Doctor profile · Federal record
Dr. Mark Isaeff, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · San Antonio, TX
- NPI 1104815075
- Accepts Medicare
- 28 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
1303 McCullough Ave, Suite 542
San Antonio, TX 782125607
(210) 572-4431
fax (210) 572-4435
Credentials & registration
- NPI registered
- October 2005 — 21 yrs on file
- Profile last updated
- April 21, 2011
- Year of graduation
- 1998 — 28 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Texas #K8638
- Medicaid (2)
- TX #144897204 · TX #144867202
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1104815075. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
470
Distinct HCPCS
2
Medicare allowed
$54,658
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 429 | 168 | $122 | |
99441 |
Telephone medical discussion with physician, 5-10 minutes | 41 | 38 | $54 |
In context: peer comparison
Among 172 peers in this city , average services per provider: 137. This provider delivers 3.4× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,745
Patients
574
Total drug cost
$162,307
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Rosuvastatin Calcium | Generic | 298 | 89 | $4,472 |
| Losartan Potassium | Generic | 197 | 54 | $3,109 |
| Carvedilol | Generic | 181 | 46 | $2,305 |
| Levothyroxine Sodium | Generic | 175 | 48 | $2,608 |
| Spironolactone | Generic | 164 | 49 | $2,166 |
| Amlodipine Besylate | Generic | 89 | 25 | $774 |
| Vascepa (Icosapent Ethyl) | Brand | 81 | 27 | $39,826 |
| Metoprolol Succinate | Generic | 80 | 23 | $1,569 |
| Famotidine | Generic | 77 | 28 | $2,025 |
| Duloxetine Hcl | Generic | 69 | 20 | $1,879 |
Frequently asked questions
What is Dr. Mark Isaeff's medical specialty?
Dr. Mark Isaeff practices Internal Medicine Physician in San Antonio, TX.
Where does Dr. Mark Isaeff practice?
Dr. Mark Isaeff practices at 1303 McCullough Ave, San Antonio, TX 782125607. Office phone: 2105724431.
What is Dr. Mark Isaeff's NPI?
Dr. Mark Isaeff's National Provider Identifier (NPI) is 1104815075, issued by NPPES.
Does Dr. Mark Isaeff accept Medicare assignment?
Yes. Dr. Mark Isaeff accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mark Isaeff commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Telephone medical discussion with physician (HCPCS 99441). Source: CMS Medicare Physician & Other Practitioners file.