1. Home
  2. Directory
  3. Arizona
  4. Tucson
  5. Emergency Medicine
  6. NPI Profile

DR. CHARLES JOHN PETERSON MD
NPI 1437234499
Emergency Medicine in Tucson, AZ

Active since October 26, 2006PECOS EnrolledAccepts Medicare Assignment
5301 E GRANT ROAD, TUCSON MEDICAL CENTER EMERGENCY DEPARTMENT, TUCSON, AZ 85712(520) 324-1922(520) 324-1088 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: October 18, 2026.

About Dr. Charles John Peterson Md NPPES

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

DR. CHARLES JOHN PETERSON MD (NPI 1437234499) is an individual emergency medicine provider in Tucson, Arizona, licensed in Arizona (21030) and active in the NPI registry since October 2006. He is enrolled in Medicare PECOS and is a graduate of Oregon Health Sciences University School Of Medicine (1990).

NPPES Registry Identity

NPI1437234499
Entity TypeIndividualMale
Primary Taxonomy207P00000X
Provider Legal NameDR. CHARLES JOHN PETERSONCredential: MD
Location Address5301 E GRANT ROAD, TUCSON MEDICAL CENTER EMERGENCY DEPARTMENTTucson, AZ 85712-2805
Mailing Address5700 E Pima Street, Suite BTucson, AZ 85712-5601 · (520) 382-2819 · Fax (520) 382-2832
Phone(520) 324-1922
Fax(520) 324-1088
Sole ProprietorNo
Medical School CMSOregon Health Sciences University School Of MedicineGraduated 1990
Enumeration DateOctober 26, 2006
Last NPPES UpdateJuly 8, 2007
✔ NPI 1437234499 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207P00000X
License✔ Licensed in AZ · 21030
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.
5301 E GRANT ROAD, Tucson, AZ 85712
Open in Google Maps ↗

Other Identifiers 4

Medicare UPINF69477
Medicare ID-Type UnspecifiedZ24422
Other150384AZ · Ahcccs
Medicaid15038402AZ

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross Blue Shield of Arizona.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

Dr. Charles John Peterson 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 ID8325163223
PECOS Enrollment IDI20100915001164
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

2

Medicare enrollment records show Charles Peterson reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Ies Arizona PLLC
Same address
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
Same address
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

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 4

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.

Emergency department visit with high level of medical decision making 99285
An emergency department visit for severe conditions is when you urgently seek medical help due to serious health issues. These could be severe injuries, breathing problems, unbearable pain, or sudden severe illness. Doctors and nurses will provide immediate care to stabilize your condition.
351 services342 patients
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010
A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.
302 services276 patients
Critical care, first 30-74 minutes 99291
Critical care involves immediate and constant attention by a team of specially-trained health professionals. It's for patients with life-threatening conditions, requiring first 30-74 minutes of intense monitoring and treatment.
114 services112 patients
Emergency department visit with moderate level of medical decision making 99284
An emergency department visit for a high-severity issue means you're experiencing a serious health problem that needs immediate attention. This could be a severe injury, serious illness, or life-threatening condition. Medical professionals will provide urgent care to stabilize your condition.
14 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 85712 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 14

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. CHRISTOPHER SCOTT FLORENCE MD
Emergency Medicine
5301 E GRANT ROAD, TUCSON MEDICAL CENTER EMERGENCY DEPARTMENT
TUCSON, AZ 85712
Pima County (520) 324-1922
DR. DONALD LEE KANE DO
Pediatrics (Pediatric Emergency Medicine)
5301 E GRANT ROAD, TUCSON MEDICAL CENTER EMERGENCY DEPARTMENT
TUCSON, AZ 85712
Pima County (520) 324-1922
DR. RONALD JOSEPH WIDMAN MD
Emergency Medicine
5301 E GRANT ROAD, TUCSON MEDICAL CENTER EMERGENCY DEPARTMENT
TUCSON, AZ 85712
Pima County (520) 324-1922
DR. BRIAN PATRICK HAGERTY MD
Pediatrics (Pediatric Emergency Medicine)
5301 E GRANT ROAD, TUCSON MEDICAL CENTER EMERGENCY DEPARTMENT
TUCSON, AZ 85712
Pima County (520) 324-1922
DR. KEITH ROSS KABACK MD
Emergency Medicine
5301 E GRANT ROAD, TUCSON MEDICAL CENTER EMERGENCY DEPARTMENT
TUCSON, AZ 85712
Pima County (520) 324-1922
DR. KENT VANTUYL CAREY MD
Emergency Medicine
5301 E GRANT ROAD, TUCSON MEDICAL CENTER EMERGENCY DEPARTMENT
TUCSON, AZ 85712
Pima County (520) 324-1922
VIVEK MAHADEVAIAH
Student in an Organized Health Care Education/Training Program
5301 E GRANT ROAD
TUCSON, AZ 85712
Pima County (520) 324-5095
DR. DAVID EUGENE COMPTON MD
Emergency Medicine
5301 E GRANT ROAD, TUCSON MEDICAL CENTER EMERGENCY DEPARTMENT
TUCSON, AZ 85712
Pima County (520) 324-1922

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 Charles Peterson's NPI number?

The NPI number for Charles Peterson is 1437234499. It was assigned to this individual provider in the NPPES registry on October 26, 2006.

Where is Charles Peterson located?

Charles Peterson practices at 5301 E Grant Road Tucson Medical Center Emergency Department, Tucson, AZ 85712. The listed phone number is (520) 324-1922.

What is Charles Peterson's specialty?

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

Is Charles Peterson enrolled in Medicare?

Yes. Charles Peterson 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 Charles Peterson's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Charles Peterson reassigns Medicare benefits to 2 organizations: Ies Arizona PLLC (Tucson, AZ) and Ies Obs Arizona PLLC (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 Charles Peterson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Charles Peterson accept?

Health plans from Blue Cross Blue Shield of Arizona list Charles Peterson 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 Charles Peterson was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.