Doctor profile · Federal record
Dr. Billie Marek, MD
Medical Oncology Physician (CMS: Medical Oncology) · McAllen, TX
- NPI 1346282209
- Accepts Medicare
- MIPS 86.7 / 100 · 2023
- 43 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1901 S 2Nd St
McAllen, TX 785031271
(956) 687-5150
fax (956) 687-9546 - Mailing address
-
Po Box 911230
Dallas, TX 753911230
Credentials & registration
- NPI registered
- June 2006 — 20 yrs on file
- Profile last updated
- August 31, 2017
- Year of graduation
- 1983 — 43 yrs since
- Specialty taxonomy
- 207RX0202X — NUCC code
- State license (1)
- Texas #H3700
- Medicaid (4)
- TX #132633202 · TX #132633205 · TX #132633201 · TX #132633207
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1346282209. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
134,172
Distinct HCPCS
10
Medicare allowed
$2,017,427
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
Q0138 |
Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) | 38,250 | 25 | $1 | |
J9263 |
Injection, oxaliplatin, 0.5 mg | 28,200 | 19 | $0 | |
J9271 |
Injection, pembrolizumab, 1 mg | 23,200 | 28 | $54 | |
Q9967 |
Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml | 6,830 | 74 | $0 | |
Q5106 |
Injection, epoetin alfa-epbx, biosimilar, (retacrit) (for non-esrd use), 1000 units | 5,740 | 38 | $8 | |
J0881 |
Injection, darbepoetin alfa, 1 microgram (non-esrd use) | 5,175 | 14 | $3 | |
J0461 |
Injection, atropine sulfate, 0.01 mg | 3,200 | 18 | $0 | |
J0897 |
Injection, denosumab, 1 mg | 2,820 | 14 | $24 | |
J1100 |
Injection, dexamethasone sodium phosphate, 1 mg | 2,311 | 63 | $0 | |
J1568 |
Injection, immune globulin, (octagam), intravenous, non-lyophilized (e.g., liquid), 500 mg | 2,258 | 11 | $42 |
In context: peer comparison
Among 5 peers in McAllen Medical Oncology Physician, average services per provider: 1,175. This provider delivers 114× the peer median.Open Payments
Industry payments received
All-time total
$107
Transactions
5
Manufacturers
5
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Eisai INC. | 1 | $25.89 | |
| E.R. Squibb & Sons, L.L.C. | 1 | $23.70 | |
| Medtronic, INC. | 1 | $23.46 | |
| Regeneron Healthcare Solutions, INC. | 1 | $17.02 | |
| Novartis Pharmaceuticals Corporation | 1 | $17.00 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
586
Patients
79
Total drug cost
$818,533
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Letrozole | Generic | 118 | 27 | $3,009 |
| Anastrozole | Generic | 101 | 31 | $2,718 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 58 | 21 | $2,908 |
| Levothyroxine Sodium | Generic | 38 | 0 | $675 |
| Dexamethasone | Generic | 33 | 0 | $364 |
| Revlimid (Lenalidomide) | Brand | 31 | 0 | $519,805 |
| Potassium Chloride | Generic | 27 | 0 | $453 |
| Eliquis (Apixaban) | Brand | 26 | 0 | $14,327 |
| Pantoprazole Sodium | Generic | 26 | 0 | $293 |
| Ondansetron Odt (Ondansetron) | Brand | 25 | 0 | $420 |
Hospital affiliations
Frequently asked questions
What is Dr. Billie Marek's medical specialty?
Dr. Billie Marek practices Medical Oncology Physician in McAllen, TX.
Where does Dr. Billie Marek practice?
Dr. Billie Marek practices at 1901 S 2Nd St, McAllen, TX 785031271. Office phone: 9566875150.
What is Dr. Billie Marek's NPI?
Dr. Billie Marek's National Provider Identifier (NPI) is 1346282209, issued by NPPES.
Does Dr. Billie Marek accept Medicare assignment?
Yes. Dr. Billie Marek accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Billie Marek commonly perform?
Top Medicare-reported procedures in 2023: Injection, ferumoxytol, for treatment of iron deficiency anemia, 1 mg (non-esrd use) (HCPCS Q0138); Injection, oxaliplatin, 0.5 mg (HCPCS J9263); Injection, pembrolizumab, 1 mg (HCPCS J9271). Source: CMS Medicare Physician & Other Practitioners file.