Guillermo Montalban Bravo, MD
NPI 1487156782 · Hematology & Oncology Physician · Houston, TX
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Guillermo Montalban Bravo, MD is a Hematology & Oncology Physician provider in Houston, TX (NPI 1487156782).
Provider details
- NPI number
- 1487156782
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 46000 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
8 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
779 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 307 | $118 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 208 | $96 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 102 | $64 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 39 | $182 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 39 | $111 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Venetoclaxbrand: Venclexta | 38 | 17 |
| Levofloxacin | 35 | 21 |
| Valacyclovir Hclbrand: Valacyclovir | 23 | 12 |
| Allopurinol | 14 | 12 |
| Isavuconazonium Sulfatebrand: Cresemba | 13 | — |
| Voriconazole | 12 | — |
| Posaconazole | 11 | — |
| Asciminib Hydrochloride |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$177 across 2 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2018-03-02
- Last updated
- 2025-06-25
- Certified
- 2025-06-25
Frequently asked questions
- What is Guillermo Montalban Bravo's NPI number?
- Guillermo Montalban Bravo's National Provider Identifier (NPI) is 1487156782, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Guillermo Montalban Bravo's specialty?
- Guillermo Montalban Bravo is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Guillermo Montalban Bravo located?
- Guillermo Montalban Bravo's practice location on file with NPPES is 1515 Holcombe Blvd, Houston, TX 77030-4000.
- What is Guillermo Montalban Bravo's phone number?
- The practice phone number listed in the NPPES registry for Guillermo Montalban Bravo is (713) 792-6161.
- Does Guillermo Montalban Bravo accept Medicare?
- Guillermo Montalban Bravo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Guillermo Montalban Bravo's NPI active?
- Yes — Guillermo Montalban Bravo's NPI (1487156782) is active in the NPPES registry as of the last update on 2025-06-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.