1. Home
  2. Directory
  3. California
  4. Los Angeles
  5. Nurse Anesthetist Certified Registered
  6. NPI Profile

MASON COX CRNA
NPI 1659066181
Nurse Anesthetist, Certified Registered in Los Angeles, CA

Active since April 10, 2023
4867 W SUNSET BLVD, LOS ANGELES, CA 90027(323) 783-4011 Get Directions Write a Review

NPPES record last updated: April 10, 2023. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Mason Cox Crna NPPES

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

MASON COX CRNA (NPI 1659066181) is an individual nurse anesthetist, certified registered in Los Angeles, California, licensed in California (95001925) and active in the NPI registry since April 2023.

NPPES Registry Identity

NPI1659066181
Entity TypeIndividualMale
Primary Taxonomy367500000X
Provider Legal NameMASON COXCredential: CRNA
Location Address4867 W SUNSET BLVDLos Angeles, CA 90027-5969
Mailing Address1689 Amberwood Dr Apt 108South Pasadena, CA 91030-1917
Phone(323) 783-4011
Sole ProprietorYes
Enumeration DateApril 10, 2023
NPPES CertifiedApril 10, 2023
✔ NPI 1659066181 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 · 95001925
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.
4867 W SUNSET BLVD, Los Angeles, CA 90027
Open in Google Maps ↗

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Mason Cox Crna is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Medicare Billing Reassignments

6

Medicare enrollment records show Mason Cox reassigns Medicare billing to 6 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Tip Top Anesthesia Group Inc
5.1 mi
Licensed Practical Nurse
50 N LA CIENEGA BLVD, SUITE 203
Beverly Hills, CA 90211
  • Reassigned Medicare billing, California enrollment
  • 88 clinicians in this Medicare group
NPI 1508283698 (323) 988-0896
Digestive Health Associates Of Southern California
12 mi
Anatomic Pathology & Clinical Pathology
1301 20TH ST STE 280
Santa Monica, CA 90404
  • Reassigned Medicare billing, California enrollment
  • 57 clinicians in this Medicare group
NPI 1043098619 (310) 829-6789
Scq Anesthesia A Professional Nursing Corporation
15 mi
Nurse Anesthetist, Certified Registered
18840 VENTURA BLVD # 100A
Tarzana, CA 91356
  • Reassigned Medicare billing, California enrollment
  • 44 clinicians in this Medicare group
NPI 1689381105 (818) 345-6126
Amsurg Arcadia Anesthesia LP
16 mi
Anesthesiology
488 EAST SANTA CLARA STREET, SUITE 102
Arcadia, CA 91006
  • Reassigned Medicare billing, California enrollment
  • 72 clinicians in this Medicare group
NPI 1114291226 (626) 359-9555
Glendora Anesthesia Associates LP
24 mi
Nurse Anesthetist, Certified Registered
1794 S BARRANCA AVE
Glendora, CA 91740
  • Reassigned Medicare billing, California enrollment
  • 43 clinicians in this Medicare group
NPI 1750748331 (626) 858-4600
Apa Medical Group, Inc.
42 mi
Anesthesiology
4005 MISSION OAKS BLVD UNIT A
Camarillo, CA 93012
  • Reassigned Medicare billing, California enrollment
  • 112 clinicians in this Medicare group
NPI 1700596111 (310) 879-5203

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 3

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 procedure on small and large bowel using an endoscope 00813
Anesthesia for an endoscopic procedure on the small and large bowel ensures comfort and relaxation during the procedure. It involves administering medicine to help you sleep or feel drowsy. This allows the doctor to examine your bowels without causing you discomfort or pain.
23 services23 patients
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.
11 services11 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.
11 services11 patients

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.

CHRISELDA MANALO
Nurse Practitioner (Gerontology)
4867 W SUNSET BLVD, 6TH FLOOR - INTENSIVE CARE UNIT
LOS ANGELES, CA 90027
Los Angeles County (323) 783-9644
HEDDY TRAC
Respiratory Therapist, Certified
4867 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (323) 783-8320
DAVID HWANG DO
Internal Medicine (Nephrology)
4867 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (833) 574-2273
SOPHIA ROCHELLE WILSON DNP, CRNA
Nurse Anesthetist, Certified Registered
4867 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (276) 734-1219
MRS. ALEXANDRA FELDMAN
Pharmacist
4867 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (323) 783-8308
ALLISON BRIEL GROSSMAN SLP
Speech-Language Pathologist
4867 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (833) 574-2273
MISS SERENA LI
Pharmacist
4867 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (323) 783-1546
MICHAEL INDUCIL RCP
Respiratory Therapist, Registered
4867 W SUNSET BLVD
LOS ANGELES, CA 90027
Los Angeles County (323) 783-8320

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 Mason Cox's NPI number?

The NPI number for Mason Cox is 1659066181. It was assigned to this individual provider in the NPPES registry on April 10, 2023.

Where is Mason Cox located?

Mason Cox practices at 4867 W Sunset Blvd, Los Angeles, CA 90027. The listed phone number is (323) 783-4011.

What is Mason Cox's specialty?

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

Is Mason Cox enrolled in Medicare?

Yes. Mason Cox is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Mason Cox's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Mason Cox reassigns Medicare benefits to 6 organizations: Tip Top Anesthesia Group Inc (Beverly Hills, CA), Digestive Health Associates Of Southern California (Santa Monica, CA), Scq Anesthesia A Professional Nursing Corporation (Tarzana, CA), Amsurg Arcadia Anesthesia LP (Arcadia, CA), Glendora Anesthesia Associates LP (Glendora, CA) and 1 more organization, listed in the Medicare section above. 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 Mason Cox'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 Mason Cox was last updated on April 10, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.