diff --git a/qiskit/visualization/__init__.py b/qiskit/visualization/__init__.py
index 29eb5cf2c0cc..58baff4f0853 100644
--- a/qiskit/visualization/__init__.py
+++ b/qiskit/visualization/__init__.py
@@ -285,7 +285,7 @@
 from .pass_manager_visualization import pass_manager_drawer
 from .pass_manager_visualization import staged_pass_manager_drawer
 
-from .pulse.interpolation import step_wise, linear, cubic_spline
+from .pulse.interpolation import linear, cubic_spline
 from .pulse.qcstyle import PulseStyle, SchedStyle
 from .pulse_v2 import draw as pulse_drawer
 
diff --git a/qiskit/visualization/pulse/interpolation.py b/qiskit/visualization/pulse/interpolation.py
index b5d12a19cbe9..3a23a176d418 100644
--- a/qiskit/visualization/pulse/interpolation.py
+++ b/qiskit/visualization/pulse/interpolation.py
@@ -20,78 +20,7 @@
 from __future__ import annotations
 from functools import partial
 
-import numpy as np
-
-from qiskit.utils.deprecation import deprecate_func
-
-
-@deprecate_func(
-    additional_msg=(
-        "Instead, use the new interface in ``qiskit.visualization.pulse_drawer`` for "
-        "pulse visualization."
-    ),
-    since="0.23.0",
-    removal_timeline="no earlier than 6 months after the release date",
-)
-def interp1d(
-    time: np.ndarray, samples: np.ndarray, nop: int, kind: str = "linear"
-) -> tuple[np.ndarray, np.ndarray, np.ndarray]:
-    """Deprecated.
-
-    Scipy interpolation wrapper.
-
-    Args:
-        time: Time vector with length of ``samples`` + 1.
-        samples: Complex pulse envelope.
-        nop: Number of data points for interpolation.
-        kind: Scipy interpolation type.
-            See ``scipy.interpolate.interp1d`` documentation for more information.
-    Returns:
-        Interpolated time vector and real and imaginary part of waveform.
-    """
-    from scipy import interpolate
-
-    re_y = np.real(samples)
-    im_y = np.imag(samples)
-
-    dt = time[1] - time[0]
-
-    time += 0.5 * dt
-    cs_ry = interpolate.interp1d(time[:-1], re_y, kind=kind, bounds_error=False)
-    cs_iy = interpolate.interp1d(time[:-1], im_y, kind=kind, bounds_error=False)
-
-    time_ = np.linspace(time[0], time[-1] * dt, nop)
-
-    return time_, cs_ry(time_), cs_iy(time_)
-
-
-@deprecate_func(
-    additional_msg=(
-        "Instead, use the new interface in ``qiskit.visualization.pulse_drawer`` for "
-        "pulse visualization."
-    ),
-    since="0.23.0",
-    removal_timeline="no earlier than 6 months after the release date",
-)
-def step_wise(
-    time: np.ndarray, samples: np.ndarray, nop: int
-) -> tuple[np.ndarray, np.ndarray, np.ndarray]:
-    # pylint: disable=unused-argument
-    """Deprecated.
-
-    Keep uniform variation between sample values. No interpolation is applied.
-    Args:
-        time: Time vector with length of ``samples`` + 1.
-        samples: Complex pulse envelope.
-        nop: This argument is not used.
-    Returns:
-        Time vector and real and imaginary part of waveform.
-    """
-    samples_ = np.repeat(samples, 2)
-    re_y_ = np.real(samples_)
-    im_y_ = np.imag(samples_)
-    time__: np.ndarray = np.concatenate(([time[0]], np.repeat(time[1:-1], 2), [time[-1]]))
-    return time__, re_y_, im_y_
+from scipy.interpolate import interp1d
 
 
 linear = partial(interp1d, kind="linear")
diff --git a/qiskit/visualization/pulse/matplotlib.py b/qiskit/visualization/pulse/matplotlib.py
index 619677161ab2..5dd5b1984d07 100644
--- a/qiskit/visualization/pulse/matplotlib.py
+++ b/qiskit/visualization/pulse/matplotlib.py
@@ -23,7 +23,6 @@
 
 from qiskit.utils import optionals as _optionals
 from qiskit.visualization.pulse.qcstyle import PulseStyle, SchedStyle
-from qiskit.visualization.pulse.interpolation import step_wise
 from qiskit.pulse.channels import (
     DriveChannel,
     ControlChannel,
@@ -335,8 +334,6 @@ def draw(
         # revert back to their default rcParam keys.
         figure = plt.figure(dpi=self.style.dpi, figsize=self.style.figsize)
 
-        interp_method = interp_method or step_wise
-
         ax = figure.add_subplot(111)
         ax.set_facecolor(self.style.bg_color)
 
@@ -932,7 +929,6 @@ def draw(
 
         if channels is None:
             channels = []
-        interp_method = interp_method or step_wise
 
         if channel_scales is None:
             channel_scales = {}
diff --git a/releasenotes/notes/deprecate_interpolation_fix_11145-5c37ff0ea7af1fc8.yaml b/releasenotes/notes/deprecate_interpolation_fix_11145-5c37ff0ea7af1fc8.yaml
new file mode 100644
index 000000000000..246431eca65b
--- /dev/null
+++ b/releasenotes/notes/deprecate_interpolation_fix_11145-5c37ff0ea7af1fc8.yaml
@@ -0,0 +1,11 @@
+deprecations:
+  - |
+    The following functions are deprecated and will be removed in the future release this includes:
+    * :func:`~qiskit.visualization.pulse.interpolation.interp1d`
+    * :func:`~qiskit.visualization.pulse.interpolation.step_wise`
+    Instead, use the new interface in `qiskit.visualization.pulse_drawer` for pulse visualization.
+fixes:
+  - |
+    Issue #11145 `Remove deprecated code since 0.23`
+    
+