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DARLENE MICHELLE FIELDS CRNA
NPI 1730146903
Nurse Anesthetist, Certified Registered in Oakland, CA

Active since April 28, 2006
PO BOX 18923, OAKLAND, CA 94619(510) 269-1792 Get Directions Write a Review

NPPES record last updated: February 25, 2025. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Feb 25, 2025, Oct 1, 2020, Dec 15, 2016 (3 updates tracked since 2016).

About Darlene Michelle Fields Crna NPPES

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

DARLENE MICHELLE FIELDS CRNA (NPI 1730146903) is an individual nurse anesthetist, certified registered in Oakland, California, licensed in California (RN500192) and active in the NPI registry since April 2006.

NPPES Registry Identity

NPI1730146903
Entity TypeIndividualFemale
Primary Taxonomy367500000X
Provider Legal NameDARLENE MICHELLE FIELDSCredential: CRNA
Location AddressPO BOX 18923Oakland, CA 94619-0923
Mailing AddressPo Box 18923Oakland, CA 94619-0923 · (510) 339-3912
Phone(510) 269-1792
Sole ProprietorNo
Enumeration DateApril 28, 2006
Last NPPES UpdateFebruary 25, 20253 updates tracked since enumeration
NPPES CertifiedFebruary 25, 2025
✔ NPI 1730146903 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Anesthetist, Certified RegisteredPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code367500000X
License✔ Licensed in CA · RN500192
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.
PO BOX 18923, Oakland, CA 94619
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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Darlene Michelle Fields Crna is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignments

5

Medicare enrollment records show Darlene Fields reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Permanente Medical Group Inc
12 mi
Internal Medicine
2238 GEARY
San Francisco, CA 94116
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1841373800 (415) 833-2200
University Anesthesia Medical Group
13 mi
Anesthesiology
505 PARNASSUS AVE
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 723 clinicians in this Medicare group
NPI 1528137296 (415) 476-1000
University Of California San Francisco
13 mi
Surgery
400 PARNASSUS AVE, MCB 300
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 5,645 clinicians in this Medicare group
NPI 1346329380 (415) 353-2161
Ucsf Medical Group Business Services
13 mi
Internal Medicine
400 PARNASSUS AVE
San Francisco, CA 94122
  • Reassigned Medicare billing, California enrollment
  • 5,544 clinicians in this Medicare group
NPI 1477624104 (415) 353-2808
St. Joseph Health Northern California, LLC
37 mi
General Acute Care Hospital
1000 TRANCAS ST
Napa, CA 94558
  • Reassigned Medicare billing, California enrollment
  • 32 clinicians in this Medicare group
NPI 1235218785 (707) 252-4411

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731
This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.
21 services21 patients
Anesthesia for other procedure on large bowel using an endoscope 00811
Anesthesia for an endoscopic procedure on the large bowel ensures comfort and relaxation during the procedure. You'll be given medication to make you drowsy or asleep, eliminating any discomfort. The medication can be administered through a vein or inhaled.
13 services13 patients

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 Darlene Fields's NPI number?

The NPI number for Darlene Fields is 1730146903. It was assigned to this individual provider in the NPPES registry on April 28, 2006.

Where is Darlene Fields located?

Darlene Fields practices at PO Box 18923, Oakland, CA 94619. The listed phone number is (510) 269-1792.

What is Darlene Fields's specialty?

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

Is Darlene Fields enrolled in Medicare?

Yes. Darlene Fields is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Darlene Fields's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Darlene Fields reassigns Medicare benefits to 5 organizations: Permanente Medical Group Inc (San Francisco, CA), University Anesthesia Medical Group (San Francisco, CA), University Of California San Francisco (San Francisco, CA), Ucsf Medical Group Business Services (San Francisco, CA) and St. Joseph Health Northern California, LLC (Napa, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Darlene Fields's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Darlene Fields was last updated on February 25, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 months 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.