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

Dr. Robert Ryan Field, MD

Individual provider Anesthesiology Physician · NPI 1700059615

Dr. Robert Ryan Field, MD practises Anesthesiology in Orange, California. Graduated from University of Kansas School of Med (KC/WICH/SAL) in 2008, 18 years ago. Practices with Regents of the University Of, a 233-clinician group and accepts Medicare assignment. Licensed in California and Missouri.

Years since qualifying
18
Trained at
University of Kansas School of Med (KC/WICH/SAL)
Licensed in
CA, MO
In the registry since
2008
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

333 City Blvd W Ste 2150
Orange, CA 92868-2903 Not confirmed with CMS for 13 years — call before visiting
Phone: (714) 456-5501
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

Anesthesiology Physician (primary) Taxonomy 207L00000X · Licence A121646 (CA)
Anesthesiology Physician Taxonomy 207L00000X · Licence 2008015973 (MO)

Record details

NPI number1700059615
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 11, 2008
Last updated in NPPESOctober 27, 2012

Medicare enrollment

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

Medicare specialtyANESTHESIOLOGY
Medical schoolUNIVERSITY OF KANSAS SCHOOL OF MED (KC/WICH/SAL)
Graduated 2008 (18 years in practice)
Group practice Regents Of The University Of — 233 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 patients159
Services billed 170 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

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.

  • Uci Health-Orange Hospital · Orange, CA

Colleagues at Regents of the University Of

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 233 clinicians in the practice; 12 are shown here.

Other providers in Orange