Quick answers
- Does Charlie I. Gnaim accept Medicare assignment?
- Yes. Medicare's clinician data says Charlie I. Gnaim 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 Charlie I. Gnaim see?
- In 2024, CMS data shows 622 Original Medicare patients and 1,985 services for Charlie I. Gnaim. This counts Original Medicare only and measures volume, not quality.
- What is Charlie I. Gnaim's NPI number?
- 1245386424. 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 Charlie I. Gnaim, 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 | 622 |
|---|---|
| Services billed to Medicare | 1,985 |
| Different services or procedures | 53 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)740 services
- Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report (93000)454 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)102 services
- Insertion of needle into vein for collection of blood sample (36415)54 services
- Chemical destruction of first incompetent vein of arm or leg using imaging guidance (36482)53 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%
- Arthritis51%
- Ischemic heart disease51%
- Diabetes39%
- Chronic kidney disease30%
Hospitals where Charlie I. Gnaim works
Medicare's Facility Affiliation Data lists Charlie I. Gnaim 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 KingwoodKingwood, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · CCN 450775
- Memorial Hermann Northeast HospitalHumble, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · CCN 450684
Practice locations
Addresses where Charlie I. Gnaim is enrolled with Medicare (CMS data updated October 2, 2026).
- 18450 Hwy 59 NHumble, TX 77338 (281) 446‑6656
Group practices
Medicare enrollment lists Charlie I. Gnaim as a member of this group (CMS data updated October 2, 2026).
- Cardiovascular Association, P.L.L.C.48 clinicians in the group
Specialties
- Interventional Cardiologyprimary
Other interventional cardiologists in Humble
Clinicians with the same Medicare primary specialty in Humble, TX — not a recommendation.
Other clinicians in Cardiovascular Association, P.L.L.C.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At Houston |
| Graduation year | 2002 (24 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1245386424 |
| 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