LINDEN OAKS HOSPITAL
NPI 1871628362
Psychiatric Hospital in Naperville, IL
About Linden Oaks Hospital NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
LINDEN OAKS HOSPITAL (NPI 1871628362) is a healthcare organization registered as a psychiatric hospital in Naperville, Illinois and active in the NPI registry since February 2007. The organization lists Mary Lou Mastro, President, Loh, as its authorized official.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, revalidation and the clinicians who bill Medicare through this organization, from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Linden Oaks Hospital is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Revalidation Due Date
Revalidation due by March 31, 2027
Medicare-enrolled providers and suppliers confirm their enrollment information with CMS on a set cycle, every 5 years for most and every 3 years for medical equipment suppliers. CMS sets the due date for each enrollment.
Clinicians Billing Medicare Through This Organization
61Medicare enrollment records show 61 clinicians reassign Medicare billing to Linden Oaks Hospital, which bills Medicare for the services they deliver. Of these, 41 practice within 10 miles. Listed here are the 20 practicing nearest to this location.
Clinicians by Medicare Specialty 9
Nearest to this location (20)
See all 61Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 Naperville Psychiatric Ventures's NPI number?
The NPI number for Naperville Psychiatric Ventures is 1871628362. It was assigned to this organization in the NPPES registry on February 23, 2007. The provider is doing business as Linden Oaks Hospital.
Where is Naperville Psychiatric Ventures located?
Naperville Psychiatric Ventures is located at 801 S Washington St, Naperville, IL 60540. The listed phone number is (630) 305-5500.
What is Naperville Psychiatric Ventures's specialty?
The primary specialty registered for this NPI is Psychiatric Hospital with taxonomy code 283Q00000X.
Is Naperville Psychiatric Ventures enrolled in Medicare?
Yes. Naperville Psychiatric Ventures is registered in the Medicare PECOS enrollment system.
When is Naperville Psychiatric Ventures's Medicare revalidation due?
According to the CMS Revalidation Due Date List (October 2026 release), the Medicare Non-DME Part B enrollment for this organization (Illinois, Clinic/Group Practice) is due for revalidation by March 31, 2027. Medicare providers and suppliers revalidate their enrollment every 5 years, and medical equipment suppliers every 3 years. Confirm current requirements with your Medicare Administrative Contractor.
How many clinicians bill Medicare through Naperville Psychiatric Ventures?
According to the CMS Revalidation Reassignment List (October 2026 release), 61 clinicians in 9 Medicare specialties reassign their Medicare billing to Naperville Psychiatric Ventures. A 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 the clinician's services. The largest specialties are Cardiovascular Disease (Cardiology) (28), Interventional Cardiology (17) and Cardiac Electrophysiology (6). Of these, 41 practice within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
When was this NPI record last updated?
The NPPES record for Naperville Psychiatric Ventures was last updated on July 11, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Linden Oaks Hospital · NPI 1871628362
Psychiatric Hospital organization in Naperville, Illinois. Organization record, active in the CMS NPPES registry since February 23, 2007.
## Identity
- **NPI:** 1871628362 (Entity type: Organization)
- **Enumerated:** February 23, 2007
- **Primary specialty:** Psychiatric Hospital · taxonomy 283Q00000X
- **Legal business name:** Naperville Psychiatric Ventures
- **Organization subpart:** No
- **Authorized official:** Mary Lou Mastro, PRESIDENT, LOH
## Practice location
- **Address:** 801 S WASHINGTON ST, Naperville, IL 60540-7430
- **Phone:** (630) 305-5500
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Medicare revalidation due:** March 31, 2027 (Non-DME Part B, Illinois, Clinic/Group Practice) · CMS Revalidation Due Date List, October 2026 release
- **Clinicians billing through this organization:** 61 clinicians in 9 Medicare specialties reassign Medicare billing to this organization (form CMS-855R); largest: Cardiovascular Disease (Cardiology) (28), Interventional Cardiology (17), Cardiac Electrophysiology (6); 41 practice within 10 miles; [full list](https://npiprofile.com/npi/1871628362/clinicians) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 11, 2007
- **Other identifiers:** Medicare ID-Type Unspecified 952570 (IL)
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Source: [NPI Profile](https://npiprofile.com/npi/1871628362) · Data from the CMS NPPES public registry.