Doctor profile · Federal record
Dr. Rena Callahan, M.D.
Internal Medicine Physician (CMS: Hematology/Oncology) · Hematology (Internal Medicine) Physician · Medical Oncology Physician · Surgical Oncology Physician · Valencia, CA
- NPI 1487856779
- Accepts Medicare
- MIPS 84.9 / 100 · 2023
- 22 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 3 locations .
- Primary practice
-
27235 Tourney RD Ste 2400
Valencia, CA 913555905
(661) 255-5350
fax (661) 255-9907 - Additional location
-
2020 Santa Monica Blvd Ste 230
Santa Monica, CA 904042124
(310) 829-5471
fax (310) 582-6294 - Additional location
-
2336 Santa Monica Blvd Ste 315
Santa Monica, CA 904042095
(310) 829-5471
fax (310) 829-6192 - Mailing address
-
5767 W Century Blvd Ste 400
Los Angeles, CA 900455631
Credentials & registration
- NPI registered
- May 2007 — 19 yrs on file
- Profile last updated
- January 23, 2020
- Year of graduation
- 2004 — 22 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #A94238
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1487856779. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
21,636
Distinct HCPCS
10
Medicare allowed
$465,506
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
J1453 |
Injection, fosaprepitant, 1 mg | 7,200 | 11 | $0 | |
J0897 |
Injection, denosumab, 1 mg | 6,060 | 36 | $23 | |
J9394 |
Injection, fulvestrant (fresenius kabi) not therapeutically equivalent to j9395, 25 mg | 1,740 | 18 | $18 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 1,053 | 402 | $140 | |
J1100 |
Injection, dexamethasone sodium phosphate, 1 mg | 835 | 18 | $0 | |
J2469 |
Injection, palonosetron hcl, 25 mcg | 830 | 16 | $1 | |
J2405 |
Injection, ondansetron hydrochloride, per 1 mg | 692 | 18 | $0 | |
J7050 |
Infusion, normal saline solution, 250 cc | 460 | 92 | $1 | |
85025 |
Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count | 454 | 139 | $8 | |
96375 |
Injection of additional new drug or substance into vein | 304 | 37 | $18 |
In context: peer comparison
Among 9 peers in Valencia Internal Medicine Physician, average services per provider: 291. This provider delivers 74× the peer median.Open Payments
Industry payments received
All-time total
$96,801
Transactions
92
Manufacturers
7
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Gilead Sciences, INC. | 55 | $57,864.06 | |
| Stemline Therapeutics INC. | 11 | $13,719.65 | |
| AstraZeneca Pharmaceuticals Lp | 9 | $7,607.22 | |
| Pfizer INC. | 6 | $7,250.06 | |
| Daiichi Sankyo INC. | 6 | $5,332.09 | |
| Lilly USA, LLC | 2 | $2,812.50 | |
| Novartis Pharmaceuticals Corporation | 3 | $2,215.61 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
582
Patients
126
Total drug cost
$1,654,354
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Anastrozole | Generic | 204 | 67 | $6,025 |
| Tamoxifen Citrate | Generic | 55 | 25 | $1,957 |
| Eliquis (Apixaban) | Brand | 51 | 0 | $35,018 |
| Letrozole | Generic | 43 | 12 | $1,400 |
| Verzenio (Abemaciclib) | Brand | 42 | 0 | $665,768 |
| Exemestane | Generic | 26 | 11 | $7,341 |
| Gammagard Liquid (Immun Glob G(Igg)/Gly/Iga Ov50) | Brand | 25 | 0 | $143,030 |
| Calquence (Acalabrutinib Maleate) | Brand | 21 | 0 | $292,691 |
| Hydroxyurea | Generic | 20 | 0 | $685 |
| Kisqali (Ribociclib Succinate) | Brand | 20 | 0 | $268,254 |
Hospital affiliations
Frequently asked questions
What is Dr. Rena Callahan's medical specialty?
Dr. Rena Callahan practices Internal Medicine Physician in Valencia, CA.
Where does Dr. Rena Callahan practice?
Dr. Rena Callahan practices at 27235 Tourney RD Ste 2400, Valencia, CA 913555905. Office phone: 6612555350.
What is Dr. Rena Callahan's NPI?
Dr. Rena Callahan's National Provider Identifier (NPI) is 1487856779, issued by NPPES.
Does Dr. Rena Callahan accept Medicare assignment?
Yes. Dr. Rena Callahan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Rena Callahan commonly perform?
Top Medicare-reported procedures in 2023: Injection, fosaprepitant, 1 mg (HCPCS J1453); Injection, denosumab, 1 mg (HCPCS J0897); Injection, fulvestrant (fresenius kabi) not therapeutically equivalent to j9395, 25 mg (HCPCS J9394). Source: CMS Medicare Physician & Other Practitioners file.