Doctor profile · Federal record
Dr. Stephen Marer, MD
Infectious Disease Physician (CMS: Internal Medicine) · Internal Medicine Physician · Los Angeles, CA
- NPI 1043281322
- Accepts Medicare
- 32 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
1520 San Pablo St Ste 1000
Los Angeles, CA 900335312
(323) 442-5100 - Additional location
-
3400 Lomita Blvd, Ste 104
Torrance, CA 90505
(310) 326-5648
fax (310) 326-5679 - Mailing address
-
Po Box 31309
Los Angeles, CA 900310309
Credentials & registration
- NPI registered
- January 2006 — 20 yrs on file
- Profile last updated
- November 3, 2022
- Year of graduation
- 1994 — 32 yrs since
- Specialty taxonomy
- 207RI0200X — NUCC code
- State license (1)
- California #A55306
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1043281322. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
593
Distinct HCPCS
5
Medicare allowed
$67,779
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 216 | 88 | $82 | |
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 191 | 102 | $125 | |
99239 |
Hospital discharge day management, more than 30 minutes | 114 | 113 | $121 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 58 | 57 | $182 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 14 | 14 | $137 |
In context: peer comparison
Among 39 peers in Los Angeles Infectious Disease Physician, average services per provider: 181. This provider delivers 3.3× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
81
Patients
75
Total drug cost
$798
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 32 | 26 | $451 |
| Amlodipine Besylate | Generic | 14 | 14 | $89 |
| Cefdinir | Generic | 12 | 12 | $155 |
| Furosemide | Generic | 12 | 12 | $43 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 11 | 11 | $61 |
Frequently asked questions
What is Dr. Stephen Marer's medical specialty?
Dr. Stephen Marer practices Infectious Disease Physician in Los Angeles, CA.
Where does Dr. Stephen Marer practice?
Dr. Stephen Marer practices at 1520 San Pablo St Ste 1000, Los Angeles, CA 900335312. Office phone: 3234425100.
What is Dr. Stephen Marer's NPI?
Dr. Stephen Marer's National Provider Identifier (NPI) is 1043281322, issued by NPPES.
Does Dr. Stephen Marer accept Medicare assignment?
Yes. Dr. Stephen Marer accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Stephen Marer 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); Hospital discharge day management (HCPCS 99239). Source: CMS Medicare Physician & Other Practitioners file.