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Recently Updated NPI Information — some details in this NPI profile have been updated in the NPI registry within the last 60 days.

DEREK JOSEPH FIEDLER
NPI 1205391620
Nurse Anesthetist, Certified Registered in Orange, CA

Active since February 11, 2019
97.71/100
CMS Quality Rating
101 THE CITY DR S, ORANGE, CA 92868(714) 456-8888 Get Directions Write a Review

NPPES record last updated: September 29, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Sep 29, 2026, Jul 31, 2024, Jun 21, 2023 and 2 more (5 updates tracked since 2019).

About Derek Joseph Fiedler NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DEREK JOSEPH FIEDLER (NPI 1205391620) is an individual nurse anesthetist, certified registered in Orange, California, licensed in California (95001930) and active in the NPI registry since February 2019. He maintains 3 additional practice locations and is a graduate of Other (2018).

NPPES Registry Identity

NPI1205391620
Entity TypeIndividualMale
Primary Taxonomy367500000X
Provider Legal NameDEREK JOSEPH FIEDLER
Location Address101 THE CITY DR SOrange, CA 92868-3201
Mailing Address200 S Manchester Ave Ste 300Orange, CA 92868-3219 · (714) 456-8888
Phone(714) 456-8888
Sole ProprietorYes
Medical School CMSOtherGraduated 2018
Enumeration DateFebruary 11, 2019
Last NPPES UpdateSeptember 29, 20265 updates tracked since enumeration
NPPES CertifiedJuly 31, 2024
✔ NPI 1205391620 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyNurse Anesthetist, Certified RegisteredPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367500000X
License✔ Licensed in CA · 95001930
Definition
(1) A licensed registered nurse with advanced specialty education in anesthesia who, in collaboration with appropriate health care professionals, provides preoperative, intraoperative, and postoperative care to patients and assists in management and resuscitation of critical patients in intensive care, coronary care, and emergency situations. Nurse anesthetists are certified following successful completion of credentials and state licensure review and a national examination directed by the Council on Certification of Nurse Anesthetists. (2) A registered nurse who is qualified by special training to administer anesthesia in collaboration with a physician or dentist and who can assist in the care of patients who are in critical condition.
Also ListedAnesthesiologyTaxonomy 207L00000X · License 209018750 (IL)
101 THE CITY DR S, Orange, CA 92868
Open in Google Maps ↗

Secondary Practice Locations 3

Location 1University of Chicago, 5841 S Maryland AveChicago, IL 60637 · Phone (773) 702-1234
Location 2200 W Arbor DrSan Diego, CA 92103-9000 · Phone (800) 926-8273
Location 3700 W El Norte PkwyEscondido, CA 92026-3923 · Phone (760) 738-7830

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Derek Joseph Fiedler 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.

PECOS PAC ID5890170195
PECOS Enrollment IDI20230206001579

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

97.71/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored through an Alternative Payment Model
Quality75.43
Promoting Interoperability100
Improvement Activities40

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.

DR. ANKIT BHUPENDRA PATEL D.O.
Radiology (Diagnostic Radiology)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-5113
DR. LAURA CATHERINE SKOCZYLAS MD
Obstetrics & Gynecology
101 THE CITY DR S, BUILDING 56, DEPARTMENT OF OB/GYN
ORANGE, CA 92868
Orange County (714) 456-8224
MICHAEL CHENG DO
Internal Medicine (Rheumatology)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-7110
AESTHETIC AND PLASTIC SURGERY INSTITUTE
Plastic Surgery
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-2986
JOSEPH VILLARREAL M.D.
Emergency Medicine
101 THE CITY DR S, BUILDING 1A, ROOM 1009
ORANGE, CA 92868
Orange County (714) 456-5239
DEMI TRAN
Psychiatry & Neurology (Neurology)
101 THE CITY DR S, CITY TOWER, SUITE 400
ORANGE, CA 92868
Orange County (171) 456-6693
DR. ISABEL CARLTON CLARK M.D.
Surgery (Trauma Surgery)
101 THE CITY DR S
ORANGE, CA 92868
Orange County (714) 456-7890
DYLAN LUKATO
Emergency Medicine
101 THE CITY DR S
ORANGE, CA 92868
Orange County (415) 218-8041

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 Derek Fiedler's NPI number?

The NPI number for Derek Fiedler is 1205391620. It was assigned to this individual provider in the NPPES registry on February 11, 2019.

Where is Derek Fiedler located?

Derek Fiedler practices at 101 The City Dr S, Orange, CA 92868. The listed phone number is (714) 456-8888.

What is Derek Fiedler's specialty?

The primary specialty registered for this NPI is Nurse Anesthetist, Certified Registered with taxonomy code 367500000X.

Is Derek Fiedler enrolled in Medicare?

Yes. Derek Fiedler 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.

When was this NPI record last updated?

The NPPES record for Derek Fiedler was last updated on September 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 days 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.