MARISSA AILEEN WAGNER MERY M.D.
NPI 1831363217
Anesthesiology - Critical Care Medicine in Houston, TX
About Marissa Aileen Wagner Mery M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARISSA AILEEN WAGNER MERY M.D. (NPI 1831363217) is an individual critical care medicine provider in Houston, Texas, licensed in Texas (R4100) and active in the NPI registry since April 2008. She is enrolled in Medicare PECOS, is affiliated with Vanderbilt University Medical Center, and is a graduate of Harvard Medical School (2008).
NPPES Registry Identity
Specialties & Licenses 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
Marissa Aileen Wagner Mery M.d. 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
5Medicare enrollment records show Marissa Mery reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Houston, TX 77030
- Reassigned Medicare billing, Texas enrollment
- 2,554 clinicians in this Medicare group
Houston, TX 77042
- Reassigned Medicare billing, Texas enrollment
- Medicare enrollment name: U S Anesthesia Partners Of Texas, PA
- 3,804 clinicians in this Medicare group
Del Valle, TX 78617
- Reassigned Medicare billing, Texas enrollment
- 294 clinicians in this Medicare group
Austin, TX 78712
- Reassigned Medicare billing, Texas enrollment
- 1,188 clinicians in this Medicare group
Nashville, TN 37232
- Reassigned Medicare billing, Tennessee enrollment
- 4,711 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Vanderbilt University Medical Center
Acute Care Hospitals · Nashville, TNMedicare 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.
HOUSTON, TX 77030
HOUSTON, TX 77030
HOUSTON, TX 77030
HOUSTON, TX 77030
HOUSTON, TX 77030
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 Mery's NPI number?
The NPI number for Marissa Mery is 1831363217. It was assigned to this individual provider in the NPPES registry on April 16, 2008.
Where is Marissa Mery located?
Marissa Mery practices at 6720 Bertner Ave Ste O-520, Houston, TX 77030. The listed phone number is (832) 355-2666.
What is Marissa Mery's specialty?
The primary specialty registered for this NPI is Anesthesiology, specializing in Critical Care Medicine, with taxonomy code 207LC0200X.
Is Marissa Mery enrolled in Medicare?
Yes. Marissa Mery 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 Marissa Mery's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Marissa Mery reassigns Medicare benefits to 5 organizations: Baylor College Of Medicine (Houston, TX), U. S. Anesthesia Partners Of Texas, P.A., (Houston, TX), The University Of Texas At Austin (Del Valle, TX), Seton Family Of Doctors (Austin, TX) and Vanderbilt University Medical Center (Nashville, TN). 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 Marissa Mery's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Marissa Mery accept?
Health plans from Blue Cross and Blue Shield of Texas, Cigna Healthcare, Oscar Insurance Company and Sendero Health Plans, Local Nonprofit list Marissa Mery 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 Marissa Mery affiliated with any hospitals?
According to CMS data, Marissa Mery is affiliated with Vanderbilt University Medical Center.
When was this NPI record last updated?
The NPPES record for Marissa Mery was last updated on October 26, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Marissa Aileen Wagner Mery, M.D. · NPI 1831363217
Critical Care Medicine physician in Houston, Texas. Individual provider, active in the CMS NPPES registry since April 16, 2008.
## Identity
- **NPI:** 1831363217 (Entity type: Individual)
- **Enumerated:** April 16, 2008
- **Primary specialty:** Anesthesiology - Critical Care Medicine · taxonomy 207LC0200X
- **State license:** R4100 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 6720 BERTNER AVE STE O-520, Houston, TX 77030-2604
- **Phone:** (832) 355-2666
## 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:** 5 organizations under Medicare reassignment (form CMS-855R): Baylor College Of Medicine (NPI 1881026664, Houston, TX); U. S. Anesthesia Partners Of Texas, P.A., (NPI 1548208564, Houston, TX); The University Of Texas At Austin (NPI 1245612225, Del Valle, TX); Seton Family Of Doctors (NPI 1588997233, Austin, TX); Vanderbilt University Medical Center (NPI 1104202761, Nashville, TN) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Harvard Medical School, class of 2008
## Record status
- **NPPES last updated:** October 26, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1831363217) · Data from the CMS NPPES public registry.