DR. AARON C JOHANSEN MD
NPI 1639226863
Emergency Medicine in Oka Tamuning, GU

Q: What is Aaron Johansen's NPI number?

The NPI number for Aaron Johansen is 1639226863. It was assigned to this individual provider in the NPPES registry on January 3, 2007.

Q: What is Aaron Johansen's specialty?

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

Q: When was this NPI record last updated?

The NPPES record for Aaron Johansen 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.

Active since January 03, 2007PECOS EnrolledAccepts Medicare Assignment

100/100

CMS Quality Rating

850 GOVERNOR CARLOS CAMACHO ROAD, OKA TAMUNING, GU 96913(671) 647-2418(671) 649-5508 Get Directions Write a Review

NPPES record last updated: July 8, 2007. Verified against the NPPES registry weekly; last sync: November 01, 2026.

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About Dr. Aaron C Johansen Md NPPES

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

DR. AARON C JOHANSEN MD (NPI 1639226863) is an individual emergency medicine provider in Oka Tamuning, Guam, licensed in Guam (M001271) and active in the NPI registry since January 2007. He is enrolled in Medicare PECOS, is affiliated with Guam Memorial Hospital Authority, and is a graduate of George Washington University School Of Medicine (1992).

NPPES Registry Identity

NPI1639226863

Entity TypeIndividualMale

Primary Taxonomy207P00000X

Provider Legal NameDR. AARON C JOHANSENCredential: MD

Location Address850 GOVERNOR CARLOS CAMACHO ROADOka Tamuning, GU 96913-3128

Mailing Address850 Governor Carlos Camacho RoadOka Tamuning, GU 96913-3128 · (671) 647-2418 · Fax (671) 649-5508

Phone(671) 647-2418

Fax(671) 649-5508

Sole ProprietorNo

Medical School CMSGeorge Washington University School Of MedicineGraduated 1992

Enumeration DateJanuary 3, 2007

Last NPPES UpdateJuly 8, 2007

✔ NPI 1639226863 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyEmergency MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207P00000X

License✔ Licensed in GU · M001271

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.

850 GOVERNOR CARLOS CAMACHO ROAD, Oka Tamuning, GU 96913

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Other Identifiers 2

Medicare UPINF73047

Other51510Pin

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. Aaron C Johansen 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 ID2365618162

PECOS Enrollment IDI20111228000607

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 Reassignment

Medicare enrollment records show Aaron Johansen reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Guam Memorial Hospital

General Acute Care Hospital

850 GOVERNOR CARLOS CAMACHO ROAD
Oka Tamuning, GU 96913

Reassigned Medicare billing, Guam enrollment
320 clinicians in this Medicare group

NPI 1366519027 (671) 647-2937

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.

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.

112 services101 patients

Emergency department visit with low level of medical decision making 99283

An emergency department visit for a problem of moderate severity involves immediate medical attention for issues like minor fractures, burns, or high fever. The healthcare team will assess your condition, provide necessary treatment, and may suggest further tests or admission if required.

61 services54 patients

Emergency department visit with straightforward medical decision making 99282

An emergency department visit for a mild to moderate issue is when you seek immediate medical attention for a non-life-threatening condition. This could include minor injuries, moderate pain, or illnesses like the flu. During the visit, healthcare professionals assess your condition, provide treatment, and may recommend follow-up care.

19 services18 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Guam Memorial Hospital Authority

Acute Care Hospitals · Tamuning, GU

2/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number650001

Location85O Gov Carlos G Camacho RoadTamuning, GU 96913 · Guam County

Emergency services

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 96913 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

$92.50 typical visit price

range $60.53 – $180.05

Typical copayment $23.12 (range $15.13 – $45.01)

Most-billed visit code 99203

Established Patient

$105.65 typical visit price

range $20.09 – $147.56

Typical copayment $26.41 (range $5.02 – $36.89)

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.

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.

100/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

92.62

Improvement Activities

Cost

100

Other Providers at the Same Location NPPES 16

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

DR. JAMES W MURPHY MD FACEP

Emergency Medicine (Emergency Medical Services)