Doctor profile · Federal record
Dr. John Mahan, MD
Hospitalist Physician · Internal Medicine Physician · Great Falls, MT
- NPI 1346241296
- MIPS 80.5 / 100 · 2023
- 21 yrs on file
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1101 26Th St S
Great Falls, MT 594055161
(406) 731-8888
fax (406) 731-8876
Credentials & registration
- NPI registered
- August 2005 — 21 yrs on file
- Profile last updated
- April 8, 2024
- Specialty taxonomy
- 208M00000X — NUCC code
- State license (1)
- Montana #7173
- Medicaid
- MT #0096720
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1346241296. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,116
Distinct HCPCS
5
Medicare allowed
$114,449
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 405 | 157 | $79 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 396 | 176 | $119 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 152 | 88 | $50 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 151 | 143 | $173 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 12 | 12 | $130 |
In context: peer comparison
Among 12 peers in this city , average services per provider: 139. This provider delivers 8.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
191
Patients
166
Total drug cost
$1,749
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 27 | 26 | $248 |
| Metoprolol Succinate | Generic | 25 | 21 | $203 |
| Trazodone Hcl | Generic | 24 | 24 | $108 |
| Amlodipine Besylate | Generic | 23 | 23 | $81 |
| Atorvastatin Calcium | Generic | 21 | 20 | $210 |
| Clopidogrel (Clopidogrel Bisulfate) | Brand | 21 | 15 | $149 |
| Tamsulosin Hcl | Generic | 14 | 14 | $170 |
| Levetiracetam | Generic | 12 | 0 | $311 |
| Losartan Potassium | Generic | 12 | 11 | $66 |
| Olmesartan Medoxomil | Generic | 12 | 12 | $203 |
Frequently asked questions
What is Dr. John Mahan's medical specialty?
Dr. John Mahan practices Hospitalist Physician in Great Falls, MT.
Where does Dr. John Mahan practice?
Dr. John Mahan practices at 1101 26Th St S, Great Falls, MT 594055161. Office phone: 4067318888.
What is Dr. John Mahan's NPI?
Dr. John Mahan's National Provider Identifier (NPI) is 1346241296, issued by NPPES.
What procedures does Dr. John Mahan commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Subsequent hospital care with straightforward or low level of medical decision making (HCPCS 99231). Source: CMS Medicare Physician & Other Practitioners file.