DR. MARISSA CHRISTINE STOCK MD
NPI 1073531505
Pediatrics in Washington, MO
About Dr. Marissa Christine Stock Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARISSA CHRISTINE STOCK MD (NPI 1073531505) is an individual pediatrics provider in Washington, Missouri, licensed in Missouri (2004007508) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses 3
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 (PECOS)
Dr. Marissa Christine Stock Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Marissa Stock reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Wildwood, MO 63040
- 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63090 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WASHINGTON, MO 63090
WASHINGTON, MO 63090
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 Marissa Stock's NPI number?
The NPI number for Marissa Stock is 1073531505. It was assigned to this individual provider in the NPPES registry on July 17, 2006.
Where is Marissa Stock located?
Marissa Stock practices at 901 Patients First Dr, Washington, MO 63090. The listed phone number is (636) 231-3690.
What is Marissa Stock's specialty?
The primary specialty registered for this NPI is Pediatrics with taxonomy code 208000000X.
Is Marissa Stock enrolled in Medicare?
Yes. Marissa Stock is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Marissa Stock's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Stock reassigns Medicare benefits to Mercy Clinic East Communities (Wildwood, 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 Marissa Stock's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marissa Stock accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Sunflower Health Plan and Ambetter of Oklahoma and 3 other insurers list Marissa Stock 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 Marissa Stock was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 24 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.
# Dr. Marissa Christine Stock, MD · NPI 1073531505
Pediatrics physician in Washington, Missouri. Individual provider, active in the CMS NPPES registry since July 17, 2006.
## Identity
- **NPI:** 1073531505 (Entity type: Individual)
- **Enumerated:** July 17, 2006
- **Primary specialty:** Pediatrics · taxonomy 208000000X
- **State license:** 2004007508 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 901 PATIENTS FIRST DR, Washington, MO 63090-4700
- **Phone:** (636) 231-3690 · **Fax:** (636) 231-3693
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Mercy Clinic East Communities (NPI 1164857397, Wildwood, MO), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** September 29, 2026
- **Other identifiers:** Medicaid 206232407 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1073531505) · Data from the CMS NPPES public registry.