Aaron C. Johansen, MD
Emergency Medicine Physician · Oka Tamuning, GU
Aaron C. Johansen, MD is an emergency medicine physician with a practice address in Oka Tamuning, Guam, and NPI 1639226863, issued on Jan 3, 2007. Check the license (Guam M001271, as entered in NPPES) with the Guam board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Aaron C. Johansen
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- M001271 GU
Self-reported in NPPES; status is on the state search - Practice location
- 850 Governor Carlos Camacho Road, Oka Tamuning, GU 96913
- Phone
- (671) 647-2418
- Enumerated
- Jan 3, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (671) 649-5508
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 29 in Guam → Look up another NPI →
Also registered at 850 Governor Carlos Camacho Road
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Robert Kwok, MDDiagnostic Radiology Physician1710043609
- James Last, MDEmergency Medicine Physician1760539472
- Arthur Loerzel, MD FCAPAnatomic Pathology Physician1851448096
Verify Aaron C. Johansen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Guam board licenses this profession
Search for license M001271Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Aaron C. Johansen among 29 emergency medicine physician records in Guam
Aaron C. Johansen, MD is one of 29 emergency medicine physician records with a practice address in Guam. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 24% of them.
- NPI issued2007 · 24% of these records are older, 59% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 72% of these records are
- Record last updated2007 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Guam practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2 emergency medicine physician records list a practice address in Oka Tamuning
They are 2 of the 13 NPPES records with a practice address in Oka Tamuning, and 29 emergency medicine physician records in Guam.
All 29 in Guam → Every provider in Oka Tamuning → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Eric Greenfield, D.OTamuning, GU 969131457558025
- James Last, MDOka Tamuning, GU 969131760539472
- Selwyn Mahon, M.D.Tamuning, GU 969131992816169
- Robert MichaudTamuning, GU 969131063615797
- Shawn Reed, MDTamuning, GU 969131518607647
- Angelito Santos, MDTamuning, GU 969131447280680
- Trenton Scheibe, MDTamuning, GU 969131063630606
- Kathryn Guffrey, M.D.Dededo, GU 969121144512252
Common questions
What is Aaron C. Johansen, MD's NPI number?
Aaron C. Johansen, MD's National Provider Identifier (NPI) is 1639226863, issued on Jan 3, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Aaron C. Johansen, MD located?
The NPPES record lists a practice address at 850 Governor Carlos Camacho Road, Oka Tamuning, GU, 96913. Phone: (671) 647-2418. Providers update this record themselves, so call before visiting.
How can I verify Aaron C. Johansen, MD's license?
NPPES lists Guam license number M001271, as entered by the provider. Search the Guam board that licenses this profession; the NPPES record confirms identity only.
What is Aaron C. Johansen, MD's MIPS final score?
The 2023 MIPS final score is 100 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.