Quick answers
- Does Guillermo J. Morell accept Medicare assignment?
- Yes. Medicare's clinician data says Guillermo J. Morell accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Guillermo J. Morell see?
- In 2024, CMS data shows 90 Original Medicare patients and 338 services for Guillermo J. Morell. This counts Original Medicare only and measures volume, not quality.
- What is Guillermo J. Morell's NPI number?
- 1346238268. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Guillermo J. Morell, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 90 |
|---|---|
| Services billed to Medicare | 338 |
| Different services or procedures | 14 |
| Participating Medicare provider | Yes |
| Average age of these patients | 67 |
Most frequent services
- Dialysis services, 2-3 physician visits per month (20 years or older) (90961)80 services
- Dialysis services, 4 or more physician visits per month (20 years or older) (90960)67 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes (99232)55 services
- Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes (99233)35 services
- Hemodialysis procedure with physician evaluation (90935)28 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease75%
- Diabetes64%
- Ischemic heart disease61%
- Heart failure57%
Hospitals where Guillermo J. Morell works
Medicare's Facility Affiliation Data lists Guillermo J. Morell at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- HCA Houston Healthcare Medical CenterHouston, TX · Acute Care Hospital · Medicare rating: 4 of 5 stars · CCN 450659
- Houston Methodist HospitalHouston, TX · Acute Care Hospital · Medicare rating: 5 of 5 stars · CCN 450358
Practice locations
Addresses where Guillermo J. Morell is enrolled with Medicare (CMS data updated October 2, 2026).
- 6560 Fannin St, Suite 1532Houston, TX 77030 (713) 796‑0800
Specialties
- Nephrologyprimary
- Internal Medicinealso
Other nephrologists in Houston
Clinicians with the same Medicare primary specialty in Houston, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Puerto Rico School Of Medicine |
| Graduation year | 1985 (41 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1346238268 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians