DR. MARY ANN RILEY D.O.
NPI 1174736441
Internal Medicine in Lavale, MD
About Dr. Mary Ann Riley D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARY ANN RILEY D.O. (NPI 1174736441) is an individual internal medicine provider in Lavale, Maryland, licensed in West Virginia (2205) and active in the NPI registry since May 2007. She is enrolled in Medicare PECOS, is affiliated with Western Maryland Regional Medical Center, and is a graduate of West Virginia School Of Osteopathic Medicine (2005).
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
Dr. Mary Ann Riley D.o. 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 Mary Riley reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Lavale, MD 21502
- Reassigned Medicare billing, Maryland enrollment
- 318 clinicians in this Medicare group
Frostburg, MD 21532
- Reassigned Medicare billing, Maryland enrollment
- 210 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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Western Maryland Regional Medical Center
Acute Care Hospitals · Cumberland, MDPotomac Valley Hospital
Critical Access Hospitals · Keyser, WVPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 21502 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare 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.
Referred Medical Equipment & Supplies CMS DME claims 6
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 5
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 Mary Riley's NPI number?
The NPI number for Mary Riley is 1174736441. It was assigned to this individual provider in the NPPES registry on May 7, 2007.
Where is Mary Riley located?
Mary Riley practices at 1313 National Hwy, Lavale, MD 21502. The listed phone number is (240) 362-0288.
What is Mary Riley's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Mary Riley enrolled in Medicare?
Yes. Mary Riley 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 Mary Riley's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Riley reassigns Medicare benefits to 2 organizations: Upmc Western Maryland Health Services, LLC (Lavale, MD) and Upmc Western Maryland Corporation (Frostburg, MD). 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 Mary Riley's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Mary Riley accept?
Health plans from CareSource list Mary Riley 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 Mary Riley affiliated with any hospitals?
According to CMS data, Mary Riley is affiliated with Western Maryland Regional Medical Center and Potomac Valley Hospital.
When was this NPI record last updated?
The NPPES record for Mary Riley was last updated on January 7, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 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.
# Dr. Mary Ann Riley, D.O. · NPI 1174736441
Internal Medicine physician in Lavale, Maryland. Individual provider, active in the CMS NPPES registry since May 7, 2007.
## Identity
- **NPI:** 1174736441 (Entity type: Individual)
- **Enumerated:** May 7, 2007
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 2205 (West Virginia)
- **Sole proprietor:** No
## Practice location
- **Address:** 1313 NATIONAL HWY, Lavale, MD 21502-7618
- **Phone:** (240) 362-0288 · **Fax:** (240) 362-0052
## 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): Upmc Western Maryland Health Services, LLC (NPI 1811756232, Lavale, MD); Upmc Western Maryland Corporation (NPI 1952495079, Frostburg, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** West Virginia School Of Osteopathic Medicine, class of 2005
## Record status
- **NPPES last updated:** January 7, 2015
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Source: [NPI Profile](https://npiprofile.com/npi/1174736441) · Data from the CMS NPPES public registry.