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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. KAREN A DECOCKER DNP, PMHNP
NPI 1629273834
Nurse Practitioner - Psychiatric/Mental Health in Oak Brook, IL

Active since June 18, 2007PECOS Enrolled
1100 JORIE BLVD STE 300, OAK BROOK, IL 60523(630) 974-6602(630) 487-2411 Get Directions Write a Review

NPPES record last updated: October 7, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Oct 7, 2026, Mar 7, 2025, Oct 17, 2023 and 3 more (6 updates tracked since 2015).

About Dr. Karen A Decocker Dnp, Pmhnp NPPES

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

DR. KAREN A DECOCKER DNP, PMHNP (NPI 1629273834) is an individual psychiatric/mental health provider in Oak Brook, Illinois, licensed in Illinois (277.003915) and active in the NPI registry since June 2007. She is enrolled in Medicare PECOS and maintains a secondary practice location in Three Oaks.

NPPES Registry Identity

NPI1629273834
Entity TypeIndividualFemale
Primary Taxonomy363LP0808X
Provider Legal NameDR. KAREN A DECOCKERCredential: DNP, PMHNP
Location Address1100 JORIE BLVD STE 300Oak Brook, IL 60523-2219
Mailing Address8000 Warren Woods Rd Lot 68Three Oaks, MI 49128-9573 · (574) 220-4676
Phone(630) 974-6602
Fax(630) 487-2411
Sole ProprietorNo
Enumeration DateJune 18, 2007
Last NPPES UpdateOctober 7, 20266 updates tracked since enumeration
NPPES CertifiedOctober 7, 2026
✔ NPI 1629273834 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · Psychiatric/Mental HealthPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LP0808X
License✔ Licensed in IL · 277.003915
1100 JORIE BLVD STE 300, Oak Brook, IL 60523
Open in Google Maps ↗

Other Names 1

Former Name (1)Karen Ann Sandock

Secondary Practice Location 1

Location 18000 Warren Woods Rd Lot 68Three Oaks, MI 49128-9573 · Phone (708) 263-4650

Other Identifiers 1

Medicaid5215366MI

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include 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)

Dr. Karen A Decocker Dnp, Pmhnp 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 Reassignments

2

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

Rush University Medical Center
1.1 mi
Internal Medicine
2011 YORK ROAD, 2ND FLOOR
Oak Brook, IL 60523
  • Reassigned Medicare billing, Illinois enrollment
  • Medicare enrollment name: Rush University Medical Group
  • 2,169 clinicians in this Medicare group
NPI 1801375696 (630) 724-1310
Lipov Medical Sc
2.4 mi
Psychiatry
1 E OAKHILL DR STE 100
Westmont, IL 60559
  • Reassigned Medicare billing, Illinois enrollment
  • 7 clinicians in this Medicare group
NPI 1396426359 (937) 838-0568

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60523 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 7

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

ALLISON HASENMILLER LCSW
Social Worker (Clinical)
1100 JORIE BLVD STE 300
OAK BROOK, IL 60523
Dupage County (630) 974-6602
MR. CHRISTIAN LEDEZMA
Counselor (Mental Health)
1100 JORIE BLVD STE 300
OAK BROOK, IL 60523
Dupage County (630) 974-6602
TMS CLINICAL SERVICES PLLC
Psychiatry & Neurology (Psychiatry)
1100 JORIE BLVD STE 300
OAK BROOK, IL 60523
Dupage County (630) 974-6602
MRS. SABRINA F CONNELLY LCSW
Social Worker (Clinical)
1100 JORIE BLVD STE 300
OAK BROOK, IL 60523
Dupage County (630) 974-6602
KETRINA PREMTI M.A., LPC
Counselor (Professional)
1100 JORIE BLVD STE 300
OAK BROOK, IL 60523
Dupage County (630) 974-6602
CHRISTINA BORGHESE
Counselor (Mental Health)
1100 JORIE BLVD STE 300
OAK BROOK, IL 60523
Dupage County (630) 974-6602
TERESA J POPRAWSKI M.D.
Psychiatry & Neurology (Psychiatry)
1100 JORIE BLVD STE 300
OAK BROOK, IL 60523
Dupage County (847) 877-0454

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 Karen Decocker's NPI number?

The NPI number for Karen Decocker is 1629273834. It was assigned to this individual provider in the NPPES registry on June 18, 2007. The provider is also known as Karen Ann Sandock.

Where is Karen Decocker located?

Karen Decocker practices at 1100 Jorie Blvd Ste 300, Oak Brook, IL 60523. The listed phone number is (630) 974-6602.

What is Karen Decocker's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Psychiatric/Mental Health, with taxonomy code 363LP0808X.

Is Karen Decocker enrolled in Medicare?

Yes. Karen Decocker is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Karen Decocker's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Karen Decocker reassigns Medicare benefits to 2 organizations: Rush University Medical Center (Oak Brook, IL) and Lipov Medical Sc (Westmont, 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 Karen Decocker's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Karen Decocker accept?

Health plans from Oscar Health list Karen Decocker 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 Karen Decocker was last updated on October 7, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.