Active NPI 1992816169 Individual Practitioner Male Practitioner

Dr. Selwyn E. Mahon , MD

Emergency Medicine • Tamuning, GU

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Selwyn Mahon, MD is a certified Emergency Medicine practicing in Tamuning, GU. With approximately 36 years of clinical experience since graduating from Howard University College Of Medicine in 1990, Dr. Mahon delivers high-quality medical care to the local community at 850 GOV. CARLOS CAMACHO ROAD.

Dr. Mahon is affiliated with East Harbor Partners Pc and accepts Medicare assignment.

Frequently performed procedures and clinical services include emergency department visit with moderate level of medical decision making, emergency department visit for life threatening or functioning severity, emergency department visit with low level of medical decision making. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

850 Gov. Carlos Camacho Road
Guam Memorial Hospital Authority

Tamuning, GU 96913

Telephone 6716472350

Medicare Profile & Education

Medical School

Howard University College Of Medicine

Graduation Year

1990

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Emergency Medicine in Tamuning, GU

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

36 Yrs +10.8 yrs vs City Avg

City Avg: 25.2 Yrs

State Avg: 18.1 Yrs

Regional Practice Density

6 Specialists

Practicing in Tamuning, GU (29 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

81.2% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Mahon (36 Years) 36 Yrs

Tamuning Specialty Average (25.2 Years) 25.2 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99284 Emergency department visit with moderate level of medical decision making	89	87	$542.65	$118.57
99285 Emergency department visit for life threatening or functioning severity	56	56	$1130.50	$171.21
99283 Emergency department visit with low level of medical decision making	23	23	$234.22	$69.42

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99284 Emergency department visit with moderate level of medical decision making	63	62	$822.19	$121.36
99285 Emergency department visit for life threatening or functioning severity	60	60	$1410.78	$173.58
99283 Emergency department visit with low level of medical decision making	13	13	$494.08	$72.18
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	11	11	$85.94	$8.21

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	105	101	$1442.82	$180.63
99284 Emergency department visit with moderate level of medical decision making	56	51	$950.62	$122.77
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	35	35	$85.94	$8.42
99283 Emergency department visit with low level of medical decision making	21	20	$475.92	$73.72

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	120	117	$1433.12	$184.65
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	61	59	$85.94	$8.59
99284 Emergency department visit with moderate level of medical decision making	35	32	$971.52	$126.60
99291 Critical care, first 30-74 minutes	11	11	$1854.64	$226.28

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	106	100	$1433.12	$179.83
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	64	58	$85.94	$8.77
99284 Emergency department visit with moderate level of medical decision making	28	28	$971.52	$124.90

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	69	67	$1433.12	$178.56
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	51	44	$85.94	$8.78
99284 Emergency department visit with moderate level of medical decision making	28	26	$971.52	$121.31
71045 X-ray of chest, 1 view	13	13	$40.00	$9.52

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	214	197	$1433.12	$178.21
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	145	129	$85.94	$8.77
99284 Emergency department visit with moderate level of medical decision making	55	51	$971.52	$121.02
99283 Emergency department visit with low level of medical decision making	27	22	$584.38	$63.88
99291 Critical care, first 30-74 minutes	15	15	$1854.64	$229.97

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	17	17	$398.00	$176.27

Medical Specialties & State Licenses

Emergency Medicine Primary Specialty

NUCC Taxonomy Code: 207P00000X

State License VI 1119

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.

Hospital & Practice Group Affiliations

East Harbor Partners Pc

3001 Park Ctr Dr, Alexandria, VA 223021442

Phone: 8575755831

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

2 Associated Practitioners

Kristy Joy Mary , RDN, LD

Dietitian, Registered

NPI 1255981502

Registered Dietitian Nutritionist, Licensed Dietitian

Dr. Reynald Lim , MD

Anesthesiology

NPI 1679549869

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events

✅

NPI Profile Active March 23, 2016

NPI status registered as active in NPPES database

📍

Updated Practice Location March 23, 2016

Registered at 850 GOV. CARLOS CAMACHO ROAD, GUAM MEMORIAL HOSPITAL AUTHORITY, TAMUNING, GU 96913 (Tel: 6716472350)

📍

Updated Business Mailing Address March 23, 2016

Registered at 6603 EVANSTON ST., FORESTVILLE, MD 20747 (Tel: 3016338820)

👤

Provider Name / Credentials Updated March 23, 2016

Recorded as SELWYN MAHON, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) March 23, 2016

Emergency Medicine (License #1119 in VI)

🟢

Initial NPI Registration & Enumeration August 31, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1992816169

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: August 31, 2006

Last Update: March 23, 2016

Sole Proprietor: No

Update or Correct Profile

Mailing Address

6603 Evanston St.

Forestville, MD 20747

Phone: 3016338820

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.