERTELAERE DO
Family Medicine
21205 OWENS RD STE 3
MOKENA, IL 60448
Will County (815) 469-2123

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 Theresa Sawyer's NPI number?

The NPI number for Theresa Sawyer is 1376178889. It was assigned to this individual provider in the NPPES registry on March 4, 2020.

Where is Theresa Sawyer located?

Theresa Sawyer practices at 21205 Owens Rd Ste 3, Mokena, IL 60448. The listed phone number is (815) 469-2123.

What is Theresa Sawyer's specialty?

The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.

Is Theresa Sawyer enrolled in Medicare?

Yes. Theresa Sawyer is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for Theresa Sawyer's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Theresa Sawyer reassigns Medicare benefits to Health Service Systems, Inc (New Lenox, IL). The 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 Theresa Sawyer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Theresa Sawyer accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Oscar Health list Theresa Sawyer 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.

When was this NPI record last updated?

The NPPES record for Theresa Sawyer was last updated on March 1, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.