diff --git a/pandas/_libs/missing.pyx b/pandas/_libs/missing.pyx
index 981d9cc9cbcb3..0fd1c2b21d5cd 100644
--- a/pandas/_libs/missing.pyx
+++ b/pandas/_libs/missing.pyx
@@ -32,8 +32,6 @@ from pandas._libs.tslibs.nattype cimport (
 )
 from pandas._libs.tslibs.np_datetime cimport (
     get_datetime64_unit,
-    get_datetime64_value,
-    get_timedelta64_value,
     import_pandas_datetime,
 )
 
@@ -122,16 +120,16 @@ cpdef bint is_matching_na(object left, object right, bint nan_matches_none=False
         )
     elif cnp.is_datetime64_object(left):
         return (
-            get_datetime64_value(left) == NPY_NAT
+            cnp.get_datetime64_value(left) == NPY_NAT
             and cnp.is_datetime64_object(right)
-            and get_datetime64_value(right) == NPY_NAT
+            and cnp.get_datetime64_value(right) == NPY_NAT
             and get_datetime64_unit(left) == get_datetime64_unit(right)
         )
     elif cnp.is_timedelta64_object(left):
         return (
-            get_timedelta64_value(left) == NPY_NAT
+            cnp.get_timedelta64_value(left) == NPY_NAT
             and cnp.is_timedelta64_object(right)
-            and get_timedelta64_value(right) == NPY_NAT
+            and cnp.get_timedelta64_value(right) == NPY_NAT
             and get_datetime64_unit(left) == get_datetime64_unit(right)
         )
     elif is_decimal_na(left):
@@ -170,9 +168,9 @@ cpdef bint checknull(object val, bint inf_as_na=False):
             return val == INF or val == NEGINF
         return False
     elif cnp.is_timedelta64_object(val):
-        return get_timedelta64_value(val) == NPY_NAT
+        return cnp.get_timedelta64_value(val) == NPY_NAT
     elif cnp.is_datetime64_object(val):
-        return get_datetime64_value(val) == NPY_NAT
+        return cnp.get_datetime64_value(val) == NPY_NAT
     else:
         return is_decimal_na(val)
 
diff --git a/pandas/_libs/tslibs/conversion.pyx b/pandas/_libs/tslibs/conversion.pyx
index 0568576c83870..ffc17e5d23258 100644
--- a/pandas/_libs/tslibs/conversion.pyx
+++ b/pandas/_libs/tslibs/conversion.pyx
@@ -41,7 +41,6 @@ from pandas._libs.tslibs.np_datetime cimport (
     convert_reso,
     get_conversion_factor,
     get_datetime64_unit,
-    get_datetime64_value,
     get_implementation_bounds,
     import_pandas_datetime,
     npy_datetime,
@@ -198,7 +197,7 @@ cdef int64_t get_datetime64_nanos(object val, NPY_DATETIMEUNIT reso) except? -1:
         NPY_DATETIMEUNIT unit
         npy_datetime ival
 
-    ival = get_datetime64_value(val)
+    ival = cnp.get_datetime64_value(val)
     if ival == NPY_NAT:
         return NPY_NAT
 
diff --git a/pandas/_libs/tslibs/nattype.pyx b/pandas/_libs/tslibs/nattype.pyx
index 2ed54ab71182a..3416c68a23f63 100644
--- a/pandas/_libs/tslibs/nattype.pyx
+++ b/pandas/_libs/tslibs/nattype.pyx
@@ -21,10 +21,6 @@ from numpy cimport int64_t
 cnp.import_array()
 
 cimport pandas._libs.tslibs.util as util
-from pandas._libs.tslibs.np_datetime cimport (
-    get_datetime64_value,
-    get_timedelta64_value,
-)
 
 # ----------------------------------------------------------------------
 # Constants
@@ -1439,7 +1435,7 @@ cdef bint is_dt64nat(object val):
     Is this a np.datetime64 object np.datetime64("NaT").
     """
     if cnp.is_datetime64_object(val):
-        return get_datetime64_value(val) == NPY_NAT
+        return cnp.get_datetime64_value(val) == NPY_NAT
     return False
 
