DR. JENNIFER LEE DEMERTZIS MD
NPI 1245326966
Radiology - Diagnostic Radiology in Chesterfield, MO
About Dr. Jennifer Lee Demertzis Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JENNIFER LEE DEMERTZIS MD (NPI 1245326966) is an individual diagnostic radiology provider in Chesterfield, Missouri, licensed in Missouri (2008007442) and active in the NPI registry since October 2006. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and is a graduate of Emory University School Of Medicine (2003).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 3
Accepted Insurance
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. Jennifer Lee Demertzis Md 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.
Medicare Billing Reassignments
4Medicare enrollment records show Jennifer Demertzis reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Chesterfield, MO 63017
- Reassigned Medicare billing, Missouri enrollment
- 32 clinicians in this Medicare group
Chesterfield, MO 63017
- Reassigned Medicare billing, Missouri enrollment
- 215 clinicians in this Medicare group
Creve Coeur, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- Medicare enrollment name: St. Luke's Immediate Care, LLC
- 48 clinicians in this Medicare group
Saint Louis, MO 63122
- Reassigned Medicare billing, Missouri enrollment
- 34 clinicians in this Medicare group
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 35
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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital St Louis
Acute Care Hospitals · Saint Louis, MOSt Lukes Hospital
Acute Care Hospitals · Chesterfield, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63017 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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.
CHESTERFIELD, MO 63017
CHESTERFIELD, MO 63017
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 Jennifer Demertzis's NPI number?
The NPI number for Jennifer Demertzis is 1245326966. It was assigned to this individual provider in the NPPES registry on October 4, 2006.
Where is Jennifer Demertzis located?
Jennifer Demertzis practices at 232 S Woods Mill Rd, Chesterfield, MO 63017. The listed phone number is (314) 434-1500.
What is Jennifer Demertzis's specialty?
The primary specialty registered for this NPI is Radiology, specializing in Diagnostic Radiology, with taxonomy code 2085R0202X.
Is Jennifer Demertzis enrolled in Medicare?
Yes. Jennifer Demertzis 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 Jennifer Demertzis's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jennifer Demertzis reassigns Medicare benefits to 4 organizations: Diagnostic Imaging Associates Ltd (Chesterfield, MO), Physician Specialists Of St Lukes LLC (Chesterfield, MO), St Lukes Immediate Care LLC (Creve Coeur, MO) and Premier Medical Physicians LLC (Saint Louis, MO). 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 Jennifer Demertzis's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Jennifer Demertzis accept?
Health plans from Anthem Blue Cross and Blue Shield and Oscar Insurance Company list Jennifer Demertzis 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.
Is Jennifer Demertzis affiliated with any hospitals?
According to CMS data, Jennifer Demertzis is affiliated with Mercy Hospital St Louis and St Lukes Hospital.
When was this NPI record last updated?
The NPPES record for Jennifer Demertzis was last updated on October 18, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.