Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.

Mrs. Monica Jean Trefz, DNP, CRNA

Individual provider Certified Registered Nurse Anesthetist · NPI 1942043088

Mrs. Monica Jean Trefz, DNP, CRNA is registered under Certified Registered Nurse Anesthetist (CRNA) in Newark, Delaware. Qualified in 2024, 2 years ago. Practices with Anesthesia Services PA, a 201-clinician group and accepts Medicare assignment. Licensed in Delaware.

Years since qualifying
2
Licensed in
DE
In the registry since
2024
What do these letters mean?
DNP — Doctor of Nursing Practice
The highest clinical degree in nursing.
CRNA — Certified Registered Nurse Anesthetist
An advanced practice nurse who administers anaesthesia.

See every abbreviation used in this directory →

Practice location Address checks out

4755 Ogletown Stanton Rd
Newark, DE 19718-2200
Phone: (302) 733-1000
Show map & directions

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

Specialties & licences

Certified Registered Nurse Anesthetist (primary) Taxonomy 367500000X · Licence L6-0A10988 (DE)

Record details

NPI number1942043088
Entity typeIndividual (Type 1)
GenderFemale
Credentials DNP , CRNA
Sole proprietorNo
NPI enumeratedJune 17, 2024
Last updated in NPPESJune 17, 2024
Certification dateJune 10, 2024

Medicare enrollment

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

Medicare specialtyCERTIFIED REGISTERED NURSE ANESTHETIST (CRNA)
Medical schoolOTHER
Graduated 2024 (2 years in practice)
Group practice Anesthesia Services Pa — 201 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 patients91
Services billed 93 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at Anesthesia Services PA

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 201 clinicians in the practice; 12 are shown here.

Other providers in Newark