DIANE DENISE BLOCK NP
NPI 1699158196
Nurse Practitioner in Fenton, MO
About Diane Denise Block Np NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DIANE DENISE BLOCK NP (NPI 1699158196) is an individual nurse practitioner in Fenton, Missouri, licensed in Missouri (2015013958) and active in the NPI registry since July 2015. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital Jefferson, and maintains a secondary practice location in Fenton.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Secondary Practice Location 1
Other Identifiers 1
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
Diane Denise Block Np 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 Reassignment
Medicare enrollment records show Diane Block reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saint Louis, MO 63128
- Reassigned Medicare billing, Missouri enrollment
- 744 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 6
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Mercy Hospital Jefferson
Acute Care Hospitals · Festus, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63026 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 12
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
FENTON, MO 63026
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 Diane Block's NPI number?
The NPI number for Diane Block is 1699158196. It was assigned to this individual provider in the NPPES registry on July 1, 2015. The provider is also known as Diane Denise Sitarski.
Where is Diane Block located?
Diane Block practices at 1345 Smizer Mill Rd Ste 1100, Fenton, MO 63026. The listed phone number is (636) 496-5023.
What is Diane Block's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is Diane Block enrolled in Medicare?
Yes. Diane Block 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 Diane Block's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Diane Block reassigns Medicare benefits to Mercy Clinic East Communities (Saint Louis, MO). 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 Diane Block's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Diane Block accept?
Health plans from Anthem Blue Cross and Blue Shield and UnitedHealthcare list Diane Block 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 Diane Block affiliated with any hospitals?
According to CMS data, Diane Block is affiliated with Mercy Hospital Jefferson.
When was this NPI record last updated?
The NPPES record for Diane Block was last updated on November 19, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 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.
# Diane Denise Block, NP · NPI 1699158196
Nurse Practitioner physician in Fenton, Missouri. Individual provider, active in the CMS NPPES registry since July 1, 2015.
## Identity
- **NPI:** 1699158196 (Entity type: Individual)
- **Enumerated:** July 1, 2015
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** 2015013958 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 1345 SMIZER MILL RD STE 1100, Fenton, MO 63026-7305
- **Phone:** (636) 496-5023
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Mercy Clinic East Communities (NPI 1720635329, Saint Louis, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2013
## Record status
- **NPPES last updated:** November 19, 2020
- **Other identifiers:** Other 2015013958 (MO)
---
Source: [NPI Profile](https://npiprofile.com/npi/1699158196) · Data from the CMS NPPES public registry.