Doctor profile · Federal record
Dr. Mark Tamsen, MD
Emergency Medicine Physician (CMS: Emergency Medicine) · San Diego, CA
- NPI 1346241452
- Accepts Medicare
- MIPS 0.0 / 100 · 2023
- 47 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
3434 Midway Dr Ste 1002
San Diego, CA 921104924
(619) 225-6200
fax (619) 225-6208 - Mailing address
-
Po Box 370630
San Diego, CA 921370630
Credentials & registration
- NPI registered
- August 2005 — 21 yrs on file
- Profile last updated
- December 16, 2020
- Year of graduation
- 1979 — 47 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- California #G64400
- Medicaid
- CA #00G644000
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1346241452. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
853
Distinct HCPCS
9
Medicare allowed
$89,715
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 280 | 157 | $97 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 211 | 86 | $135 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 87 | 87 | $120 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 77 | 43 | $191 | |
81001 |
Manual urinalysis test with examination using microscope, automated | 56 | 33 | $3 | |
96372 |
Injection of drug or substance under skin or into muscle | 49 | 38 | $16 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 40 | 40 | $177 | |
J1885 |
Injection, ketorolac tromethamine, per 15 mg | 36 | 25 | $1 | |
G0268 |
Removal of impacted cerumen (one or both ears) by physician on same date of service as audiologic function testing | 17 | 11 | $57 |
In context: peer comparison
Among 130 peers in San Diego Emergency Medicine Physician, average services per provider: 67. This provider delivers 13× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,388
Patients
639
Total drug cost
$19,680
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Amlodipine Besylate | Generic | 150 | 22 | $919 |
| Doxycycline Hyclate | Generic | 138 | 110 | $2,689 |
| Cefuroxime (Cefuroxime Axetil) | Brand | 133 | 105 | $2,368 |
| Cephalexin | Generic | 120 | 91 | $1,095 |
| Meloxicam | Generic | 111 | 19 | $596 |
| Oxycodone-Acetaminophen (Oxycodone Hcl/Acetaminophen) | Brand | 105 | 17 | $3,355 |
| Azithromycin | Generic | 104 | 87 | $638 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 82 | 31 | $1,801 |
| Sulfamethoxazole-Trimethoprim (Sulfamethoxazole/Trimethoprim) | Brand | 77 | 56 | $359 |
| Lisinopril | Generic | 70 | 0 | $357 |
Frequently asked questions
What is Dr. Mark Tamsen's medical specialty?
Dr. Mark Tamsen practices Emergency Medicine Physician in San Diego, CA.
Where does Dr. Mark Tamsen practice?
Dr. Mark Tamsen practices at 3434 Midway Dr Ste 1002, San Diego, CA 921104924. Office phone: 6192256200.
What is Dr. Mark Tamsen's NPI?
Dr. Mark Tamsen's National Provider Identifier (NPI) is 1346241452, issued by NPPES.
Does Dr. Mark Tamsen accept Medicare assignment?
Yes. Dr. Mark Tamsen accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Tamsen commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99203). Source: CMS Medicare Physician & Other Practitioners file.