WILLIAM LASH, CRNA
NPI 1194751115
Nurse Anesthetist, Certified Registered in Falls Church, VA
About William Lash, Crna NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
WILLIAM LASH, CRNA (NPI 1194751115) is an individual nurse anesthetist, certified registered in Falls Church, Virginia, licensed in Maryland (RN1004175) and active in the NPI registry since June 2006. He is a graduate of University Of Pittsburgh School Of Medicine (1989).
NPPES Registry Identity
Specialties & Licenses
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 Lash, 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
3Medicare enrollment records show William Lash, reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Falls Church, VA 22042
- Reassigned Medicare billing, District of Columbia and Virginia enrollments
- 455 clinicians in this Medicare group
Fairfox, VA 22030
- Reassigned Medicare billing, District of Columbia enrollment
- 26 clinicians in this Medicare group
Prince Frederick, MD 20678
- Reassigned Medicare billing, District of Columbia enrollment
- 196 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 3
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.
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 William Lash,'s NPI number?
The NPI number for William Lash, is 1194751115. It was assigned to this individual provider in the NPPES registry on June 23, 2006.
Where is William Lash, located?
William Lash, practices at 3300 Gallows Rd, Falls Church, VA 22042. The listed phone number is (703) 689-3138.
What is William Lash,'s specialty?
The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.
Is William Lash, enrolled in Medicare?
Yes. William Lash, 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 Lash,'s services?
According to the CMS Revalidation Reassignment List (October 2026 release), William Lash, reassigns Medicare benefits to 3 organizations: American Anesthesiology Of Virginia PC (Falls Church, VA), Ambulatory Anesthesia Services Inc (Fairfox, VA) and North American Partners In Anesthesia Maryland LLC (Prince Frederick, 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 William Lash,'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 William Lash, was last updated on April 24, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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.
# William Lash,, CRNA · NPI 1194751115
Nurse Anesthetist, Certified Registered physician in Falls Church, Virginia. Individual provider, active in the CMS NPPES registry since June 23, 2006.
## Identity
- **NPI:** 1194751115 (Entity type: Individual)
- **Enumerated:** June 23, 2006
- **Primary specialty:** Nurse Anesthetist, Certified Registered · taxonomy 367500000X
- **State license:** RN1004175 (Maryland)
- **Sole proprietor:** No
## Practice location
- **Address:** 3300 GALLOWS RD, Falls Church, VA 22042-3307
- **Phone:** (703) 689-3138
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): American Anesthesiology Of Virginia PC (NPI 1417994872, Falls Church, VA); Ambulatory Anesthesia Services Inc (NPI 1548363740, Fairfox, VA); North American Partners In Anesthesia Maryland LLC (NPI 1093707879, Prince Frederick, MD) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Pittsburgh School Of Medicine, class of 1989
## Record status
- **NPPES last updated:** April 24, 2019
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Source: [NPI Profile](https://npiprofile.com/npi/1194751115) · Data from the CMS NPPES public registry.