WILLIAM KEEGAN ARMSTRONG CRNA
NPI 1356461388
Nurse Anesthetist, Certified Registered in Morgantown, WV
About William Keegan Armstrong Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM KEEGAN ARMSTRONG CRNA (NPI 1356461388) is an individual nurse anesthetist, certified registered in Morgantown, West Virginia, licensed in Florida (APRN11000993) and active in the NPI registry since March 2007. He is affiliated with Flagler Hospital, maintains a secondary practice location in Yukon, and is a graduate of Other (2007).
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 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 and accepts Medicare assignment
William Keegan Armstrong Crna 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
7Medicare enrollment records show William Armstrong reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Morgantown, WV 26506
- Reassigned Medicare billing, West Virginia enrollment
- 2,471 clinicians in this Medicare group
Leesburg, VA 20176
- Reassigned Medicare billing, Virginia enrollment
- 1,217 clinicians in this Medicare group
Melville, NY 11747
- Reassigned Medicare billing, Florida enrollment
- 628 clinicians in this Medicare group
Maitland, FL 32751
- Reassigned Medicare billing, Florida enrollment
- 2,356 clinicians in this Medicare group
Edmond, OK 73034
- Reassigned Medicare billing, Oklahoma enrollment
- 182 clinicians in this Medicare group
Fort Worth, TX 76109
- Reassigned Medicare billing, Texas enrollment
- 1,612 clinicians in this Medicare group
Tucson, AZ 85747
- Reassigned Medicare billing, Arizona enrollment
- 204 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 7
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.
Flagler Hospital
Acute Care Hospitals · Saint Augustine, FLRiverside Regional Medical Center
Acute Care Hospitals · Newport News, VAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 26506 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.
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.
MORGANTOWN, WV 26506
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 William Armstrong's NPI number?
The NPI number for William Armstrong is 1356461388. It was assigned to this individual provider in the NPPES registry on March 31, 2007.
Where is William Armstrong located?
William Armstrong practices at 1 Medical Center Dr, Morgantown, WV 26506. The listed phone number is (304) 598-4000.
What is William Armstrong's specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is William Armstrong enrolled in Medicare?
Yes. William Armstrong 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 William Armstrong's services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Armstrong reassigns Medicare benefits to 7 organizations: West Virginia University Medical Corporation (Morgantown, WV), American Anesthesiology Of Virginia, PC (Leesburg, VA), American Anesthesiology Services Of Florida, Inc. (Melville, NY), Us Anesthesia Partners Of Florida Inc. (Maitland, FL), Anesthesia Medical Professionals, PLLC (Edmond, OK) and 2 more organizations, listed in the Medicare section above. 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 William Armstrong's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does William Armstrong accept?
Health plans from Blue Cross and Blue Shield of Texas, Cigna HealthCare of Florida, Inc., Cigna Healthcare, Molina Healthcare and Oscar Health and 2 other insurers list William Armstrong 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 William Armstrong affiliated with any hospitals?
According to CMS data, William Armstrong is affiliated with Flagler Hospital and Riverside Regional Medical Center.
When was this NPI record last updated?
The NPPES record for William Armstrong was last updated on July 30, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.
# William Keegan Armstrong, CRNA · NPI 1356461388
Nurse Anesthetist, Certified Registered physician in Morgantown, West Virginia. Individual provider, active in the CMS NPPES registry since March 31, 2007.
## Identity
- **NPI:** 1356461388 (Entity type: Individual)
- **Enumerated:** March 31, 2007
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** APRN11000993 (Florida)
- **Sole proprietor:** No
## Practice location
- **Address:** 1 MEDICAL CENTER DR, Morgantown, WV 26506-1200
- **Phone:** (304) 598-4000
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 7 organizations under Medicare reassignment (form CMS-855R): West Virginia University Medical Corporation (NPI 1275504508, Morgantown, WV); American Anesthesiology Of Virginia, PC (NPI 1053675199, Leesburg, VA); American Anesthesiology Services Of Florida, Inc. (NPI 1508318387, Melville, NY); Us Anesthesia Partners Of Florida Inc. (NPI 1518910520, Maitland, FL); Anesthesia Medical Professionals, PLLC (NPI 1962785931, Edmond, OK); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2007
## Record status
- **NPPES last updated:** July 30, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1356461388) · Data from the CMS NPPES public registry.