Doctor profile · Federal record
Dr. Selwyn Mahon, M.D.
Emergency Medicine Physician (CMS: Emergency Medicine) · Tamuning, GU
- NPI 1992816169
- Accepts Medicare
- 36 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
850 Gov. Carlos Camacho Road, Guam Memorial Hospital Authority
Tamuning, GU 96913
(671) 647-2350 - Mailing address
-
6603 Evanston St.
Forestville, MD 20747
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- March 23, 2016
- Year of graduation
- 1990 — 36 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- Virgin Islands #1119
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1992816169. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
147
Distinct HCPCS
4
Medicare allowed
$19,089
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99284 |
Emergency department visit with moderate level of medical decision making | 63 | 62 | $121 | |
99285 |
Emergency department visit with high level of medical decision making | 60 | 60 | $174 | |
99283 |
Emergency department visit with low level of medical decision making | 13 | 13 | $72 | |
93010 |
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only | 11 | 11 | $8 |
In context: peer comparison
Among 4 peers in Tamuning Emergency Medicine Physician, average services per provider: 64. This provider delivers 2.3× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Selwyn Mahon's medical specialty?
Dr. Selwyn Mahon practices Emergency Medicine Physician in Tamuning, GU.
Where does Dr. Selwyn Mahon practice?
Dr. Selwyn Mahon practices at 850 Gov. Carlos Camacho Road, Tamuning, GU 96913. Office phone: 6716472350.
What is Dr. Selwyn Mahon's NPI?
Dr. Selwyn Mahon's National Provider Identifier (NPI) is 1992816169, issued by NPPES.
Does Dr. Selwyn Mahon accept Medicare assignment?
Yes. Dr. Selwyn Mahon accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Selwyn Mahon commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with moderate level of medical decision making (HCPCS 99284); Emergency department visit with high level of medical decision making (HCPCS 99285); Emergency department visit with low level of medical decision making (HCPCS 99283). Source: CMS Medicare Physician & Other Practitioners file.