 
@@ -1448,5 +1444,5 @@ cdef bint is_td64nat(object val):
     Is this a np.timedelta64 object np.timedelta64("NaT").
     """
     if cnp.is_timedelta64_object(val):
-        return get_timedelta64_value(val) == NPY_NAT
+        return cnp.get_timedelta64_value(val) == NPY_NAT
     return False
diff --git a/pandas/_libs/tslibs/np_datetime.pxd b/pandas/_libs/tslibs/np_datetime.pxd
index 60532174e8bdc..445b832e8a5bd 100644
--- a/pandas/_libs/tslibs/np_datetime.pxd
+++ b/pandas/_libs/tslibs/np_datetime.pxd
@@ -25,11 +25,6 @@ cdef extern from "numpy/arrayscalars.h":
         npy_datetime obval
         PyArray_DatetimeMetaData obmeta
 
-    ctypedef struct PyTimedeltaScalarObject:
-        # PyObject_HEAD
-        npy_timedelta obval
-        PyArray_DatetimeMetaData obmeta
-
 cdef extern from "numpy/ndarraytypes.h":
     ctypedef struct npy_datetimestruct:
         int64_t year
@@ -96,8 +91,6 @@ cdef int64_t pydate_to_dt64(
 )
 cdef void pydate_to_dtstruct(date val, npy_datetimestruct *dts) noexcept
 
-cdef npy_datetime get_datetime64_value(object obj) noexcept nogil
-cdef npy_timedelta get_timedelta64_value(object obj) noexcept nogil
 cdef NPY_DATETIMEUNIT get_datetime64_unit(object obj) noexcept nogil
 
 cdef int string_to_dts(
diff --git a/pandas/_libs/tslibs/np_datetime.pyx b/pandas/_libs/tslibs/np_datetime.pyx
index 25249e4f6f225..3ffd70f83e88f 100644
--- a/pandas/_libs/tslibs/np_datetime.pyx
+++ b/pandas/_libs/tslibs/np_datetime.pyx
@@ -59,22 +59,6 @@ cdef extern from "pandas/datetime/pd_datetime.h":
 # ----------------------------------------------------------------------
 # numpy object inspection
 
-cdef npy_datetime get_datetime64_value(object obj) noexcept nogil:
-    """
-    returns the int64 value underlying scalar numpy datetime64 object
-
-    Note that to interpret this as a datetime, the corresponding unit is
-    also needed.  That can be found using `get_datetime64_unit`.
-    """
-    return (<PyDatetimeScalarObject*>obj).obval
-
-
-cdef npy_timedelta get_timedelta64_value(object obj) noexcept nogil:
-    """
-    returns the int64 value underlying scalar numpy timedelta64 object
-    """
-    return (<PyTimedeltaScalarObject*>obj).obval
-
 
 cdef NPY_DATETIMEUNIT get_datetime64_unit(object obj) noexcept nogil:
     """
@@ -278,6 +262,7 @@ cdef void pydate_to_dtstruct(date val, npy_datetimestruct *dts) noexcept:
     dts.ps = dts.as = 0
     return
 
+
 cdef int64_t pydate_to_dt64(
     date val, npy_datetimestruct *dts, NPY_DATETIMEUNIT reso=NPY_FR_ns
 ):
diff --git a/pandas/_libs/tslibs/period.pyx b/pandas/_libs/tslibs/period.pyx
index 518577895ec9b..700f500c1d8b8 100644
--- a/pandas/_libs/tslibs/period.pyx
+++ b/pandas/_libs/tslibs/period.pyx
@@ -53,7 +53,6 @@ from pandas._libs.tslibs.np_datetime cimport (
     NPY_FR_D,
     astype_overflowsafe,
     check_dts_bounds,
-    get_timedelta64_value,
     import_pandas_datetime,
     npy_datetimestruct,
     npy_datetimestruct_to_datetime,
@@ -1822,7 +1821,7 @@ cdef class _Period(PeriodMixin):
 
         if (
             cnp.is_timedelta64_object(other) and
-            get_timedelta64_value(other) == NPY_NAT
+            cnp.get_timedelta64_value(other) == NPY_NAT
         ):
             # i.e. np.timedelta64("nat")
             return NaT
diff --git a/pandas/_libs/tslibs/timedeltas.pyx b/pandas/_libs/tslibs/timedeltas.pyx
index bfa0a9e0b1864..a423137c68123 100644
--- a/pandas/_libs/tslibs/timedeltas.pyx
+++ b/pandas/_libs/tslibs/timedeltas.pyx
@@ -63,7 +63,6 @@ from pandas._libs.tslibs.np_datetime cimport (
     cmp_scalar,
     convert_reso,
     get_datetime64_unit,
-    get_timedelta64_value,
     get_unit_from_dtype,
     import_pandas_datetime,
     npy_datetimestruct,
@@ -261,7 +260,7 @@ cpdef int64_t delta_to_nanoseconds(
                 "delta_to_nanoseconds does not support Y or M units, "
                 "as their duration in nanoseconds is ambiguous."
             )
-        n = get_timedelta64_value(delta)
+        n = cnp.get_timedelta64_value(delta)
 
