MARYANN THERESE MCYAT ALLY MD
NPI 1316104359
Hospitalist in Falls Church, VA
About Maryann Therese Mcyat Ally Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARYANN THERESE MCYAT ALLY MD (NPI 1316104359) is an individual hospitalist provider in Falls Church, Virginia, licensed in California (C146011) and active in the NPI registry since May 2008. She is enrolled in Medicare PECOS and is a graduate of George Washington University School Of Medicine (2006).
NPPES Registry Identity
Specialties & Licenses 2
Other Names 1
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
Maryann Therese Mcyat Ally 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
2Medicare enrollment records show Maryann Ally reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Diego, CA 92103
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Regents Of The University Of California
- 1,051 clinicians in this Medicare group
Honolulu, HI 96813
- Reassigned Medicare billing, Hawaii enrollment
- 664 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 5
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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 22042 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Referred Medical Equipment & Supplies CMS DME claims 4
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
FALLS CHURCH, VA 22042
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 Maryann Ally's NPI number?
The NPI number for Maryann Ally is 1316104359. It was assigned to this individual provider in the NPPES registry on May 19, 2008. The provider is also known as Mary Ann Therese Mcyat MD.
Where is Maryann Ally located?
Maryann Ally practices at 3300 Gallows Rd, Falls Church, VA 22042. The listed phone number is (703) 776-3582.
What is Maryann Ally's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Maryann Ally enrolled in Medicare?
Yes. Maryann Ally 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 Maryann Ally's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Maryann Ally reassigns Medicare benefits to 2 organizations: Regents Of The University Of California - Ucsd Medical Group (San Diego, CA) and Straub Clinic & Hospital (Honolulu, HI). 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 Maryann Ally's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Maryann Ally was last updated on June 29, 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.
# Maryann Therese Mcyat Ally, MD · NPI 1316104359
Hospitalist physician in Falls Church, Virginia. Individual provider, active in the CMS NPPES registry since May 19, 2008.
## Identity
- **NPI:** 1316104359 (Entity type: Individual)
- **Enumerated:** May 19, 2008
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** C146011 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 3300 GALLOWS RD, Falls Church, VA 22042-3307
- **Phone:** (703) 776-3582
## 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:** 2 organizations under Medicare reassignment (form CMS-855R): Regents Of The University Of California - Ucsd Medical Group (NPI 1336267137, San Diego, CA); Straub Clinic & Hospital (NPI 1457306508, Honolulu, HI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** George Washington University School Of Medicine, class of 2006
## Record status
- **NPPES last updated:** June 29, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1316104359) · Data from the CMS NPPES public registry.