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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.

TERESA A. FESEN FNP-BC
NPI 1437402575
Nurse Practitioner - Family in Springfield, IL

Active since October 25, 2012PECOS EnrolledAccepts Medicare Assignment
751 N RUTLEDGE ST, SUITE 0300, SPRINGFIELD, IL 62702(217) 545-8000(217) 545-1229 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: November 08, 2026.

Record update history: Sep 29, 2026, Oct 21, 2020, Jun 21, 2017 and 1 more (4 updates tracked since 2016).

About Teresa A. Fesen Fnp-bc NPPES

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

TERESA A. FESEN FNP-BC (NPI 1437402575) is an individual family provider in Springfield, Illinois, licensed in Illinois (209009955) and active in the NPI registry since October 2012. She is enrolled in Medicare PECOS and is a graduate of Other (2012).

NPPES Registry Identity

NPI1437402575
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameTERESA A. FESENCredential: FNP-BC
Location Address751 N RUTLEDGE ST, SUITE 0300Springfield, IL 62702-4968
Mailing Address751 N Rutledge St, Po Box 19654Springfield, IL 62702-4968 · (217) 545-8000 · Fax (217) 545-1229
Phone(217) 545-8000
Fax(217) 545-1229
Sole ProprietorNo
Medical School CMSOtherGraduated 2012
Enumeration DateOctober 25, 2012
Last NPPES UpdateSeptember 29, 20264 updates tracked since enumeration
NPPES CertifiedOctober 21, 2020
✔ NPI 1437402575 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in IL · 209009955
751 N RUTLEDGE ST, Springfield, IL 62702
Open in Google Maps ↗

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

Teresa A. Fesen Fnp-bc 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 ID8022261569
PECOS Enrollment IDI20130110000617
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 Teresa Fesen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Siu Physicians & Surgeons, Inc
0.5 mi
Endocrinology, Diabetes & Metabolism
201 E MADISON ST STE 328
Springfield, IL 62702
  • Reassigned Medicare billing, Illinois enrollment
  • 645 clinicians in this Medicare group
NPI 1558385989 (217) 545-8000

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 5

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.
111 services75 patients
Hemoglobin a1c level 83036
Hemoglobin A1c (HbA1c) is a test that measures your average blood sugar level over the past 2-3 months. It's used to monitor how well diabetes is being controlled. High levels may indicate that your diabetes treatment plan needs adjustment.
64 services57 patients
Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report 95251
This procedure involves placing a small sensor under your skin to continuously monitor your blood sugar levels in tissue fluid. The data is interpreted and a report is generated to help manage your diabetes more effectively.
59 services38 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 services42 patients
Creatinine level to test for kidney function or muscle injury 82570
A creatinine level test measures the amount of creatinine in your blood. This substance is a waste product from normal muscle use. Higher levels can indicate possible kidney dysfunction or muscle injury. This test helps monitor kidney health.
16 services16 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 62702 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
$85.71 typical visit price
range $54.80 – $168.44
Typical copayment $21.42 (range $13.70 – $42.11)
Most-billed visit code 99203
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.

Referred Medical Equipment & Supplies CMS DME claims 3

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

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
37 suppliers136 claims463 services$5.58 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
18 suppliers37 claims59 services$1.06 avg. paid by Medicare
Supply allowance for therapeutic continuous glucose monitor (cgm), includes all supplies and accessories, 1 month supply = 1 unit of service K0553
DME-Other DME · category DE017N
6 suppliers171 claims171 services$186.54 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.

ZACHARIAH GURNSEY MD
Internal Medicine
751 N RUTLEDGE ST, STE 1100
SPRINGFIELD, IL 62702
Sangamon County (217) 545-0182
CATHERINE A NARITOKU R.D.
Dietitian, Registered
751 N RUTLEDGE ST, LOWER LEVEL
SPRINGFIELD, IL 62702
Sangamon County (217) 545-0182
MRS. LUCINDA S BUESCHER M.D.
Dermatology
751 N RUTLEDGE ST
SPRINGFIELD, IL 62702
Sangamon County (217) 545-3821
JAMES M GILCHRIST MD
Psychiatry & Neurology (Clinical Neurophysiology)
751 N RUTLEDGE ST, STE 3100
SPRINGFIELD, IL 62702
Sangamon County (217) 545-8000
DR. AKSHRA VERMA MD, MS
Internal Medicine
751 N RUTLEDGE ST, STE 1100
SPRINGFIELD, IL 62702
Sangamon County (217) 545-0182
CYNTHIA A MICHAEL MD
Internal Medicine (Pulmonary Disease)
751 N RUTLEDGE ST
SPRINGFIELD, IL 62702
Sangamon County (217) 545-8000
TILITHA S SHAWGO
Clinical Nurse Specialist (Acute Care)
751 N RUTLEDGE ST
SPRINGFIELD, IL 62702
Sangamon County (217) 545-4421
REBECCA J LARSON MD
Dermatology (MOHS-Micrographic Surgery)
751 N RUTLEDGE ST, SUITE 2300
SPRINGFIELD, IL 62702
Sangamon County (217) 545-8000

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 Teresa Fesen's NPI number?

The NPI number for Teresa Fesen is 1437402575. It was assigned to this individual provider in the NPPES registry on October 25, 2012.

Where is Teresa Fesen located?

Teresa Fesen practices at 751 N Rutledge St Suite 0300, Springfield, IL 62702. The listed phone number is (217) 545-8000.

What is Teresa Fesen's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

Is Teresa Fesen enrolled in Medicare?

Yes. Teresa Fesen 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 organization bills Medicare for Teresa Fesen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Teresa Fesen reassigns Medicare benefits to Siu Physicians & Surgeons, Inc (Springfield, 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 Teresa Fesen'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 Teresa Fesen 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 45 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.