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

John Mason Erwin, CRNA

Individual provider Certified Registered Nurse Anesthetist · NPI 1386980969

John Mason Erwin, CRNA is a Certified Registered Nurse Anesthetist (CRNA) in Martinsburg, West Virginia. Qualified in 2012, 14 years ago. Practices with Meritus Medical Center Inc, a 746-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Maryland.

Years since qualifying
14
Licensed in
MD
In the registry since
2012
Specialties on file
2
What do these letters mean?
CRNA — Certified Registered Nurse Anesthetist
An advanced practice nurse who administers anaesthesia.

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Practice location Address checks out

1006 Tavern Rd
Martinsburg, WV 25401-2864
Phone: (304) 267-0556
Fax: (304) 267-1460
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 4940 Eastern Ave, Baltimore, MD 21224-2735 — (410) 550-0100

Specialties & licences

Certified Registered Nurse Anesthetist (primary) Taxonomy 367500000X · Licence R181627 (MD)
Registered Nurse Taxonomy 163W00000X · Licence R181627 (MD)

Record details

NPI number1386980969
Entity typeIndividual (Type 1)
GenderMale
Credentials CRNA
Sole proprietorYes
NPI enumeratedDecember 30, 2012
Last updated in NPPESMarch 9, 2023
Certification dateMarch 9, 2023

Medicare enrollment

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

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolOTHER
Graduated 2012 (14 years in practice)
Group practice Meritus Medical Center Inc — 746 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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