MONIQUE MARIE WILLIAMS MD
NPI 1780602417
Internal Medicine - Geriatric Medicine in Hazelwood, MO
About Monique Marie Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MONIQUE MARIE WILLIAMS MD (NPI 1780602417) is an individual geriatric medicine provider in Hazelwood, Missouri, licensed in Missouri (2002045377) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, is affiliated with Mercy Hospital St Louis, and is a graduate of Washington University School Of Medicine (1999).
NPPES Registry Identity
Specialties & Licenses
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
Monique Marie Williams 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 Reassignment
Medicare enrollment records show Monique Williams reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Saint Louis, MO 63141
- 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 2
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, MOChristian Hospital Northeast
Acute Care Hospitals · Saint Louis, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63042 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 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 Monique Williams's NPI number?
The NPI number for Monique Williams is 1780602417. It was assigned to this individual provider in the NPPES registry on July 18, 2006.
Where is Monique Williams located?
Monique Williams practices at 637 Dunn Rd Ste 102, Hazelwood, MO 63042. The listed phone number is (314) 817-2000.
What is Monique Williams's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Geriatric Medicine, with taxonomy code 207RG0300X.
Is Monique Williams enrolled in Medicare?
Yes. Monique Williams 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 Monique Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Monique Williams 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 Monique Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Monique Williams accept?
Health plans from Anthem Blue Cross and Blue Shield and UnitedHealthcare list Monique Williams 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 Monique Williams affiliated with any hospitals?
According to CMS data, Monique Williams is affiliated with Mercy Hospital St Louis and Christian Hospital Northeast.
When was this NPI record last updated?
The NPPES record for Monique Williams was last updated on April 9, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 months 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.
# Monique Marie Williams, MD · NPI 1780602417
Geriatric Medicine physician in Hazelwood, Missouri. Individual provider, active in the CMS NPPES registry since July 18, 2006.
## Identity
- **NPI:** 1780602417 (Entity type: Individual)
- **Enumerated:** July 18, 2006
- **Primary specialty:** Internal Medicine - Geriatric Medicine · taxonomy 207RG0300X
- **State license:** 2002045377 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 637 DUNN RD STE 102, Hazelwood, MO 63042-1747
- **Phone:** (314) 817-2000
## 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 1043574940, Saint Louis, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Washington University School Of Medicine, class of 1999
## Record status
- **NPPES last updated:** April 9, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1780602417) · Data from the CMS NPPES public registry.