Doctor profile · Federal record
Dr. Matthew Callahan, M.D.
Hospitalist Physician (CMS: Hospitalist) · Family Medicine Physician · San Diego, CA
- NPI 1083901839
- Accepts Medicare
- 15 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
4077 Fifth Ave, Mer 127
San Diego, CA 921032105
(619) 260-7125
fax (619) 686-3874 - Mailing address
-
10790 Rancho Bernardo RD
San Diego, CA 921275705
Credentials & registration
- NPI registered
- June 2011 — 15 yrs on file
- Profile last updated
- November 20, 2019
- Year of graduation
- 2011 — 15 yrs since
- Specialty taxonomy
- 208M00000X — NUCC code
- State license (1)
- California #131315
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1083901839. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
400
Distinct HCPCS
4
Medicare allowed
$30,141
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 164 | 69 | $51 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 156 | 67 | $82 | |
99239 |
Hospital discharge day management, more than 30 minutes | 65 | 63 | $119 | |
99238 |
Hospital discharge day management, 30 minutes or less | 15 | 15 | $84 |
In context: peer comparison
Among 58 peers in this city , average services per provider: 101. This provider delivers 4.0× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
57
Patients
52
Total drug cost
$384
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Pantoprazole Sodium | Generic | 17 | 16 | $149 |
| Prednisone | Generic | 14 | 11 | $86 |
| Amlodipine Besylate | Generic | 13 | 12 | $113 |
| Furosemide | Generic | 13 | 13 | $35 |
Frequently asked questions
What is Dr. Matthew Callahan's medical specialty?
Dr. Matthew Callahan practices Hospitalist Physician in San Diego, CA.
Where does Dr. Matthew Callahan practice?
Dr. Matthew Callahan practices at 4077 Fifth Ave, San Diego, CA 921032105. Office phone: 6192607125.
What is Dr. Matthew Callahan's NPI?
Dr. Matthew Callahan's National Provider Identifier (NPI) is 1083901839, issued by NPPES.
Does Dr. Matthew Callahan accept Medicare assignment?
Yes. Dr. Matthew Callahan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Matthew Callahan commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with straightforward or low level of medical decision making (HCPCS 99231); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Hospital discharge day management (HCPCS 99239). Source: CMS Medicare Physician & Other Practitioners file.