     elif PyDelta_Check(delta):
         in_reso = NPY_DATETIMEUNIT.NPY_FR_us
@@ -313,7 +312,7 @@ cdef object ensure_td64ns(object ts):
     ):
         unitstr = npy_unit_to_abbrev(td64_unit)
 
-        td64_value = get_timedelta64_value(ts)
+        td64_value = cnp.get_timedelta64_value(ts)
 
         mult = precision_from_unit(unitstr)[0]
         try:
@@ -484,7 +483,7 @@ cdef int64_t _item_to_timedelta64(
     See array_to_timedelta64.
     """
     try:
-        return get_timedelta64_value(convert_to_timedelta64(item, parsed_unit))
+        return cnp.get_timedelta64_value(convert_to_timedelta64(item, parsed_unit))
     except ValueError as err:
         if errors == "coerce":
             return NPY_NAT
@@ -1859,7 +1858,7 @@ class Timedelta(_Timedelta):
         elif is_timedelta64_object(value):
             # Retain the resolution if possible, otherwise cast to the nearest
             #  supported resolution.
-            new_value = get_timedelta64_value(value)
+            new_value = cnp.get_timedelta64_value(value)
             if new_value == NPY_NAT:
                 # i.e. np.timedelta64("NaT")
                 return NaT
@@ -2223,7 +2222,7 @@ def truediv_object_array(ndarray left, ndarray right):
         td64 = left[i]
         obj = right[i]
 
-        if get_timedelta64_value(td64) == NPY_NAT:
+        if cnp.get_timedelta64_value(td64) == NPY_NAT:
             # td here should be interpreted as a td64 NaT
             if _should_cast_to_timedelta(obj):
                 res_value = np.nan
@@ -2252,7 +2251,7 @@ def floordiv_object_array(ndarray left, ndarray right):
         td64 = left[i]
         obj = right[i]
 
-        if get_timedelta64_value(td64) == NPY_NAT:
+        if cnp.get_timedelta64_value(td64) == NPY_NAT:
             # td here should be interpreted as a td64 NaT
             if _should_cast_to_timedelta(obj):
                 res_value = np.nan
diff --git a/pandas/_libs/tslibs/timestamps.pyx b/pandas/_libs/tslibs/timestamps.pyx
index bf25eaeff19a5..01aea60268574 100644
--- a/pandas/_libs/tslibs/timestamps.pyx
+++ b/pandas/_libs/tslibs/timestamps.pyx
@@ -88,7 +88,6 @@ from pandas._libs.tslibs.np_datetime cimport (
     cmp_scalar,
     convert_reso,
     get_datetime64_unit,
-    get_datetime64_value,
     get_unit_from_dtype,
     import_pandas_datetime,
     npy_datetimestruct,
@@ -307,7 +306,7 @@ cdef class _Timestamp(ABCTimestamp):
             NPY_DATETIMEUNIT reso
 
         reso = get_datetime64_unit(dt64)
-        value = get_datetime64_value(dt64)
+        value = cnp.get_datetime64_value(dt64)
         return cls._from_value_and_reso(value, reso, None)
 
     # -----------------------------------------------------------------
diff --git a/pandas/_libs/tslibs/util.pxd b/pandas/_libs/tslibs/util.pxd
index 61812bafc16d2..ddd07276c7a7e 100644
--- a/pandas/_libs/tslibs/util.pxd
+++ b/pandas/_libs/tslibs/util.pxd
@@ -33,8 +33,6 @@ cdef extern from "numpy/arrayobject.h":
     PyTypeObject PyFloatingArrType_Type
 
 cdef extern from "numpy/ndarrayobject.h":
-    PyTypeObject PyTimedeltaArrType_Type
-    PyTypeObject PyDatetimeArrType_Type
     PyTypeObject PyComplexFloatingArrType_Type
     PyTypeObject PyBoolArrType_Type