Doctor profile · Federal record
Dr. Mariana Chavez Mac Gregor, M.D., M.S.C.
Internal Medicine Physician (CMS: Medical Oncology) · Internal Medicine Physician · Houston, TX
- NPI 1740408624
- Accepts Medicare
- MIPS 79.4 / 100 · 2023
- 23 yrs in practice
- Licensed in 2 states
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1515 Holcombe Blvd
Houston, TX 770304009
(713) 792-6161 - Mailing address
-
Po Box 4439
Houston, TX 772104439
Credentials & registration
- NPI registered
- April 2007 — 19 yrs on file
- Profile last updated
- June 20, 2012
- Year of graduation
- 2003 — 23 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State licenses (2)
- Texas #P2211 · Missouri #2005015456
- Medicaid
- TX #281651401
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1740408624. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
160
Distinct HCPCS
3
Medicare allowed
$20,407
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 85 | 29 | $144 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 64 | 39 | $98 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 11 | 11 | $174 |
In context: peer comparison
Among 393 peers in this city , average services per provider: 127. This provider delivers 1.3× the peer median.Open Payments
Industry payments received
All-time total
$22,332
Transactions
19
Manufacturers
7
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Genentech, Inc. | 3 | $7,539.20 | |
| AstraZeneca UK Limited | 5 | $5,047.00 | |
| Dr.Reddy's Laboratories,Inc. | 2 | $2,950.00 | |
| AstraZeneca Pharmaceuticals LP | 5 | $2,770.00 | |
| Daiichi Sankyo Inc. | 2 | $1,712.50 | |
| Eli Lilly and Company | 1 | $1,600.00 | |
| F. Hoffmann-La Roche AG | 1 | $712.80 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
34
Patients
0
Total drug cost
$2,160
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Exemestane | Generic | 12 | 0 | $1,641 |
| Anastrozole | Generic | 11 | 0 | $347 |
| Letrozole | Generic | 11 | 0 | $172 |
Frequently asked questions
What is Dr. Mariana Chavez Mac Gregor's medical specialty?
Dr. Mariana Chavez Mac Gregor practices Internal Medicine Physician in Houston, TX.
Where does Dr. Mariana Chavez Mac Gregor practice?
Dr. Mariana Chavez Mac Gregor practices at 1515 Holcombe Blvd, Houston, TX 770304009. Office phone: 7137926161.
What is Dr. Mariana Chavez Mac Gregor's NPI?
Dr. Mariana Chavez Mac Gregor's National Provider Identifier (NPI) is 1740408624, issued by NPPES.
Does Dr. Mariana Chavez Mac Gregor accept Medicare assignment?
Yes. Dr. Mariana Chavez Mac Gregor accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Mariana Chavez Mac Gregor commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); Established patient office or other outpatient visit (HCPCS 99214); New patient office or other outpatient visit (HCPCS 99205). Source: CMS Medicare Physician & Other Practitioners file.