Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

William Lash, CRNA

Individual provider Certified Registered Nurse Anesthetist · NPI 1194751115

William Lash, CRNA is registered under Certified Registered Nurse Anesthetist (CRNA) in Falls Church, Virginia. Graduated from University of Pittsburgh School of Medicine in 1989, 37 years ago. Practices with Ambulatory Anesthesia Services Inc, an 18-clinician group and accepts Medicare assignment. Licensed in Maryland and Virginia.

Years since qualifying
37
Trained at
University of Pittsburgh School of Medicine
Licensed in
MD, VA
In the registry since
2006
Specialties on file
2
What do these letters mean?
CRNA — Certified Registered Nurse Anesthetist
An advanced practice nurse who administers anaesthesia.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

3300 Gallows Rd
Falls Church, VA 22042-3307
Phone: (703) 689-3138
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Certified Registered Nurse Anesthetist (primary) Taxonomy 367500000X · Licence RN1004175 (MD)
Certified Registered Nurse Anesthetist Taxonomy 367500000X · Licence 0024152408 (VA)

Record details

NPI number1194751115
Entity typeIndividual (Type 1)
GenderMale
Credentials CRNA
Sole proprietorNo
NPI enumeratedJune 23, 2006
Last updated in NPPESApril 24, 2019

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolUNIVERSITY OF PITTSBURGH SCHOOL OF MEDICINE
Graduated 1989 (37 years in practice)
Group practice Ambulatory Anesthesia Services Inc — 18 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients490
Services billed 559 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Colleagues at Ambulatory Anesthesia Services Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 18 clinicians in the practice; 12 are shown here.

Other providers in Falls Church