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NATHANIEL L FOX MD
NPI 1982193421
Emergency Medicine in Tucson, AZ

Active since May 09, 2018PECOS EnrolledAccepts Medicare Assignment
1501 N CAMPBELL AVE, TUCSON, AZ 85724(520) 626-7233 Get Directions Write a Review

NPPES record last updated: April 19, 2024. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Apr 19, 2024, May 9, 2018 (2 updates tracked since 2018).

About Nathaniel L Fox Md NPPES

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

NATHANIEL L FOX MD (NPI 1982193421) is an individual emergency medicine provider in Tucson, Arizona, licensed in Arizona (69476) and active in the NPI registry since May 2018. He is enrolled in Medicare PECOS and is a graduate of University Of New Mexico School Of Medicine (2018).

NPPES Registry Identity

NPI1982193421
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameNATHANIEL L FOXCredential: MD
Location Address1501 N CAMPBELL AVETucson, AZ 85724-5057
Mailing Address1501 N Campbell AveTucson, AZ 85724-0001
Phone(520) 626-7233
Sole ProprietorYes
Medical School CMSUniversity Of New Mexico School Of MedicineGraduated 2018
Enumeration DateMay 9, 2018
Last NPPES UpdateApril 19, 20242 updates tracked since enumeration
NPPES CertifiedApril 19, 2024
✔ NPI 1982193421 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in AZ · 69476
Definition
An emergency physician focuses on the immediate decision making and action necessary to prevent death or any further disability both in the pre-hospital setting by directing emergency medical technicians and in the emergency department. The emergency physician provides immediate recognition, evaluation, care, stabilization and disposition of a generally diversified population of adult and pediatric patients in response to acute illness and injury.
Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X
1501 N CAMPBELL AVE, Tucson, AZ 85724
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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona, Oscar Health Plan, Inc..Insurance ›

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Nathaniel L Fox Md 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 ID244581791
PECOS Enrollment IDI20231013001059
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show Nathaniel Fox reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ies Arizona PLLC
4.0 mi
Emergency Medicine
5301 E GRANT RD
Tucson, AZ 85712
  • Reassigned Medicare billing, Arizona enrollment
  • 121 clinicians in this Medicare group
NPI 1821752213 (520) 327-5461
Ies Obs Arizona PLLC
4.0 mi
Emergency Medicine
5301 E GRANT RD
Tucson, AZ 85712
  • Reassigned Medicare billing, Arizona enrollment
  • 41 clinicians in this Medicare group
NPI 1356006670 (469) 420-5527
Banner-University Medical Group
5.2 mi
Nutrition, Education
535 N WILMOT RD STE 101
Tucson, AZ 85711
  • Reassigned Medicare billing, Arizona enrollment
  • 1,514 clinicians in this Medicare group
NPI 1932708328 (520) 694-5437

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85724 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$85.89 typical visit price
range $55.44 – $168.60
Typical copayment $21.47 (range $13.86 – $42.15)
Most-billed visit code 99203
Established Patient
$98.00 typical visit price
range $17.72 – $137.41
Typical copayment $24.50 (range $4.43 – $34.35)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

MR. DOUGLAS FRANK LARSON PH.D.
Perfusionist
1501 N CAMPBELL AVE, SUITE 4402 ARIZONA HEALTH SCIENCE CENTER
TUCSON, AZ 85724
Pima County (520) 626-6339
MARTIN DEMANT
Pediatrics
1501 N CAMPBELL AVE
TUCSON, AZ 85724
Pima County (520) 626-6507
STEPHANIE RUNKE MD
Obstetrics & Gynecology
1501 N CAMPBELL AVE
TUCSON, AZ 85724
Pima County (520) 694-2530
ASHLEY AZIZI ASSADI MD
Pediatrics
1501 N CAMPBELL AVE
TUCSON, AZ 85724
Pima County (520) 626-7944
STUART HAMEROFF MD
Anesthesiology
1501 N CAMPBELL AVE
TUCSON, AZ 85724
Pima County (520) 694-8888
JOHN GUISTO MD
Emergency Medicine
1501 N CAMPBELL AVE
TUCSON, AZ 85724
Pima County (520) 874-3500
BALDASSARRE STEA MD, PHD
Radiology (Radiation Oncology)
1501 N CAMPBELL AVE
TUCSON, AZ 85724
Pima County (520) 694-7236
NAOMI E RANCE MD, PHD
Pathology (Neuropathology)
1501 N CAMPBELL AVE
TUCSON, AZ 85724
Pima County (520) 874-7400

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 Nathaniel Fox's NPI number?

The NPI number for Nathaniel Fox is 1982193421. It was assigned to this individual provider in the NPPES registry on May 9, 2018.

Where is Nathaniel Fox located?

Nathaniel Fox practices at 1501 N Campbell Ave, Tucson, AZ 85724. The listed phone number is (520) 626-7233.

What is Nathaniel Fox's specialty?

The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.

Is Nathaniel Fox enrolled in Medicare?

Yes. Nathaniel Fox 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.

Which organizations bill Medicare for Nathaniel Fox's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Nathaniel Fox reassigns Medicare benefits to 3 organizations: Ies Arizona PLLC (Tucson, AZ), Ies Obs Arizona PLLC (Tucson, AZ) and Banner-University Medical Group (Tucson, AZ). 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 Nathaniel Fox's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Nathaniel Fox accept?

Health plans from Blue Cross Blue Shield of Arizona and Oscar Health Plan, Inc. list Nathaniel Fox as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Nathaniel Fox was last updated on April 19, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 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.